diff --git a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/CountHashedGramTokensDescriptor.java b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/CountHashedGramTokensDescriptor.java
index fdf0093..2fb56c7 100644
--- a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/CountHashedGramTokensDescriptor.java
+++ b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/CountHashedGramTokensDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.BuiltinType;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
@@ -39,12 +38,7 @@
 public class CountHashedGramTokensDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new CountHashedGramTokensDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = CountHashedGramTokensDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/CountHashedWordTokensDescriptor.java b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/CountHashedWordTokensDescriptor.java
index 0fac74c..c565a98 100644
--- a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/CountHashedWordTokensDescriptor.java
+++ b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/CountHashedWordTokensDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.BuiltinType;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
@@ -39,12 +38,7 @@
 public class CountHashedWordTokensDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new CountHashedWordTokensDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = CountHashedWordTokensDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/EditDistanceCheckDescriptor.java b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/EditDistanceCheckDescriptor.java
index de5ad44..17a9ee5 100644
--- a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/EditDistanceCheckDescriptor.java
+++ b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/EditDistanceCheckDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.asterix.runtime.evaluators.common.EditDistanceCheckEvaluator;
@@ -34,12 +33,7 @@
 public class EditDistanceCheckDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new EditDistanceCheckDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = EditDistanceCheckDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/EditDistanceContainsDescriptor.java b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/EditDistanceContainsDescriptor.java
index e721a9a..8ad81a9 100644
--- a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/EditDistanceContainsDescriptor.java
+++ b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/EditDistanceContainsDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.asterix.runtime.evaluators.common.EditDistanceContainsEvaluator;
@@ -34,12 +33,7 @@
 public class EditDistanceContainsDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new EditDistanceContainsDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = EditDistanceContainsDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/EditDistanceDescriptor.java b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/EditDistanceDescriptor.java
index 1edb205..9bd03ea 100644
--- a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/EditDistanceDescriptor.java
+++ b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/EditDistanceDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.asterix.runtime.evaluators.common.EditDistanceEvaluator;
@@ -34,12 +33,7 @@
 public class EditDistanceDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new EditDistanceDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = EditDistanceDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/EditDistanceListIsFilterableDescriptor.java b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/EditDistanceListIsFilterableDescriptor.java
index cbba298..2c692ca 100644
--- a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/EditDistanceListIsFilterableDescriptor.java
+++ b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/EditDistanceListIsFilterableDescriptor.java
@@ -27,7 +27,6 @@
 import org.apache.asterix.formats.nontagged.SerializerDeserializerProvider;
 import org.apache.asterix.om.base.ABoolean;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -60,12 +59,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new EditDistanceListIsFilterableDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = EditDistanceListIsFilterableDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/EditDistanceStringIsFilterableDescriptor.java b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/EditDistanceStringIsFilterableDescriptor.java
index 8cacde0..3915405 100644
--- a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/EditDistanceStringIsFilterableDescriptor.java
+++ b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/EditDistanceStringIsFilterableDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -42,12 +41,7 @@
 public class EditDistanceStringIsFilterableDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new EditDistanceStringIsFilterableDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = EditDistanceStringIsFilterableDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/GramTokensDescriptor.java b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/GramTokensDescriptor.java
index 9145dcc..47fd5e3 100644
--- a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/GramTokensDescriptor.java
+++ b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/GramTokensDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.BuiltinType;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
@@ -38,12 +37,7 @@
 public class GramTokensDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new GramTokensDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = GramTokensDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/HashedGramTokensDescriptor.java b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/HashedGramTokensDescriptor.java
index 91af6f0..6504ead 100644
--- a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/HashedGramTokensDescriptor.java
+++ b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/HashedGramTokensDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.BuiltinType;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
@@ -38,12 +37,7 @@
 public class HashedGramTokensDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new HashedGramTokensDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = HashedGramTokensDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/HashedWordTokensDescriptor.java b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/HashedWordTokensDescriptor.java
index 9e7ecaf..874a359 100644
--- a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/HashedWordTokensDescriptor.java
+++ b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/HashedWordTokensDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.BuiltinType;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
@@ -39,12 +38,7 @@
 public class HashedWordTokensDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new HashedWordTokensDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = HashedWordTokensDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/PrefixLenDescriptor.java b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/PrefixLenDescriptor.java
index da331b0..5c67d09 100644
--- a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/PrefixLenDescriptor.java
+++ b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/PrefixLenDescriptor.java
@@ -27,7 +27,6 @@
 import org.apache.asterix.fuzzyjoin.similarity.SimilarityFilters;
 import org.apache.asterix.om.base.AInt32;
 import org.apache.asterix.om.base.AMutableInt32;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -51,12 +50,7 @@
     private static final long serialVersionUID = 1L;
     private final static FunctionIdentifier FID =
             new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "prefix-len@3", 3);
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new PrefixLenDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = PrefixLenDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/PrefixLenJaccardDescriptor.java b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/PrefixLenJaccardDescriptor.java
index 25942f8..62cc43d 100644
--- a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/PrefixLenJaccardDescriptor.java
+++ b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/PrefixLenJaccardDescriptor.java
@@ -28,7 +28,6 @@
 import org.apache.asterix.om.base.AInt32;
 import org.apache.asterix.om.base.AMutableInt32;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -50,12 +49,7 @@
 public class PrefixLenJaccardDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new PrefixLenJaccardDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = PrefixLenJaccardDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/SimilarityDescriptor.java b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/SimilarityDescriptor.java
index 78d0507..95fd5bf 100644
--- a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/SimilarityDescriptor.java
+++ b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/SimilarityDescriptor.java
@@ -32,7 +32,6 @@
 import org.apache.asterix.fuzzyjoin.similarity.SimilarityMetric;
 import org.apache.asterix.om.base.ADouble;
 import org.apache.asterix.om.base.AMutableDouble;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -56,12 +55,7 @@
     private static final long serialVersionUID = 1L;
     private final static FunctionIdentifier FID =
             new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "similarity@7", 7);
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SimilarityDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SimilarityDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/SimilarityJaccardCheckDescriptor.java b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/SimilarityJaccardCheckDescriptor.java
index 167d34e..3393fcf 100644
--- a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/SimilarityJaccardCheckDescriptor.java
+++ b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/SimilarityJaccardCheckDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.asterix.runtime.evaluators.common.SimilarityJaccardCheckEvaluator;
@@ -34,12 +33,7 @@
 public class SimilarityJaccardCheckDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SimilarityJaccardCheckDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SimilarityJaccardCheckDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/SimilarityJaccardDescriptor.java b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/SimilarityJaccardDescriptor.java
index dff0d22..9c3fbb1 100644
--- a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/SimilarityJaccardDescriptor.java
+++ b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/SimilarityJaccardDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.asterix.runtime.evaluators.common.SimilarityJaccardEvaluator;
@@ -34,12 +33,7 @@
 public class SimilarityJaccardDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SimilarityJaccardDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SimilarityJaccardDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/SimilarityJaccardPrefixCheckDescriptor.java b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/SimilarityJaccardPrefixCheckDescriptor.java
index e0599d6..a7e357f 100644
--- a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/SimilarityJaccardPrefixCheckDescriptor.java
+++ b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/SimilarityJaccardPrefixCheckDescriptor.java
@@ -26,7 +26,6 @@
 import org.apache.asterix.om.base.AFloat;
 import org.apache.asterix.om.base.AMutableFloat;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.AOrderedListType;
 import org.apache.asterix.om.types.BuiltinType;
@@ -44,12 +43,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SimilarityJaccardPrefixCheckDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SimilarityJaccardPrefixCheckDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/SimilarityJaccardPrefixDescriptor.java b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/SimilarityJaccardPrefixDescriptor.java
index a3efd7c..7aa68ab 100644
--- a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/SimilarityJaccardPrefixDescriptor.java
+++ b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/SimilarityJaccardPrefixDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.runtime.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.asterix.runtime.evaluators.common.SimilarityJaccardPrefixEvaluator;
@@ -32,12 +31,7 @@
 public class SimilarityJaccardPrefixDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SimilarityJaccardPrefixDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SimilarityJaccardPrefixDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/SimilarityJaccardSortedCheckDescriptor.java b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/SimilarityJaccardSortedCheckDescriptor.java
index b33fc18..f8731fc 100644
--- a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/SimilarityJaccardSortedCheckDescriptor.java
+++ b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/SimilarityJaccardSortedCheckDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.asterix.runtime.evaluators.common.SimilarityJaccardSortedCheckEvaluator;
@@ -35,12 +34,7 @@
 public class SimilarityJaccardSortedCheckDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SimilarityJaccardSortedCheckDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SimilarityJaccardSortedCheckDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/SimilarityJaccardSortedDescriptor.java b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/SimilarityJaccardSortedDescriptor.java
index 71e747b..33e4030 100644
--- a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/SimilarityJaccardSortedDescriptor.java
+++ b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/SimilarityJaccardSortedDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.asterix.runtime.evaluators.common.SimilarityJaccardSortedEvaluator;
@@ -35,12 +34,7 @@
 public class SimilarityJaccardSortedDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SimilarityJaccardSortedDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SimilarityJaccardSortedDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/SpatialIntersectDescriptor.java b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/SpatialIntersectDescriptor.java
index a52c47c..5a01007 100644
--- a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/SpatialIntersectDescriptor.java
+++ b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/SpatialIntersectDescriptor.java
@@ -34,7 +34,6 @@
 import org.apache.asterix.fuzzyjoin.IntArray;
 import org.apache.asterix.om.base.ABoolean;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.EnumDeserializer;
@@ -59,12 +58,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SpatialIntersectDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SpatialIntersectDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/WordTokensDescriptor.java b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/WordTokensDescriptor.java
index 805ac9a..2d52484 100644
--- a/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/WordTokensDescriptor.java
+++ b/asterixdb/asterix-fuzzyjoin/src/main/java/org/apache/asterix/runtime/evaluators/functions/WordTokensDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.BuiltinType;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
@@ -39,12 +38,7 @@
 public class WordTokensDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new WordTokensDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = WordTokensDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/aggregates/STUnionAggregateDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/aggregates/STUnionAggregateDescriptor.java
index 9caa7ae..c9bc330 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/aggregates/STUnionAggregateDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/aggregates/STUnionAggregateDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.aggregates;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -35,12 +34,7 @@
 public class STUnionAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STUnionAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STUnionAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STAsBinaryDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STAsBinaryDescriptor.java
index a00e5a8..e0e43bb 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STAsBinaryDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STAsBinaryDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -29,12 +28,7 @@
 public class STAsBinaryDescriptor extends AbstractSTSingleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STAsBinaryDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STAsBinaryDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STAsGeoJSONDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STAsGeoJSONDescriptor.java
index 30ebdcc..760261d 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STAsGeoJSONDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STAsGeoJSONDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -29,12 +28,7 @@
 public class STAsGeoJSONDescriptor extends AbstractSTSingleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STAsGeoJSONDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STAsGeoJSONDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STAsTextDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STAsTextDescriptor.java
index d3ac964..12bdb30 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STAsTextDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STAsTextDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -29,12 +28,7 @@
 public class STAsTextDescriptor extends AbstractSTSingleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STAsTextDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STAsTextDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STBoundaryDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STBoundaryDescriptor.java
index 286c9c7..9bd6ba1 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STBoundaryDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STBoundaryDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -29,12 +28,7 @@
 public class STBoundaryDescriptor extends AbstractSTSingleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STBoundaryDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STBoundaryDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STContainsDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STContainsDescriptor.java
index 0235e52..34c21bf 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STContainsDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STContainsDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -29,12 +28,7 @@
 public class STContainsDescriptor extends AbstractSTDoubleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STContainsDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STContainsDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry0, OGCGeometry geometry1) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STCoordDimDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STCoordDimDescriptor.java
index 5781e2b..a0c10f7 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STCoordDimDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STCoordDimDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -29,12 +28,7 @@
 public class STCoordDimDescriptor extends AbstractSTSingleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STCoordDimDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STCoordDimDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STCrossesDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STCrossesDescriptor.java
index a2bd59e..c276e7e 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STCrossesDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STCrossesDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -29,12 +28,7 @@
 public class STCrossesDescriptor extends AbstractSTDoubleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STCrossesDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STCrossesDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry0, OGCGeometry geometry1) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STDifferenceDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STDifferenceDescriptor.java
index 48b0f9e..8a49d4b 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STDifferenceDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STDifferenceDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -29,12 +28,7 @@
 public class STDifferenceDescriptor extends AbstractSTDoubleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STDifferenceDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STDifferenceDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry0, OGCGeometry geometry1) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STDimensionDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STDimensionDescriptor.java
index 6c0391b..34d7282 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STDimensionDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STDimensionDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -29,12 +28,7 @@
 public class STDimensionDescriptor extends AbstractSTSingleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STDimensionDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STDimensionDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STDisjointDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STDisjointDescriptor.java
index 01827ee..0a890b9 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STDisjointDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STDisjointDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -29,12 +28,7 @@
 public class STDisjointDescriptor extends AbstractSTDoubleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STDisjointDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STDisjointDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry0, OGCGeometry geometry1) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STDistanceDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STDistanceDescriptor.java
index 997dad8..75b8b41 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STDistanceDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STDistanceDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -29,12 +28,7 @@
 public class STDistanceDescriptor extends AbstractSTDoubleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STDistanceDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STDistanceDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry0, OGCGeometry geometry1) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STEndPointDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STEndPointDescriptor.java
index 659d100..ab0ba5c 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STEndPointDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STEndPointDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -30,12 +29,7 @@
 public class STEndPointDescriptor extends AbstractSTSingleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STEndPointDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STEndPointDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STEnvelopeDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STEnvelopeDescriptor.java
index bde4f50..13555c6 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STEnvelopeDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STEnvelopeDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -29,12 +28,7 @@
 public class STEnvelopeDescriptor extends AbstractSTSingleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STEnvelopeDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STEnvelopeDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STEqualsDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STEqualsDescriptor.java
index 8de5451..e0c0cf8 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STEqualsDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STEqualsDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -29,12 +28,7 @@
 public class STEqualsDescriptor extends AbstractSTDoubleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STEqualsDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STEqualsDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry0, OGCGeometry geometry1) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STExteriorRingDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STExteriorRingDescriptor.java
index 3df1aa3..5888b63 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STExteriorRingDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STExteriorRingDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -30,12 +29,7 @@
 public class STExteriorRingDescriptor extends AbstractSTSingleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STExteriorRingDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STExteriorRingDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STGeomFromTextDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STGeomFromTextDescriptor.java
index e0795f1..73272ae 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STGeomFromTextDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STGeomFromTextDescriptor.java
@@ -26,7 +26,6 @@
 
 import org.apache.asterix.dataflow.data.nontagged.serde.AStringSerializerDeserializer;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
@@ -50,12 +49,7 @@
 
 public class STGeomFromTextDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STGeomFromTextDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STGeomFromTextDescriptor::new;
 
     private static final long serialVersionUID = 1L;
 
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STGeomFromTextSRIDDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STGeomFromTextSRIDDescriptor.java
index 04ea807..aca726e 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STGeomFromTextSRIDDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STGeomFromTextSRIDDescriptor.java
@@ -27,7 +27,6 @@
 import org.apache.asterix.dataflow.data.nontagged.serde.AInt64SerializerDeserializer;
 import org.apache.asterix.dataflow.data.nontagged.serde.AStringSerializerDeserializer;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
@@ -51,12 +50,7 @@
 
 public class STGeomFromTextSRIDDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STGeomFromTextSRIDDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STGeomFromTextSRIDDescriptor::new;
 
     private static final long serialVersionUID = 1L;
 
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STGeomFromWKBDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STGeomFromWKBDescriptor.java
index e4f3be3..177bde4 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STGeomFromWKBDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STGeomFromWKBDescriptor.java
@@ -24,7 +24,6 @@
 import java.io.IOException;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
@@ -43,12 +42,7 @@
 
 public class STGeomFromWKBDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STGeomFromWKBDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STGeomFromWKBDescriptor::new;
 
     private static final long serialVersionUID = 1L;
 
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STGeomentryTypeDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STGeomentryTypeDescriptor.java
index 72b59f8..8a432d1 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STGeomentryTypeDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STGeomentryTypeDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -29,12 +28,7 @@
 public class STGeomentryTypeDescriptor extends AbstractSTSingleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STGeomentryTypeDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STGeomentryTypeDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STGeometryNDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STGeometryNDescriptor.java
index 848241c..5d9642e 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STGeometryNDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STGeometryNDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -29,12 +28,7 @@
 
 public class STGeometryNDescriptor extends AbstractSTGeometryNDescriptor {
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STGeometryNDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STGeometryNDescriptor::new;
 
     private static final long serialVersionUID = 1L;
 
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STInteriorRingNDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STInteriorRingNDescriptor.java
index dcf2b9f..5f6d956 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STInteriorRingNDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STInteriorRingNDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -29,12 +28,7 @@
 
 public class STInteriorRingNDescriptor extends AbstractSTGeometryNDescriptor {
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STInteriorRingNDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STInteriorRingNDescriptor::new;
 
     private static final long serialVersionUID = 1L;
 
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STIntersectionDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STIntersectionDescriptor.java
index 2653266..5a3d2bf 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STIntersectionDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STIntersectionDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -29,12 +28,7 @@
 public class STIntersectionDescriptor extends AbstractSTDoubleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STIntersectionDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STIntersectionDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry0, OGCGeometry geometry1) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STIntersectsDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STIntersectsDescriptor.java
index a442975..34a1407 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STIntersectsDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STIntersectsDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -29,12 +28,7 @@
 public class STIntersectsDescriptor extends AbstractSTDoubleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STIntersectsDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STIntersectsDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry0, OGCGeometry geometry1) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STIsClosedDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STIsClosedDescriptor.java
index 13f86b6..ff55f9f 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STIsClosedDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STIsClosedDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -36,12 +35,7 @@
 public class STIsClosedDescriptor extends AbstractSTSingleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STIsClosedDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STIsClosedDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STIsCollectionDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STIsCollectionDescriptor.java
index 1d42b74..544fdf3 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STIsCollectionDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STIsCollectionDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -29,12 +28,7 @@
 public class STIsCollectionDescriptor extends AbstractSTSingleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STIsCollectionDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STIsCollectionDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STIsEmptyDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STIsEmptyDescriptor.java
index 496e416..1adcb0e 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STIsEmptyDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STIsEmptyDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -29,12 +28,7 @@
 public class STIsEmptyDescriptor extends AbstractSTSingleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STIsEmptyDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STIsEmptyDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STIsRingDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STIsRingDescriptor.java
index 3a56197..02ea049a 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STIsRingDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STIsRingDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -30,12 +29,7 @@
 public class STIsRingDescriptor extends AbstractSTSingleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STIsRingDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STIsRingDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STIsSimpleDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STIsSimpleDescriptor.java
index d905528..b8b2d63 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STIsSimpleDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STIsSimpleDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -29,12 +28,7 @@
 public class STIsSimpleDescriptor extends AbstractSTSingleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STIsSimpleDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STIsSimpleDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STLengthDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STLengthDescriptor.java
index 91d31fc..7357813 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STLengthDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STLengthDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -33,12 +32,7 @@
 public class STLengthDescriptor extends AbstractSTSingleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STLengthDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STLengthDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STLineFromMultiPointDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STLineFromMultiPointDescriptor.java
index df7b42c..b716b5c 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STLineFromMultiPointDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STLineFromMultiPointDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -34,12 +33,7 @@
 public class STLineFromMultiPointDescriptor extends AbstractSTSingleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STLineFromMultiPointDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STLineFromMultiPointDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STMDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STMDescriptor.java
index 67f966a..e208771 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STMDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STMDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -30,12 +29,7 @@
 public class STMDescriptor extends AbstractSTSingleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STMDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STMDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STMakeEnvelopeDescriptorSRID.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STMakeEnvelopeDescriptorSRID.java
index 191e6c3..3aa9e7b 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STMakeEnvelopeDescriptorSRID.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STMakeEnvelopeDescriptorSRID.java
@@ -23,7 +23,6 @@
 import java.nio.ByteBuffer;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.runtime.exceptions.InvalidDataFormatException;
@@ -43,12 +42,7 @@
 
 public class STMakeEnvelopeDescriptorSRID extends AbstractGetValDescriptor {
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STMakeEnvelopeDescriptorSRID();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STMakeEnvelopeDescriptorSRID::new;
 
     private static final long serialVersionUID = 1L;
 
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STMakePoint3DDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STMakePoint3DDescriptor.java
index e157f52..4a5cf7e 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STMakePoint3DDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STMakePoint3DDescriptor.java
@@ -24,7 +24,6 @@
 import org.apache.asterix.dataflow.data.nontagged.serde.AGeometrySerializerDeserializer;
 import org.apache.asterix.om.base.AGeometry;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -44,12 +43,7 @@
 public class STMakePoint3DDescriptor extends AbstractGetValDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STMakePoint3DDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STMakePoint3DDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STMakePoint3DWithMDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STMakePoint3DWithMDescriptor.java
index 3505ac6..55baa37 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STMakePoint3DWithMDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STMakePoint3DWithMDescriptor.java
@@ -24,7 +24,6 @@
 import org.apache.asterix.dataflow.data.nontagged.serde.AGeometrySerializerDeserializer;
 import org.apache.asterix.om.base.AGeometry;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -44,12 +43,7 @@
 public class STMakePoint3DWithMDescriptor extends AbstractGetValDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STMakePoint3DWithMDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STMakePoint3DWithMDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STMakePointDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STMakePointDescriptor.java
index 86c4d01..c3b7b36 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STMakePointDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STMakePointDescriptor.java
@@ -24,7 +24,6 @@
 import org.apache.asterix.dataflow.data.nontagged.serde.AGeometrySerializerDeserializer;
 import org.apache.asterix.om.base.AGeometry;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -44,12 +43,7 @@
 public class STMakePointDescriptor extends AbstractGetValDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STMakePointDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STMakePointDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STNPointsDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STNPointsDescriptor.java
index aca1094..309d325 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STNPointsDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STNPointsDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -33,12 +32,7 @@
 public class STNPointsDescriptor extends AbstractSTSingleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STNPointsDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STNPointsDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STNRingsDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STNRingsDescriptor.java
index caed1ff..f8e313d 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STNRingsDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STNRingsDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -31,12 +30,7 @@
 public class STNRingsDescriptor extends AbstractSTSingleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STNRingsDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STNRingsDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STNumGeometriesDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STNumGeometriesDescriptor.java
index 2d66712..e87d1f4 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STNumGeometriesDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STNumGeometriesDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -30,12 +29,7 @@
 public class STNumGeometriesDescriptor extends AbstractSTSingleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STNumGeometriesDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STNumGeometriesDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STNumInteriorRingsDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STNumInteriorRingsDescriptor.java
index f529a18..19f2e11 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STNumInteriorRingsDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STNumInteriorRingsDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -30,12 +29,7 @@
 public class STNumInteriorRingsDescriptor extends AbstractSTSingleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STNumInteriorRingsDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STNumInteriorRingsDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STOverlapsDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STOverlapsDescriptor.java
index 59ca76f..61286b0 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STOverlapsDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STOverlapsDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -29,12 +28,7 @@
 public class STOverlapsDescriptor extends AbstractSTDoubleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STOverlapsDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STOverlapsDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry0, OGCGeometry geometry1) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STPointNDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STPointNDescriptor.java
index b7491e0..e0495f5 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STPointNDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STPointNDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -29,12 +28,7 @@
 
 public class STPointNDescriptor extends AbstractSTGeometryNDescriptor {
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STPointNDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STPointNDescriptor::new;
 
     private static final long serialVersionUID = 1L;
 
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STPolygonizeDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STPolygonizeDescriptor.java
index e10b3a0..e2fcd8a 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STPolygonizeDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STPolygonizeDescriptor.java
@@ -32,7 +32,6 @@
 import org.apache.asterix.om.base.IACursor;
 import org.apache.asterix.om.base.IAObject;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.AOrderedListType;
 import org.apache.asterix.om.types.ATypeTag;
@@ -58,12 +57,7 @@
 
 public class STPolygonizeDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STPolygonizeDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STPolygonizeDescriptor::new;
 
     private static final long serialVersionUID = 1L;
 
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STRelateDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STRelateDescriptor.java
index 61b801b..c3dc132 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STRelateDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STRelateDescriptor.java
@@ -28,7 +28,6 @@
 import org.apache.asterix.formats.nontagged.SerializerDeserializerProvider;
 import org.apache.asterix.om.base.ABoolean;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -50,12 +49,7 @@
 
 public class STRelateDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STRelateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STRelateDescriptor::new;
 
     private static final long serialVersionUID = 1L;
 
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STSRIDDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STSRIDDescriptor.java
index 470cc82..e50678a 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STSRIDDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STSRIDDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -29,12 +28,7 @@
 public class STSRIDDescriptor extends AbstractSTSingleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STSRIDDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STSRIDDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STStartPointDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STStartPointDescriptor.java
index fd16405..127b0d5 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STStartPointDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STStartPointDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -30,12 +29,7 @@
 public class STStartPointDescriptor extends AbstractSTSingleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STStartPointDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STStartPointDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STSymDifferenceDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STSymDifferenceDescriptor.java
index 3a60f35..e4d0507 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STSymDifferenceDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STSymDifferenceDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -29,12 +28,7 @@
 public class STSymDifferenceDescriptor extends AbstractSTDoubleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STSymDifferenceDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STSymDifferenceDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry0, OGCGeometry geometry1) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STTouchesDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STTouchesDescriptor.java
index d7595d9..ddf6550 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STTouchesDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STTouchesDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -29,12 +28,7 @@
 public class STTouchesDescriptor extends AbstractSTDoubleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STTouchesDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STTouchesDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry0, OGCGeometry geometry1) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STUnionDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STUnionDescriptor.java
index 693723e..1cfea10 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STUnionDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STUnionDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -29,12 +28,7 @@
 public class STUnionDescriptor extends AbstractSTDoubleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STUnionDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STUnionDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry0, OGCGeometry geometry1) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STWithinDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STWithinDescriptor.java
index 809779f..c78e48f 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STWithinDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STWithinDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -29,12 +28,7 @@
 public class STWithinDescriptor extends AbstractSTDoubleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STWithinDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STWithinDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry0, OGCGeometry geometry1) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STXDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STXDescriptor.java
index 109d7f8..608e55cc 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STXDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STXDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -30,12 +29,7 @@
 public class STXDescriptor extends AbstractSTSingleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STXDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STXDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STXMaxDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STXMaxDescriptor.java
index 887a423..2431f3f 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STXMaxDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STXMaxDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -31,12 +30,7 @@
 public class STXMaxDescriptor extends AbstractSTSingleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STXMaxDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STXMaxDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STXMinDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STXMinDescriptor.java
index 98a23b5..66db0c6 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STXMinDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STXMinDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -31,12 +30,7 @@
 public class STXMinDescriptor extends AbstractSTSingleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STXMinDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STXMinDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STYDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STYDescriptor.java
index 8f867a7..32baa0a 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STYDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STYDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -30,12 +29,7 @@
 public class STYDescriptor extends AbstractSTSingleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STYDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STYDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STYMaxDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STYMaxDescriptor.java
index 5d0b0f8..7b82915 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STYMaxDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STYMaxDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -31,12 +30,7 @@
 public class STYMaxDescriptor extends AbstractSTSingleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STYMaxDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STYMaxDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STYMinDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STYMinDescriptor.java
index 2b2d723..1cc5e88 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STYMinDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STYMinDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -31,12 +30,7 @@
 public class STYMinDescriptor extends AbstractSTSingleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STYMinDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STYMinDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STZDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STZDescriptor.java
index 2079ab0..739775a 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STZDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STZDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -30,12 +29,7 @@
 public class STZDescriptor extends AbstractSTSingleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STZDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STZDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STZMaxDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STZMaxDescriptor.java
index ab58365..cb3f54e 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STZMaxDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STZMaxDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -29,12 +28,7 @@
 public class STZMaxDescriptor extends AbstractSTSingleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STZMaxDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STZMaxDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry) throws HyracksDataException {
diff --git a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STZMinDescriptor.java b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STZMinDescriptor.java
index c8731ee..3f6f6b3 100644
--- a/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STZMinDescriptor.java
+++ b/asterixdb/asterix-geo/src/main/java/org/apache/asterix/geo/evaluators/functions/STZMinDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.geo.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
 import org.apache.hyracks.api.exceptions.HyracksDataException;
@@ -29,12 +28,7 @@
 public class STZMinDescriptor extends AbstractSTSingleGeometryDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new STZMinDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = STZMinDescriptor::new;
 
     @Override
     protected Object evaluateOGCGeometry(OGCGeometry geometry) throws HyracksDataException {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableAvgAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableAvgAggregateDescriptor.java
index e621886..8c7a1ff 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableAvgAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableAvgAggregateDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.common.exceptions.AlgebricksException;
@@ -33,12 +32,7 @@
 public class SerializableAvgAggregateDescriptor extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableAvgAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableAvgAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableCountAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableCountAggregateDescriptor.java
index 99cd053..a00aa86 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableCountAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableCountAggregateDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -35,12 +34,7 @@
 public class SerializableCountAggregateDescriptor extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableCountAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableCountAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalAvgAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalAvgAggregateDescriptor.java
index e7f8845..fbbeecf 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalAvgAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalAvgAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class SerializableGlobalAvgAggregateDescriptor extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableGlobalAvgAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableGlobalAvgAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalKurtosisAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalKurtosisAggregateDescriptor.java
index 5574e54..be3cff9 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalKurtosisAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalKurtosisAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
         extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableGlobalKurtosisAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableGlobalKurtosisAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSkewnessAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSkewnessAggregateDescriptor.java
index 5af0f39..430b01d 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSkewnessAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSkewnessAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
         extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableGlobalSkewnessAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableGlobalSkewnessAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlAvgAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlAvgAggregateDescriptor.java
index bb47742..9812b10 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlAvgAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlAvgAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
         extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableGlobalSqlAvgAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableGlobalSqlAvgAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlKurtosisAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlKurtosisAggregateDescriptor.java
index d24f083..b1ed637 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlKurtosisAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlKurtosisAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
         extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableGlobalSqlKurtosisAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableGlobalSqlKurtosisAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlSkewnessAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlSkewnessAggregateDescriptor.java
index 24eb6d7..bf1eac6 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlSkewnessAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlSkewnessAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
         extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableGlobalSqlSkewnessAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableGlobalSqlSkewnessAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlStddevAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlStddevAggregateDescriptor.java
index 9ec4436..07165d2 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlStddevAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlStddevAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
         extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableGlobalSqlStddevAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableGlobalSqlStddevAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlStddevPopAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlStddevPopAggregateDescriptor.java
index 5ccf863..468d576 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlStddevPopAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlStddevPopAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
         extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableGlobalSqlStddevPopAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableGlobalSqlStddevPopAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlVarAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlVarAggregateDescriptor.java
index 64c3aaf..dedf779 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlVarAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlVarAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
         extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableGlobalSqlVarAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableGlobalSqlVarAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlVarPopAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlVarPopAggregateDescriptor.java
index 366893e..cad2eea 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlVarPopAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlVarPopAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
         extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableGlobalSqlVarPopAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableGlobalSqlVarPopAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalStddevAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalStddevAggregateDescriptor.java
index e5fe639..482b12d 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalStddevAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalStddevAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
         extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableGlobalStddevAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableGlobalStddevAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalStddevPopAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalStddevPopAggregateDescriptor.java
index 86b3cb6..fc83077 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalStddevPopAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalStddevPopAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
         extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableGlobalStddevPopAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableGlobalStddevPopAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalVarAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalVarAggregateDescriptor.java
index da5907d..e8ec6dc 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalVarAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalVarAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class SerializableGlobalVarAggregateDescriptor extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableGlobalVarAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableGlobalVarAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalVarPopAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalVarPopAggregateDescriptor.java
index ea5c5c9..8847605 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalVarPopAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableGlobalVarPopAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
         extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableGlobalVarPopAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableGlobalVarPopAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateAvgAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateAvgAggregateDescriptor.java
index fb95732..3345c46 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateAvgAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateAvgAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
         extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableIntermediateAvgAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableIntermediateAvgAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateKurtosisAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateKurtosisAggregateDescriptor.java
index c02789f..beb7a6e 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateKurtosisAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateKurtosisAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
         extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableIntermediateKurtosisAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableIntermediateKurtosisAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSkewnessAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSkewnessAggregateDescriptor.java
index a760b20..747d115 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSkewnessAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSkewnessAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
         extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableIntermediateSkewnessAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableIntermediateSkewnessAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSqlAvgAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSqlAvgAggregateDescriptor.java
index e4c668d..8c52df1 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSqlAvgAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSqlAvgAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
         extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableIntermediateSqlAvgAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableIntermediateSqlAvgAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSqlKurtosisAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSqlKurtosisAggregateDescriptor.java
index 40aaaec..e0c6d03 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSqlKurtosisAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSqlKurtosisAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,8 @@
         extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableIntermediateSqlKurtosisAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY =
+            SerializableIntermediateSqlKurtosisAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSqlSkewnessAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSqlSkewnessAggregateDescriptor.java
index e8d1709..8563e8c 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSqlSkewnessAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSqlSkewnessAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,8 @@
         extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableIntermediateSqlSkewnessAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY =
+            SerializableIntermediateSqlSkewnessAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSqlStddevAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSqlStddevAggregateDescriptor.java
index b2c396d..d5acc277 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSqlStddevAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSqlStddevAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
         extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableIntermediateSqlStddevAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableIntermediateSqlStddevAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSqlStddevPopAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSqlStddevPopAggregateDescriptor.java
index cc0927e..89b6c8f 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSqlStddevPopAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSqlStddevPopAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,8 @@
         extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableIntermediateSqlStddevPopAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY =
+            SerializableIntermediateSqlStddevPopAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSqlVarAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSqlVarAggregateDescriptor.java
index c8e8bad..52569ce 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSqlVarAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSqlVarAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
         extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableIntermediateSqlVarAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableIntermediateSqlVarAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSqlVarPopAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSqlVarPopAggregateDescriptor.java
index 26a466d..78b08f3 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSqlVarPopAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateSqlVarPopAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
         extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableIntermediateSqlVarPopAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableIntermediateSqlVarPopAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateStddevAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateStddevAggregateDescriptor.java
index f963275..e53bde9 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateStddevAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateStddevAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
         extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableIntermediateStddevAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableIntermediateStddevAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateStddevPopAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateStddevPopAggregateDescriptor.java
index 2bcb057..fecf908 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateStddevPopAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateStddevPopAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
         extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableIntermediateStddevPopAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableIntermediateStddevPopAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateVarAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateVarAggregateDescriptor.java
index e9222b2..04fa186 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateVarAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateVarAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
         extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableIntermediateVarAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableIntermediateVarAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateVarPopAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateVarPopAggregateDescriptor.java
index cf2caae..22bd4ad 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateVarPopAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableIntermediateVarPopAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
         extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableIntermediateVarPopAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableIntermediateVarPopAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableKurtosisAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableKurtosisAggregateDescriptor.java
index 39bdb79..94cc569 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableKurtosisAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableKurtosisAggregateDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.common.exceptions.AlgebricksException;
@@ -33,12 +32,7 @@
 public class SerializableKurtosisAggregateDescriptor extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableKurtosisAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableKurtosisAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalAvgAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalAvgAggregateDescriptor.java
index c14aef7..0300631 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalAvgAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalAvgAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class SerializableLocalAvgAggregateDescriptor extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableLocalAvgAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableLocalAvgAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalKurtosisAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalKurtosisAggregateDescriptor.java
index 76ce6f4..d689d48 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalKurtosisAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalKurtosisAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
         extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableLocalKurtosisAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableLocalKurtosisAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSkewnessAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSkewnessAggregateDescriptor.java
index 51d9c1a..0111e87 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSkewnessAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSkewnessAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
         extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableLocalSkewnessAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableLocalSkewnessAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlAvgAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlAvgAggregateDescriptor.java
index 4db8418..7636c61 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlAvgAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlAvgAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class SerializableLocalSqlAvgAggregateDescriptor extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableLocalSqlAvgAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableLocalSqlAvgAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlKurtosisAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlKurtosisAggregateDescriptor.java
index 04e783d..08525cd 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlKurtosisAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlKurtosisAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
         extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableLocalSqlKurtosisAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableLocalSqlKurtosisAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlSkewnessAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlSkewnessAggregateDescriptor.java
index 2139e6f..f326517 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlSkewnessAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlSkewnessAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
         extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableLocalSqlSkewnessAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableLocalSqlSkewnessAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlStddevAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlStddevAggregateDescriptor.java
index 1efbd50..c5ac171 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlStddevAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlStddevAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
         extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableLocalSqlStddevAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableLocalSqlStddevAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlStddevPopAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlStddevPopAggregateDescriptor.java
index 62cb56a..46236d5 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlStddevPopAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlStddevPopAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
         extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableLocalSqlStddevPopAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableLocalSqlStddevPopAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlVarAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlVarAggregateDescriptor.java
index 1aa9798..460e762 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlVarAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlVarAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class SerializableLocalSqlVarAggregateDescriptor extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableLocalSqlVarAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableLocalSqlVarAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlVarPopAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlVarPopAggregateDescriptor.java
index 146c92a..b71d4d2 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlVarPopAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlVarPopAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
         extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableLocalSqlVarPopAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableLocalSqlVarPopAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalStddevAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalStddevAggregateDescriptor.java
index 1f13577..6c13550 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalStddevAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalStddevAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class SerializableLocalStddevAggregateDescriptor extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableLocalStddevAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableLocalStddevAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalStddevPopAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalStddevPopAggregateDescriptor.java
index a139883..235e646 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalStddevPopAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalStddevPopAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
         extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableLocalStddevPopAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableLocalStddevPopAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalVarAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalVarAggregateDescriptor.java
index d328e55..5e0cdd7 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalVarAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalVarAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class SerializableLocalVarAggregateDescriptor extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableLocalVarAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableLocalVarAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalVarPopAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalVarPopAggregateDescriptor.java
index e7df873..0acb09c 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalVarPopAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableLocalVarPopAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class SerializableLocalVarPopAggregateDescriptor extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableLocalVarPopAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableLocalVarPopAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSkewnessAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSkewnessAggregateDescriptor.java
index d709757..4172571 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSkewnessAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSkewnessAggregateDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.common.exceptions.AlgebricksException;
@@ -33,12 +32,7 @@
 public class SerializableSkewnessAggregateDescriptor extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableSkewnessAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableSkewnessAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlAvgAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlAvgAggregateDescriptor.java
index 9d469b1..5939e49 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlAvgAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlAvgAggregateDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -32,12 +31,7 @@
 public class SerializableSqlAvgAggregateDescriptor extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableSqlAvgAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableSqlAvgAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlCountAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlCountAggregateDescriptor.java
index 1818f07..b4a7620 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlCountAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlCountAggregateDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -35,12 +34,7 @@
 public class SerializableSqlCountAggregateDescriptor extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableSqlCountAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableSqlCountAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlKurtosisAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlKurtosisAggregateDescriptor.java
index 323c26a..bc85ddd 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlKurtosisAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlKurtosisAggregateDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -32,12 +31,7 @@
 public class SerializableSqlKurtosisAggregateDescriptor extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableSqlKurtosisAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableSqlKurtosisAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlSkewnessAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlSkewnessAggregateDescriptor.java
index cf004be..0f72183 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlSkewnessAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlSkewnessAggregateDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -32,12 +31,7 @@
 public class SerializableSqlSkewnessAggregateDescriptor extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableSqlSkewnessAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableSqlSkewnessAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlStddevAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlStddevAggregateDescriptor.java
index 8bef41a..af34674 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlStddevAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlStddevAggregateDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -32,12 +31,7 @@
 public class SerializableSqlStddevAggregateDescriptor extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableSqlStddevAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableSqlStddevAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlStddevPopAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlStddevPopAggregateDescriptor.java
index 7479686..2c6882f 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlStddevPopAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlStddevPopAggregateDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
         extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableSqlStddevPopAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableSqlStddevPopAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlVarAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlVarAggregateDescriptor.java
index ae9e617..bf7c2b8 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlVarAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlVarAggregateDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -32,12 +31,7 @@
 public class SerializableSqlVarAggregateDescriptor extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableSqlVarAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableSqlVarAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlVarPopAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlVarPopAggregateDescriptor.java
index 4d2829e..34fd0da 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlVarPopAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableSqlVarPopAggregateDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -32,12 +31,7 @@
 public class SerializableSqlVarPopAggregateDescriptor extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableSqlVarPopAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableSqlVarPopAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableStddevAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableStddevAggregateDescriptor.java
index ff984f9..7cf0a26 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableStddevAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableStddevAggregateDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.common.exceptions.AlgebricksException;
@@ -33,12 +32,7 @@
 public class SerializableStddevAggregateDescriptor extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableStddevAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableStddevAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableStddevPopAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableStddevPopAggregateDescriptor.java
index 1578acf..1ff7f99 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableStddevPopAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableStddevPopAggregateDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.common.exceptions.AlgebricksException;
@@ -33,12 +32,7 @@
 public class SerializableStddevPopAggregateDescriptor extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableStddevPopAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableStddevPopAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableVarAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableVarAggregateDescriptor.java
index c014c4f..fb6b41c 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableVarAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableVarAggregateDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.common.exceptions.AlgebricksException;
@@ -33,12 +32,7 @@
 public class SerializableVarAggregateDescriptor extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableVarAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableVarAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableVarPopAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableVarPopAggregateDescriptor.java
index 5673539..d3eecbf 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableVarPopAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/serializable/std/SerializableVarPopAggregateDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.runtime.aggregates.serializable.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractSerializableAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.common.exceptions.AlgebricksException;
@@ -33,12 +32,7 @@
 public class SerializableVarPopAggregateDescriptor extends AbstractSerializableAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SerializableVarPopAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SerializableVarPopAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/AvgAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/AvgAggregateDescriptor.java
index a0d06e7..6aa7d73 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/AvgAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/AvgAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class AvgAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new AvgAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = AvgAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/CountAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/CountAggregateDescriptor.java
index 389c3af..8fc8a9f 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/CountAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/CountAggregateDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -35,12 +34,7 @@
 public class CountAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new CountAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = CountAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalAvgAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalAvgAggregateDescriptor.java
index bb15b2d..a1f216d 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalAvgAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalAvgAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new GlobalAvgAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = GlobalAvgAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalKurtosisAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalKurtosisAggregateDescriptor.java
index 107f823..7136c19 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalKurtosisAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalKurtosisAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new GlobalKurtosisAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = GlobalKurtosisAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSkewnessAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSkewnessAggregateDescriptor.java
index 0d3038a..fdb5673 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSkewnessAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSkewnessAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new GlobalSkewnessAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = GlobalSkewnessAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSqlAvgAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSqlAvgAggregateDescriptor.java
index dcbc1a7..677eb9c 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSqlAvgAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSqlAvgAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new GlobalSqlAvgAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = GlobalSqlAvgAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSqlKurtosisAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSqlKurtosisAggregateDescriptor.java
index d4e24bb..d4a3fb7 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSqlKurtosisAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSqlKurtosisAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new GlobalSqlKurtosisAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = GlobalSqlKurtosisAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSqlSkewnessAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSqlSkewnessAggregateDescriptor.java
index 2874c60..f63c256 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSqlSkewnessAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSqlSkewnessAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new GlobalSqlSkewnessAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = GlobalSqlSkewnessAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSqlStddevAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSqlStddevAggregateDescriptor.java
index d81d435..28a090a 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSqlStddevAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSqlStddevAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new GlobalSqlStddevAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = GlobalSqlStddevAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSqlStddevPopAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSqlStddevPopAggregateDescriptor.java
index aeef3d0..1cbfb15 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSqlStddevPopAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSqlStddevPopAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new GlobalSqlStddevPopAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = GlobalSqlStddevPopAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSqlVarAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSqlVarAggregateDescriptor.java
index 5dcaa03..e96cbe8 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSqlVarAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSqlVarAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new GlobalSqlVarAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = GlobalSqlVarAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSqlVarPopAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSqlVarPopAggregateDescriptor.java
index afd6f66..da8c1b6 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSqlVarPopAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalSqlVarPopAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new GlobalSqlVarPopAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = GlobalSqlVarPopAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalStddevAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalStddevAggregateDescriptor.java
index c4d1f38..8a6c90f 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalStddevAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalStddevAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new GlobalStddevAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = GlobalStddevAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalStddevPopAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalStddevPopAggregateDescriptor.java
index 52df8c2..7029ed8 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalStddevPopAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalStddevPopAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new GlobalStddevPopAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = GlobalStddevPopAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalVarAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalVarAggregateDescriptor.java
index 4ade667..2d6087b 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalVarAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalVarAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new GlobalVarAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = GlobalVarAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalVarPopAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalVarPopAggregateDescriptor.java
index 3a8a818..f1225b6 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalVarPopAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/GlobalVarPopAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new GlobalVarPopAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = GlobalVarPopAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateAvgAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateAvgAggregateDescriptor.java
index 8c34eec..2f76d7c 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateAvgAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateAvgAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new IntermediateAvgAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = IntermediateAvgAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateKurtosisAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateKurtosisAggregateDescriptor.java
index 5a62762..67b631f 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateKurtosisAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateKurtosisAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new IntermediateKurtosisAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = IntermediateKurtosisAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSkewnessAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSkewnessAggregateDescriptor.java
index 9cd0b21..d0e2537 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSkewnessAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSkewnessAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new IntermediateSkewnessAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = IntermediateSkewnessAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSqlAvgAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSqlAvgAggregateDescriptor.java
index 54f22ab..535b442 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSqlAvgAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSqlAvgAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class IntermediateSqlAvgAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new IntermediateSqlAvgAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = IntermediateSqlAvgAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSqlKurtosisAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSqlKurtosisAggregateDescriptor.java
index 02b65f2..2ea358d 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSqlKurtosisAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSqlKurtosisAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class IntermediateSqlKurtosisAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new IntermediateSqlKurtosisAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = IntermediateSqlKurtosisAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSqlSkewnessAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSqlSkewnessAggregateDescriptor.java
index a8916f8..02d6f63 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSqlSkewnessAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSqlSkewnessAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class IntermediateSqlSkewnessAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new IntermediateSqlSkewnessAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = IntermediateSqlSkewnessAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSqlStddevAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSqlStddevAggregateDescriptor.java
index 62663a4..0d3ea22 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSqlStddevAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSqlStddevAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class IntermediateSqlStddevAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new IntermediateSqlStddevAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = IntermediateSqlStddevAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSqlStddevPopAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSqlStddevPopAggregateDescriptor.java
index d05e865..6196d5a 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSqlStddevPopAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSqlStddevPopAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class IntermediateSqlStddevPopAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new IntermediateSqlStddevPopAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = IntermediateSqlStddevPopAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSqlVarAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSqlVarAggregateDescriptor.java
index c726870..00f222f 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSqlVarAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSqlVarAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class IntermediateSqlVarAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new IntermediateSqlVarAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = IntermediateSqlVarAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSqlVarPopAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSqlVarPopAggregateDescriptor.java
index 3ac9bff..4abf219 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSqlVarPopAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateSqlVarPopAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class IntermediateSqlVarPopAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new IntermediateSqlVarPopAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = IntermediateSqlVarPopAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateStddevAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateStddevAggregateDescriptor.java
index b0160b4..2fa255e 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateStddevAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateStddevAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new IntermediateStddevAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = IntermediateStddevAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateStddevPopAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateStddevPopAggregateDescriptor.java
index 6409dfc..c83b917 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateStddevPopAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateStddevPopAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new IntermediateStddevPopAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = IntermediateStddevPopAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateVarAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateVarAggregateDescriptor.java
index 003c4e5..1a74d69 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateVarAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateVarAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new IntermediateVarAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = IntermediateVarAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateVarPopAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateVarPopAggregateDescriptor.java
index 4dc8b2e..cbf2434 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateVarPopAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/IntermediateVarPopAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new IntermediateVarPopAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = IntermediateVarPopAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/KurtosisAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/KurtosisAggregateDescriptor.java
index af35c1a..b28f88f 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/KurtosisAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/KurtosisAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class KurtosisAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new KurtosisAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = KurtosisAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalAvgAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalAvgAggregateDescriptor.java
index 2bb25f9..d9a132c 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalAvgAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalAvgAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class LocalAvgAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new LocalAvgAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = LocalAvgAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalKurtosisAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalKurtosisAggregateDescriptor.java
index 3018bcc..6366af8 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalKurtosisAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalKurtosisAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class LocalKurtosisAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new LocalKurtosisAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = LocalKurtosisAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSkewnessAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSkewnessAggregateDescriptor.java
index b23402b..733db0e 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSkewnessAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSkewnessAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class LocalSkewnessAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new LocalSkewnessAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = LocalSkewnessAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSqlAvgAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSqlAvgAggregateDescriptor.java
index f3288c7..bff5a74 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSqlAvgAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSqlAvgAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class LocalSqlAvgAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new LocalSqlAvgAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = LocalSqlAvgAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSqlKurtosisAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSqlKurtosisAggregateDescriptor.java
index c586eb3..081d241 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSqlKurtosisAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSqlKurtosisAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class LocalSqlKurtosisAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new LocalSqlKurtosisAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = LocalSqlKurtosisAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSqlSkewnessAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSqlSkewnessAggregateDescriptor.java
index 366ff89d..cc68a43 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSqlSkewnessAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSqlSkewnessAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class LocalSqlSkewnessAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new LocalSqlSkewnessAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = LocalSqlSkewnessAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSqlStddevAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSqlStddevAggregateDescriptor.java
index cb8dbed..5eb311d 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSqlStddevAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSqlStddevAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class LocalSqlStddevAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new LocalSqlStddevAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = LocalSqlStddevAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSqlStddevPopAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSqlStddevPopAggregateDescriptor.java
index ed60e90..c9bf62f 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSqlStddevPopAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSqlStddevPopAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class LocalSqlStddevPopAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new LocalSqlStddevPopAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = LocalSqlStddevPopAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSqlVarAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSqlVarAggregateDescriptor.java
index fa0052e..98aadc7 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSqlVarAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSqlVarAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class LocalSqlVarAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new LocalSqlVarAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = LocalSqlVarAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSqlVarPopAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSqlVarPopAggregateDescriptor.java
index f8f27a3..305defa 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSqlVarPopAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalSqlVarPopAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class LocalSqlVarPopAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new LocalSqlVarPopAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = LocalSqlVarPopAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalStddevAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalStddevAggregateDescriptor.java
index 8d3509f..4e85e66 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalStddevAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalStddevAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class LocalStddevAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new LocalStddevAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = LocalStddevAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalStddevPopAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalStddevPopAggregateDescriptor.java
index cc17a33..29febfa 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalStddevPopAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalStddevPopAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class LocalStddevPopAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new LocalStddevPopAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = LocalStddevPopAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalVarAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalVarAggregateDescriptor.java
index 288f8f9..bdb4753 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalVarAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalVarAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class LocalVarAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new LocalVarAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = LocalVarAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalVarPopAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalVarPopAggregateDescriptor.java
index a0fedbe..495b1ef 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalVarPopAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/LocalVarPopAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class LocalVarPopAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new LocalVarPopAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = LocalVarPopAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SkewnessAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SkewnessAggregateDescriptor.java
index 98eef28..e762c42 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SkewnessAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SkewnessAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class SkewnessAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SkewnessAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SkewnessAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlAvgAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlAvgAggregateDescriptor.java
index da10cf6..213c708 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlAvgAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlAvgAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class SqlAvgAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SqlAvgAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SqlAvgAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlCountAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlCountAggregateDescriptor.java
index 1155bd5..f10dcc9 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlCountAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlCountAggregateDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -35,12 +34,7 @@
 public class SqlCountAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SqlCountAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SqlCountAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlKurtosisAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlKurtosisAggregateDescriptor.java
index 7429542..53f5a1d 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlKurtosisAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlKurtosisAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class SqlKurtosisAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SqlKurtosisAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SqlKurtosisAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlSkewnessAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlSkewnessAggregateDescriptor.java
index 885608e..e17ec66 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlSkewnessAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlSkewnessAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class SqlSkewnessAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SqlSkewnessAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SqlSkewnessAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlStddevAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlStddevAggregateDescriptor.java
index 360cdf3..6e29775 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlStddevAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlStddevAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class SqlStddevAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SqlStddevAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SqlStddevAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlStddevPopAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlStddevPopAggregateDescriptor.java
index 6f896b4..4424857 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlStddevPopAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlStddevPopAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class SqlStddevPopAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SqlStddevPopAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SqlStddevPopAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlVarAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlVarAggregateDescriptor.java
index deefa55..1f9c0b7 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlVarAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlVarAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class SqlVarAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SqlVarAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SqlVarAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlVarPopAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlVarPopAggregateDescriptor.java
index c24bf94..d7eb353 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlVarPopAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/SqlVarPopAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class SqlVarPopAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SqlVarPopAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SqlVarPopAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/StddevAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/StddevAggregateDescriptor.java
index 011efcc..ef3d9f9 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/StddevAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/StddevAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class StddevAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new StddevAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = StddevAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/StddevPopAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/StddevPopAggregateDescriptor.java
index 8fba9e5..ea6f209 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/StddevPopAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/StddevPopAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class StddevPopAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new StddevPopAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = StddevPopAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/VarAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/VarAggregateDescriptor.java
index 37f0ee6..23dac92 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/VarAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/VarAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class VarAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new VarAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = VarAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/VarPopAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/VarPopAggregateDescriptor.java
index 0eeb7b3..45051d4 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/VarPopAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/std/VarPopAggregateDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.aggregates.std;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class VarPopAggregateDescriptor extends AbstractAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new VarPopAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = VarPopAggregateDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/stream/EmptyStreamAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/stream/EmptyStreamAggregateDescriptor.java
index dead68b..40abd72 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/stream/EmptyStreamAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/stream/EmptyStreamAggregateDescriptor.java
@@ -21,7 +21,6 @@
 import org.apache.asterix.formats.nontagged.SerializerDeserializerProvider;
 import org.apache.asterix.om.base.ABoolean;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.BuiltinType;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
@@ -42,12 +41,7 @@
     private static final long serialVersionUID = 1L;
 
     public final static FunctionIdentifier FID = BuiltinFunctions.EMPTY_STREAM;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new EmptyStreamAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = EmptyStreamAggregateDescriptor::new;
 
     @Override
     public IAggregateEvaluatorFactory createAggregateEvaluatorFactory(IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/stream/NonEmptyStreamAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/stream/NonEmptyStreamAggregateDescriptor.java
index d28c7c2..7bc366e 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/stream/NonEmptyStreamAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/aggregates/stream/NonEmptyStreamAggregateDescriptor.java
@@ -21,7 +21,6 @@
 import org.apache.asterix.formats.nontagged.SerializerDeserializerProvider;
 import org.apache.asterix.om.base.ABoolean;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.BuiltinType;
 import org.apache.asterix.runtime.aggregates.base.AbstractAggregateFunctionDynamicDescriptor;
@@ -41,12 +40,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new NonEmptyStreamAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = NonEmptyStreamAggregateDescriptor::new;
 
     @Override
     public IAggregateEvaluatorFactory createAggregateEvaluatorFactory(IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/CircleCenterAccessor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/CircleCenterAccessor.java
index 23795dc..1a3e81b 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/CircleCenterAccessor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/CircleCenterAccessor.java
@@ -29,7 +29,6 @@
 import org.apache.asterix.om.base.AMutablePoint;
 import org.apache.asterix.om.base.APoint;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -52,13 +51,7 @@
 
     private static final long serialVersionUID = 1L;
     private static final FunctionIdentifier FID = BuiltinFunctions.GET_CIRCLE_CENTER_ACCESSOR;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new CircleCenterAccessor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = CircleCenterAccessor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/CircleRadiusAccessor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/CircleRadiusAccessor.java
index 39484ae..e653813 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/CircleRadiusAccessor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/CircleRadiusAccessor.java
@@ -28,7 +28,6 @@
 import org.apache.asterix.om.base.ADouble;
 import org.apache.asterix.om.base.AMutableDouble;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -50,13 +49,7 @@
 public class CircleRadiusAccessor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
     private static final FunctionIdentifier FID = BuiltinFunctions.GET_CIRCLE_RADIUS_ACCESSOR;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new CircleRadiusAccessor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = CircleRadiusAccessor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/LineRectanglePolygonAccessor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/LineRectanglePolygonAccessor.java
index a7f8500..03a63cc 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/LineRectanglePolygonAccessor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/LineRectanglePolygonAccessor.java
@@ -33,7 +33,6 @@
 import org.apache.asterix.om.base.AMutablePoint;
 import org.apache.asterix.om.base.APoint;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.AOrderedListType;
 import org.apache.asterix.om.types.ATypeTag;
@@ -57,13 +56,7 @@
 public class LineRectanglePolygonAccessor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
     private static final FunctionIdentifier FID = BuiltinFunctions.GET_POINTS_LINE_RECTANGLE_POLYGON_ACCESSOR;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new LineRectanglePolygonAccessor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = LineRectanglePolygonAccessor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/PointXCoordinateAccessor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/PointXCoordinateAccessor.java
index 6bcb936..2167f22 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/PointXCoordinateAccessor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/PointXCoordinateAccessor.java
@@ -29,7 +29,6 @@
 import org.apache.asterix.om.base.ADouble;
 import org.apache.asterix.om.base.AMutableDouble;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -51,13 +50,7 @@
 public class PointXCoordinateAccessor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
     private static final FunctionIdentifier FID = BuiltinFunctions.GET_POINT_X_COORDINATE_ACCESSOR;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new PointXCoordinateAccessor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = PointXCoordinateAccessor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/PointYCoordinateAccessor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/PointYCoordinateAccessor.java
index 3c32e51..e1b8e83 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/PointYCoordinateAccessor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/PointYCoordinateAccessor.java
@@ -29,7 +29,6 @@
 import org.apache.asterix.om.base.ADouble;
 import org.apache.asterix.om.base.AMutableDouble;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -54,13 +53,7 @@
 
     private static final FunctionIdentifier FID = BuiltinFunctions.GET_POINT_Y_COORDINATE_ACCESSOR;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new PointYCoordinateAccessor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = PointYCoordinateAccessor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalDayAccessor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalDayAccessor.java
index 9ea0954..aa09e2d 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalDayAccessor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalDayAccessor.java
@@ -31,7 +31,6 @@
 import org.apache.asterix.om.base.AMutableInt64;
 import org.apache.asterix.om.base.temporal.GregorianCalendarSystem;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -54,13 +53,7 @@
 
     private static final long serialVersionUID = 1L;
     private static final FunctionIdentifier FID = BuiltinFunctions.ACCESSOR_TEMPORAL_DAY;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new TemporalDayAccessor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = TemporalDayAccessor::new;
 
     /* (non-Javadoc)
      * @see org.apache.asterix.om.function.IFunctionDescriptor#createEvaluatorFactory(org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory[])
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalHourAccessor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalHourAccessor.java
index a53f35e..77485ae 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalHourAccessor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalHourAccessor.java
@@ -31,7 +31,6 @@
 import org.apache.asterix.om.base.AMutableInt64;
 import org.apache.asterix.om.base.temporal.GregorianCalendarSystem;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -54,14 +53,7 @@
 
     private static final long serialVersionUID = 1L;
     private static final FunctionIdentifier FID = BuiltinFunctions.ACCESSOR_TEMPORAL_HOUR;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new TemporalHourAccessor();
-        }
-
-    };
+    public static final IFunctionDescriptorFactory FACTORY = TemporalHourAccessor::new;
 
     /* (non-Javadoc)
      * @see org.apache.asterix.om.function.IFunctionDescriptor#createEvaluatorFactory(org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory[])
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalIntervalEndAccessor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalIntervalEndAccessor.java
index 1dcb45b..6dd9efe 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalIntervalEndAccessor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalIntervalEndAccessor.java
@@ -31,7 +31,6 @@
 import org.apache.asterix.om.base.AMutableTime;
 import org.apache.asterix.om.base.ATime;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -55,13 +54,7 @@
 
     private static final long serialVersionUID = 1L;
     private static final FunctionIdentifier FID = BuiltinFunctions.ACCESSOR_TEMPORAL_INTERVAL_END;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new TemporalIntervalEndAccessor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = TemporalIntervalEndAccessor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalIntervalEndDateAccessor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalIntervalEndDateAccessor.java
index bc9b393..5afcd9c 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalIntervalEndDateAccessor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalIntervalEndDateAccessor.java
@@ -27,7 +27,6 @@
 import org.apache.asterix.om.base.ADate;
 import org.apache.asterix.om.base.AMutableDate;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -50,13 +49,7 @@
 public class TemporalIntervalEndDateAccessor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
     private static final FunctionIdentifier FID = BuiltinFunctions.ACCESSOR_TEMPORAL_INTERVAL_END_DATE;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new TemporalIntervalEndDateAccessor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = TemporalIntervalEndDateAccessor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalIntervalEndDatetimeAccessor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalIntervalEndDatetimeAccessor.java
index 3faef26..cb060fc 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalIntervalEndDatetimeAccessor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalIntervalEndDatetimeAccessor.java
@@ -27,7 +27,6 @@
 import org.apache.asterix.om.base.ADateTime;
 import org.apache.asterix.om.base.AMutableDateTime;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -52,13 +51,7 @@
     private static final long serialVersionUID = 1L;
 
     private static final FunctionIdentifier FID = BuiltinFunctions.ACCESSOR_TEMPORAL_INTERVAL_END_DATETIME;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new TemporalIntervalEndDatetimeAccessor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = TemporalIntervalEndDatetimeAccessor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalIntervalEndTimeAccessor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalIntervalEndTimeAccessor.java
index ed1962c..05833b3 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalIntervalEndTimeAccessor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalIntervalEndTimeAccessor.java
@@ -27,7 +27,6 @@
 import org.apache.asterix.om.base.AMutableTime;
 import org.apache.asterix.om.base.ATime;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -50,13 +49,7 @@
 public class TemporalIntervalEndTimeAccessor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
     private static final FunctionIdentifier FID = BuiltinFunctions.ACCESSOR_TEMPORAL_INTERVAL_END_TIME;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new TemporalIntervalEndTimeAccessor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = TemporalIntervalEndTimeAccessor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalIntervalStartAccessor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalIntervalStartAccessor.java
index e2df591..74fdc76 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalIntervalStartAccessor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalIntervalStartAccessor.java
@@ -31,7 +31,6 @@
 import org.apache.asterix.om.base.AMutableTime;
 import org.apache.asterix.om.base.ATime;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -55,13 +54,7 @@
 
     private static final long serialVersionUID = 1L;
     private static final FunctionIdentifier FID = BuiltinFunctions.ACCESSOR_TEMPORAL_INTERVAL_START;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new TemporalIntervalStartAccessor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = TemporalIntervalStartAccessor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalIntervalStartDateAccessor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalIntervalStartDateAccessor.java
index 57e2730..f0f07ef 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalIntervalStartDateAccessor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalIntervalStartDateAccessor.java
@@ -29,7 +29,6 @@
 import org.apache.asterix.om.base.ADate;
 import org.apache.asterix.om.base.AMutableDate;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -53,13 +52,7 @@
 
     private static final long serialVersionUID = 1L;
     private static final FunctionIdentifier FID = BuiltinFunctions.ACCESSOR_TEMPORAL_INTERVAL_START_DATE;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new TemporalIntervalStartDateAccessor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = TemporalIntervalStartDateAccessor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalIntervalStartDatetimeAccessor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalIntervalStartDatetimeAccessor.java
index be6787f..d5aa67d 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalIntervalStartDatetimeAccessor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalIntervalStartDatetimeAccessor.java
@@ -27,7 +27,6 @@
 import org.apache.asterix.om.base.ADateTime;
 import org.apache.asterix.om.base.AMutableDateTime;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -50,13 +49,7 @@
 public class TemporalIntervalStartDatetimeAccessor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
     private static final FunctionIdentifier FID = BuiltinFunctions.ACCESSOR_TEMPORAL_INTERVAL_START_DATETIME;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new TemporalIntervalStartDatetimeAccessor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = TemporalIntervalStartDatetimeAccessor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalIntervalStartTimeAccessor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalIntervalStartTimeAccessor.java
index ee86f64..43b1757 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalIntervalStartTimeAccessor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalIntervalStartTimeAccessor.java
@@ -27,7 +27,6 @@
 import org.apache.asterix.om.base.AMutableTime;
 import org.apache.asterix.om.base.ATime;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -51,13 +50,7 @@
 
     private static final long serialVersionUID = 1L;
     private static final FunctionIdentifier FID = BuiltinFunctions.ACCESSOR_TEMPORAL_INTERVAL_START_TIME;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new TemporalIntervalStartTimeAccessor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = TemporalIntervalStartTimeAccessor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalMillisecondAccessor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalMillisecondAccessor.java
index 08e1484..78fac67 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalMillisecondAccessor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalMillisecondAccessor.java
@@ -31,7 +31,6 @@
 import org.apache.asterix.om.base.AMutableInt64;
 import org.apache.asterix.om.base.temporal.GregorianCalendarSystem;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -53,14 +52,7 @@
 public class TemporalMillisecondAccessor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
     private static final FunctionIdentifier FID = BuiltinFunctions.ACCESSOR_TEMPORAL_MILLISEC;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new TemporalMillisecondAccessor();
-        }
-
-    };
+    public static final IFunctionDescriptorFactory FACTORY = TemporalMillisecondAccessor::new;
 
     /* (non-Javadoc)
      * @see org.apache.asterix.runtime.base.IScalarFunctionDynamicDescriptor#createEvaluatorFactory(org.apache.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory[])
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalMinuteAccessor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalMinuteAccessor.java
index 512b82e..987a0b9 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalMinuteAccessor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalMinuteAccessor.java
@@ -31,7 +31,6 @@
 import org.apache.asterix.om.base.AMutableInt64;
 import org.apache.asterix.om.base.temporal.GregorianCalendarSystem;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -56,14 +55,7 @@
 
     private static final FunctionIdentifier FID = BuiltinFunctions.ACCESSOR_TEMPORAL_MIN;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new TemporalMinuteAccessor();
-        }
-
-    };
+    public static final IFunctionDescriptorFactory FACTORY = TemporalMinuteAccessor::new;
 
     /* (non-Javadoc)
      * @see org.apache.asterix.runtime.base.IScalarFunctionDynamicDescriptor#createEvaluatorFactory(org.apache.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory[])
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalMonthAccessor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalMonthAccessor.java
index 0dde65c..de2f8ac 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalMonthAccessor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalMonthAccessor.java
@@ -31,7 +31,6 @@
 import org.apache.asterix.om.base.AMutableInt64;
 import org.apache.asterix.om.base.temporal.GregorianCalendarSystem;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -53,14 +52,7 @@
 public class TemporalMonthAccessor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
     private static final FunctionIdentifier FID = BuiltinFunctions.ACCESSOR_TEMPORAL_MONTH;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new TemporalMonthAccessor();
-        }
-
-    };
+    public static final IFunctionDescriptorFactory FACTORY = TemporalMonthAccessor::new;
 
     /* (non-Javadoc)
      * @see org.apache.asterix.runtime.base.IScalarFunctionDynamicDescriptor#createEvaluatorFactory(org.apache.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory[])
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalSecondAccessor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalSecondAccessor.java
index fcd952d..2aae1fb 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalSecondAccessor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalSecondAccessor.java
@@ -31,7 +31,6 @@
 import org.apache.asterix.om.base.AMutableInt64;
 import org.apache.asterix.om.base.temporal.GregorianCalendarSystem;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -53,14 +52,7 @@
 public class TemporalSecondAccessor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
     private static final FunctionIdentifier FID = BuiltinFunctions.ACCESSOR_TEMPORAL_SEC;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new TemporalSecondAccessor();
-        }
-
-    };
+    public static final IFunctionDescriptorFactory FACTORY = TemporalSecondAccessor::new;
 
     /* (non-Javadoc)
      * @see org.apache.asterix.runtime.base.IScalarFunctionDynamicDescriptor#createEvaluatorFactory(org.apache.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory[])
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalYearAccessor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalYearAccessor.java
index be3615f..182b2f4 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalYearAccessor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/accessors/TemporalYearAccessor.java
@@ -31,7 +31,6 @@
 import org.apache.asterix.om.base.AMutableInt64;
 import org.apache.asterix.om.base.temporal.GregorianCalendarSystem;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -55,13 +54,7 @@
 public class TemporalYearAccessor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
     private static final FunctionIdentifier FID = BuiltinFunctions.ACCESSOR_TEMPORAL_YEAR;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new TemporalYearAccessor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = TemporalYearAccessor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ABinaryBase64StringConstructorDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ABinaryBase64StringConstructorDescriptor.java
index 737fcb7..3f2f68a 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ABinaryBase64StringConstructorDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ABinaryBase64StringConstructorDescriptor.java
@@ -21,7 +21,6 @@
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.base.AMutableBinary;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -35,12 +34,7 @@
 @MissingNullInOutFunction
 public class ABinaryBase64StringConstructorDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new ABinaryBase64StringConstructorDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = ABinaryBase64StringConstructorDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ABinaryHexStringConstructorDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ABinaryHexStringConstructorDescriptor.java
index 04bf5be..404258a 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ABinaryHexStringConstructorDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ABinaryHexStringConstructorDescriptor.java
@@ -22,7 +22,6 @@
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.base.AMutableBinary;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -36,12 +35,7 @@
 @MissingNullInOutFunction
 public class ABinaryHexStringConstructorDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new ABinaryHexStringConstructorDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = ABinaryHexStringConstructorDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ABooleanConstructorDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ABooleanConstructorDescriptor.java
index 977524c..be5e3f1 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ABooleanConstructorDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ABooleanConstructorDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -32,12 +31,7 @@
 @MissingNullInOutFunction
 public class ABooleanConstructorDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new ABooleanConstructorDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = ABooleanConstructorDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ACircleConstructorDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ACircleConstructorDescriptor.java
index 58daa47..5891798 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ACircleConstructorDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ACircleConstructorDescriptor.java
@@ -27,7 +27,6 @@
 import org.apache.asterix.om.base.AMutableCircle;
 import org.apache.asterix.om.base.AMutablePoint;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -51,12 +50,7 @@
 public class ACircleConstructorDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new ACircleConstructorDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = ACircleConstructorDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ADateConstructorDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ADateConstructorDescriptor.java
index 12ab1a9..b9a4590 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ADateConstructorDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ADateConstructorDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -32,12 +31,7 @@
 @MissingNullInOutFunction
 public class ADateConstructorDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new ADateConstructorDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = ADateConstructorDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ADateTimeConstructorDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ADateTimeConstructorDescriptor.java
index 323ffcf..025281c 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ADateTimeConstructorDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ADateTimeConstructorDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -32,12 +31,7 @@
 @MissingNullInOutFunction
 public class ADateTimeConstructorDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new ADateTimeConstructorDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = ADateTimeConstructorDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ADayTimeDurationConstructorDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ADayTimeDurationConstructorDescriptor.java
index c7d4a34..6178bc9 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ADayTimeDurationConstructorDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ADayTimeDurationConstructorDescriptor.java
@@ -26,7 +26,6 @@
 import org.apache.asterix.om.base.temporal.ADurationParserFactory;
 import org.apache.asterix.om.base.temporal.ADurationParserFactory.ADurationParseOption;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -45,13 +44,7 @@
 public class ADayTimeDurationConstructorDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new ADayTimeDurationConstructorDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = ADayTimeDurationConstructorDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ADoubleConstructorDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ADoubleConstructorDescriptor.java
index b67382e..c85cff3 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ADoubleConstructorDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ADoubleConstructorDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -32,12 +31,7 @@
 @MissingNullInOutFunction
 public class ADoubleConstructorDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new ADoubleConstructorDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = ADoubleConstructorDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ADurationConstructorDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ADurationConstructorDescriptor.java
index cc3fec8..6a14031 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ADurationConstructorDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ADurationConstructorDescriptor.java
@@ -27,7 +27,6 @@
 import org.apache.asterix.om.base.temporal.ADurationParserFactory;
 import org.apache.asterix.om.base.temporal.ADurationParserFactory.ADurationParseOption;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -45,12 +44,7 @@
 @MissingNullInOutFunction
 public class ADurationConstructorDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new ADurationConstructorDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = ADurationConstructorDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AFloatConstructorDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AFloatConstructorDescriptor.java
index 5596be6..0d443c7 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AFloatConstructorDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AFloatConstructorDescriptor.java
@@ -26,7 +26,6 @@
 import org.apache.asterix.om.base.AFloat;
 import org.apache.asterix.om.base.AMutableFloat;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -46,12 +45,7 @@
 @MissingNullInOutFunction
 public class AFloatConstructorDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new AFloatConstructorDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = AFloatConstructorDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AInt16ConstructorDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AInt16ConstructorDescriptor.java
index 7aedcc0..f8f1537 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AInt16ConstructorDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AInt16ConstructorDescriptor.java
@@ -26,7 +26,6 @@
 import org.apache.asterix.om.base.AInt16;
 import org.apache.asterix.om.base.AMutableInt16;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -47,12 +46,7 @@
 public class AInt16ConstructorDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new AInt16ConstructorDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = AInt16ConstructorDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AInt32ConstructorDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AInt32ConstructorDescriptor.java
index 06512aa..da1d3ba 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AInt32ConstructorDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AInt32ConstructorDescriptor.java
@@ -26,7 +26,6 @@
 import org.apache.asterix.om.base.AInt32;
 import org.apache.asterix.om.base.AMutableInt32;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -46,12 +45,7 @@
 @MissingNullInOutFunction
 public class AInt32ConstructorDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new AInt32ConstructorDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = AInt32ConstructorDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AInt64ConstructorDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AInt64ConstructorDescriptor.java
index fface7b..e46b5b0 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AInt64ConstructorDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AInt64ConstructorDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -32,12 +31,7 @@
 @MissingNullInOutFunction
 public class AInt64ConstructorDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new AInt64ConstructorDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = AInt64ConstructorDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AInt8ConstructorDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AInt8ConstructorDescriptor.java
index 5ee0186..2305eef 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AInt8ConstructorDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AInt8ConstructorDescriptor.java
@@ -26,7 +26,6 @@
 import org.apache.asterix.om.base.AInt8;
 import org.apache.asterix.om.base.AMutableInt8;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -46,12 +45,7 @@
 @MissingNullInOutFunction
 public class AInt8ConstructorDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new AInt8ConstructorDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = AInt8ConstructorDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AIntervalConstructorDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AIntervalConstructorDescriptor.java
index f548626..2c44692 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AIntervalConstructorDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AIntervalConstructorDescriptor.java
@@ -29,7 +29,6 @@
 import org.apache.asterix.om.base.AInterval;
 import org.apache.asterix.om.base.AMutableInterval;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -54,12 +53,7 @@
 public class AIntervalConstructorDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
     public final static FunctionIdentifier FID = BuiltinFunctions.INTERVAL_CONSTRUCTOR;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new AIntervalConstructorDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = AIntervalConstructorDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AIntervalStartFromDateConstructorDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AIntervalStartFromDateConstructorDescriptor.java
index a95e474..6654166 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AIntervalStartFromDateConstructorDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AIntervalStartFromDateConstructorDescriptor.java
@@ -36,7 +36,6 @@
 import org.apache.asterix.om.base.temporal.DurationArithmeticOperations;
 import org.apache.asterix.om.base.temporal.GregorianCalendarSystem;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -61,12 +60,7 @@
 
     private static final long serialVersionUID = 1L;
     public final static FunctionIdentifier FID = BuiltinFunctions.INTERVAL_CONSTRUCTOR_START_FROM_DATE;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new AIntervalStartFromDateConstructorDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = AIntervalStartFromDateConstructorDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AIntervalStartFromDateTimeConstructorDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AIntervalStartFromDateTimeConstructorDescriptor.java
index 11e850c..1fa1242 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AIntervalStartFromDateTimeConstructorDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AIntervalStartFromDateTimeConstructorDescriptor.java
@@ -36,7 +36,6 @@
 import org.apache.asterix.om.base.temporal.ATimeParserFactory;
 import org.apache.asterix.om.base.temporal.DurationArithmeticOperations;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -60,12 +59,7 @@
 public class AIntervalStartFromDateTimeConstructorDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
     public final static FunctionIdentifier FID = BuiltinFunctions.INTERVAL_CONSTRUCTOR_START_FROM_DATETIME;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new AIntervalStartFromDateTimeConstructorDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = AIntervalStartFromDateTimeConstructorDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AIntervalStartFromTimeConstructorDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AIntervalStartFromTimeConstructorDescriptor.java
index 881fed0..40dfb67 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AIntervalStartFromTimeConstructorDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AIntervalStartFromTimeConstructorDescriptor.java
@@ -35,7 +35,6 @@
 import org.apache.asterix.om.base.temporal.DurationArithmeticOperations;
 import org.apache.asterix.om.base.temporal.GregorianCalendarSystem;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -59,12 +58,7 @@
 public class AIntervalStartFromTimeConstructorDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
     public final static FunctionIdentifier FID = BuiltinFunctions.INTERVAL_CONSTRUCTOR_START_FROM_TIME;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new AIntervalStartFromTimeConstructorDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = AIntervalStartFromTimeConstructorDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ALineConstructorDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ALineConstructorDescriptor.java
index 9101223..853e538 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ALineConstructorDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ALineConstructorDescriptor.java
@@ -27,7 +27,6 @@
 import org.apache.asterix.om.base.AMutableLine;
 import org.apache.asterix.om.base.AMutablePoint;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -51,12 +50,7 @@
 public class ALineConstructorDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new ALineConstructorDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = ALineConstructorDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/APoint3DConstructorDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/APoint3DConstructorDescriptor.java
index 4d627fb..34d0b9f 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/APoint3DConstructorDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/APoint3DConstructorDescriptor.java
@@ -26,7 +26,6 @@
 import org.apache.asterix.om.base.AMutablePoint3D;
 import org.apache.asterix.om.base.APoint3D;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -50,12 +49,7 @@
 public class APoint3DConstructorDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new APoint3DConstructorDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = APoint3DConstructorDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/APointConstructorDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/APointConstructorDescriptor.java
index 47d2b11..abf62d8 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/APointConstructorDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/APointConstructorDescriptor.java
@@ -26,7 +26,6 @@
 import org.apache.asterix.om.base.AMutablePoint;
 import org.apache.asterix.om.base.APoint;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -49,12 +48,7 @@
 @MissingNullInOutFunction
 public class APointConstructorDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new APointConstructorDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = APointConstructorDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/APolygonConstructorDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/APolygonConstructorDescriptor.java
index 61008c3..41e8bc7 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/APolygonConstructorDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/APolygonConstructorDescriptor.java
@@ -25,7 +25,6 @@
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.dataflow.data.nontagged.serde.APointSerializerDeserializer;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
@@ -50,12 +49,7 @@
     private static final Pattern WS = Pattern.compile("\\s+");
     private static final Pattern COMMA = Pattern.compile(",");
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new APolygonConstructorDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = APolygonConstructorDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ARectangleConstructorDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ARectangleConstructorDescriptor.java
index 6eed606..729fc4f 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ARectangleConstructorDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ARectangleConstructorDescriptor.java
@@ -27,7 +27,6 @@
 import org.apache.asterix.om.base.AMutableRectangle;
 import org.apache.asterix.om.base.ARectangle;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -50,12 +49,7 @@
 @MissingNullInOutFunction
 public class ARectangleConstructorDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new ARectangleConstructorDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = ARectangleConstructorDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AStringConstructorDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AStringConstructorDescriptor.java
index f2fda66..93fe469 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AStringConstructorDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AStringConstructorDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 public class AStringConstructorDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new AStringConstructorDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = AStringConstructorDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ATimeConstructorDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ATimeConstructorDescriptor.java
index b621441..d648ce3 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ATimeConstructorDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/ATimeConstructorDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -32,12 +31,7 @@
 @MissingNullInOutFunction
 public class ATimeConstructorDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new ATimeConstructorDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = ATimeConstructorDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AYearMonthDurationConstructorDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AYearMonthDurationConstructorDescriptor.java
index d423559..5a64f28 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AYearMonthDurationConstructorDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/constructors/AYearMonthDurationConstructorDescriptor.java
@@ -26,7 +26,6 @@
 import org.apache.asterix.om.base.temporal.ADurationParserFactory;
 import org.apache.asterix.om.base.temporal.ADurationParserFactory.ADurationParseOption;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -44,13 +43,7 @@
 @MissingNullInOutFunction
 public class AYearMonthDurationConstructorDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new AYearMonthDurationConstructorDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = AYearMonthDurationConstructorDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/AndDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/AndDescriptor.java
index a0c28b9..ef9c77b 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/AndDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/AndDescriptor.java
@@ -26,7 +26,6 @@
 import org.apache.asterix.om.base.AMissing;
 import org.apache.asterix.om.base.ANull;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -45,12 +44,7 @@
 
 public class AndDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new AndDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = AndDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/AnyCollectionMemberDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/AnyCollectionMemberDescriptor.java
index 734966e..d2dcb9e 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/AnyCollectionMemberDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/AnyCollectionMemberDescriptor.java
@@ -24,7 +24,6 @@
 import org.apache.asterix.dataflow.data.nontagged.serde.AOrderedListSerializerDeserializer;
 import org.apache.asterix.dataflow.data.nontagged.serde.AUnorderedListSerializerDeserializer;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.EnumDeserializer;
@@ -44,12 +43,7 @@
 public class AnyCollectionMemberDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new AnyCollectionMemberDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = AnyCollectionMemberDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/ArrayIfNullDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/ArrayIfNullDescriptor.java
index aa0b567..2f66203 100755
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/ArrayIfNullDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/ArrayIfNullDescriptor.java
@@ -24,7 +24,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
@@ -59,12 +58,7 @@
 public class ArrayIfNullDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new ArrayIfNullDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = ArrayIfNullDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/CheckUnknownDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/CheckUnknownDescriptor.java
index 88be867..ee6883e 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/CheckUnknownDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/CheckUnknownDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
@@ -42,12 +41,7 @@
 public class CheckUnknownDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new CheckUnknownDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = CheckUnknownDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/CreateCircleDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/CreateCircleDescriptor.java
index c45f90c..b92bc11 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/CreateCircleDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/CreateCircleDescriptor.java
@@ -30,7 +30,6 @@
 import org.apache.asterix.om.base.AMutableCircle;
 import org.apache.asterix.om.base.AMutablePoint;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -52,12 +51,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new CreateCircleDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = CreateCircleDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/CreateLineDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/CreateLineDescriptor.java
index efcce7a..233d8f2 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/CreateLineDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/CreateLineDescriptor.java
@@ -30,7 +30,6 @@
 import org.apache.asterix.om.base.AMutableLine;
 import org.apache.asterix.om.base.AMutablePoint;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -52,12 +51,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new CreateLineDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = CreateLineDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/CreateMBRDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/CreateMBRDescriptor.java
index 4048802..8266199 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/CreateMBRDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/CreateMBRDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.asterix.runtime.evaluators.common.CreateMBREvalFactory;
@@ -31,11 +30,7 @@
 public class CreateMBRDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new CreateMBRDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = CreateMBRDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/CreatePointDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/CreatePointDescriptor.java
index 200c16c..a1c9b69 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/CreatePointDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/CreatePointDescriptor.java
@@ -27,7 +27,6 @@
 import org.apache.asterix.om.base.AMutablePoint;
 import org.apache.asterix.om.base.APoint;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -47,12 +46,7 @@
 @MissingNullInOutFunction
 public class CreatePointDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new CreatePointDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = CreatePointDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/CreatePolygonDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/CreatePolygonDescriptor.java
index 2792f3c..11d776c 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/CreatePolygonDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/CreatePolygonDescriptor.java
@@ -28,7 +28,6 @@
 import org.apache.asterix.om.base.AMissing;
 import org.apache.asterix.om.base.ANull;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -52,12 +51,7 @@
 public class CreatePolygonDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new CreatePolygonDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = CreatePolygonDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/CreateRectangleDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/CreateRectangleDescriptor.java
index 054d477..779cb7b 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/CreateRectangleDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/CreateRectangleDescriptor.java
@@ -30,7 +30,6 @@
 import org.apache.asterix.om.base.AMutableRectangle;
 import org.apache.asterix.om.base.ARectangle;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -52,12 +51,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new CreateRectangleDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = CreateRectangleDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/CreateUUIDDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/CreateUUIDDescriptor.java
index e895ddb..ffa0155 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/CreateUUIDDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/CreateUUIDDescriptor.java
@@ -24,7 +24,6 @@
 import org.apache.asterix.om.base.AGeneratedUUID;
 import org.apache.asterix.om.base.AUUID;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.BuiltinType;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
@@ -42,12 +41,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new CreateUUIDDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = CreateUUIDDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/GetItemDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/GetItemDescriptor.java
index fb71eae..86204f0 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/GetItemDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/GetItemDescriptor.java
@@ -24,7 +24,6 @@
 import org.apache.asterix.dataflow.data.nontagged.serde.AOrderedListSerializerDeserializer;
 import org.apache.asterix.dataflow.data.nontagged.serde.AUnorderedListSerializerDeserializer;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.EnumDeserializer;
@@ -46,12 +45,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new GetItemDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = GetItemDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/GetJobParameterByNameDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/GetJobParameterByNameDescriptor.java
index ce781fb..6201218 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/GetJobParameterByNameDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/GetJobParameterByNameDescriptor.java
@@ -22,7 +22,6 @@
 import java.io.IOException;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -35,12 +34,7 @@
 
 public class GetJobParameterByNameDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new GetJobParameterByNameDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = GetJobParameterByNameDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/InjectFailureDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/InjectFailureDescriptor.java
index 075c707..e70aaa8 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/InjectFailureDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/InjectFailureDescriptor.java
@@ -22,7 +22,6 @@
 import org.apache.asterix.common.exceptions.RuntimeDataException;
 import org.apache.asterix.dataflow.data.nontagged.serde.ABooleanSerializerDeserializer;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.EnumDeserializer;
@@ -45,12 +44,7 @@
 
     private static final Logger LOGGER = LogManager.getLogger();
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new InjectFailureDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = InjectFailureDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/LenDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/LenDescriptor.java
index f94bc32..6143f25 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/LenDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/LenDescriptor.java
@@ -28,7 +28,6 @@
 import org.apache.asterix.om.base.AInt64;
 import org.apache.asterix.om.base.AMutableInt64;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -48,12 +47,7 @@
 @MissingNullInOutFunction
 public class LenDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new LenDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = LenDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NotDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NotDescriptor.java
index bba8cac..4b4cbc2 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NotDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NotDescriptor.java
@@ -25,7 +25,6 @@
 import org.apache.asterix.formats.nontagged.SerializerDeserializerProvider;
 import org.apache.asterix.om.base.ABoolean;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -45,12 +44,7 @@
 @MissingNullInOutFunction
 public class NotDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new NotDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = NotDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericACosDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericACosDescriptor.java
index 15ce5f8..146e89d 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericACosDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericACosDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -33,12 +32,7 @@
 @MissingNullInOutFunction
 public class NumericACosDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new NumericACosDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = NumericACosDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericASinDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericASinDescriptor.java
index 6e48b90..3f132a1 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericASinDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericASinDescriptor.java
@@ -21,7 +21,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 @MissingNullInOutFunction
 public class NumericASinDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new NumericASinDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = NumericASinDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericATan2Descriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericATan2Descriptor.java
index 815b479..d042cdc 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericATan2Descriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericATan2Descriptor.java
@@ -28,7 +28,6 @@
 import org.apache.asterix.om.base.AMutableDouble;
 import org.apache.asterix.om.exceptions.ExceptionUtil;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.BuiltinType;
 import org.apache.asterix.om.types.hierachy.ATypeHierarchy;
@@ -48,12 +47,7 @@
 public class NumericATan2Descriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new NumericATan2Descriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = NumericATan2Descriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericATanDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericATanDescriptor.java
index bb8fd12..99acea7 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericATanDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericATanDescriptor.java
@@ -21,7 +21,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 @MissingNullInOutFunction
 public class NumericATanDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new NumericATanDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = NumericATanDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericAbsDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericAbsDescriptor.java
index 4140410..d988982 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericAbsDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericAbsDescriptor.java
@@ -25,7 +25,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -38,12 +37,7 @@
 @MissingNullInOutFunction
 public class NumericAbsDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new NumericAbsDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = NumericAbsDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericAddDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericAddDescriptor.java
index f82cb7c..d0691f5 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericAddDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericAddDescriptor.java
@@ -24,7 +24,6 @@
 import org.apache.asterix.om.base.temporal.DurationArithmeticOperations;
 import org.apache.asterix.om.exceptions.ExceptionUtil;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.runtime.exceptions.OverflowException;
@@ -36,11 +35,7 @@
 public class NumericAddDescriptor extends AbstractNumericArithmeticEval {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new NumericAddDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = NumericAddDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericCeilingDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericCeilingDescriptor.java
index 209ae75..6e6cbdc 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericCeilingDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericCeilingDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 public class NumericCeilingDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new NumericCeilingDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = NumericCeilingDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericCosDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericCosDescriptor.java
index a5056ae..0057445 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericCosDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericCosDescriptor.java
@@ -21,7 +21,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 @MissingNullInOutFunction
 public class NumericCosDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new NumericCosDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = NumericCosDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericCoshDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericCoshDescriptor.java
index 9ad9daa..40b784e 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericCoshDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericCoshDescriptor.java
@@ -21,7 +21,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 @MissingNullInOutFunction
 public class NumericCoshDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new NumericCoshDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = NumericCoshDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericDegreesDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericDegreesDescriptor.java
index 96d3f9e..173d41e 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericDegreesDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericDegreesDescriptor.java
@@ -21,7 +21,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 @MissingNullInOutFunction
 public class NumericDegreesDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new NumericDegreesDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = NumericDegreesDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericDivDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericDivDescriptor.java
index dbd5251..8215d8e 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericDivDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericDivDescriptor.java
@@ -24,7 +24,6 @@
 import org.apache.asterix.om.base.AMutableInt64;
 import org.apache.asterix.om.exceptions.ExceptionUtil;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.runtime.exceptions.OverflowException;
@@ -36,11 +35,7 @@
 public class NumericDivDescriptor extends AbstractNumericArithmeticEval {
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new NumericDivDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = NumericDivDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericDivideDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericDivideDescriptor.java
index b23c2ac..a03792a 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericDivideDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericDivideDescriptor.java
@@ -23,7 +23,6 @@
 import org.apache.asterix.om.base.AMutableInt64;
 import org.apache.asterix.om.exceptions.ExceptionUtil;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,11 +33,7 @@
 public class NumericDivideDescriptor extends AbstractNumericArithmeticEval {
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new NumericDivideDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = NumericDivideDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericExpDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericExpDescriptor.java
index 20054cd..6468cd7 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericExpDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericExpDescriptor.java
@@ -21,7 +21,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 @MissingNullInOutFunction
 public class NumericExpDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new NumericExpDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = NumericExpDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericFloorDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericFloorDescriptor.java
index b1f19d7..fbfc738 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericFloorDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericFloorDescriptor.java
@@ -25,7 +25,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -38,12 +37,7 @@
 @MissingNullInOutFunction
 public class NumericFloorDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new NumericFloorDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = NumericFloorDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericLnDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericLnDescriptor.java
index dfd6a8d..0e3c8c9 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericLnDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericLnDescriptor.java
@@ -21,7 +21,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 @MissingNullInOutFunction
 public class NumericLnDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new NumericLnDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = NumericLnDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericLogDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericLogDescriptor.java
index e12b948..db4a4f1 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericLogDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericLogDescriptor.java
@@ -21,7 +21,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 @MissingNullInOutFunction
 public class NumericLogDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new NumericLogDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = NumericLogDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericModuloDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericModuloDescriptor.java
index 3932eda..a6b6db4 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericModuloDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericModuloDescriptor.java
@@ -23,7 +23,6 @@
 import org.apache.asterix.om.base.AMutableInt64;
 import org.apache.asterix.om.exceptions.ExceptionUtil;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,13 +33,7 @@
 public class NumericModuloDescriptor extends AbstractNumericArithmeticEval {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new NumericModuloDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = NumericModuloDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericMultiplyDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericMultiplyDescriptor.java
index 7bfb983..95410d5 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericMultiplyDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericMultiplyDescriptor.java
@@ -23,7 +23,6 @@
 import org.apache.asterix.om.base.AMutableInt64;
 import org.apache.asterix.om.exceptions.ExceptionUtil;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.runtime.exceptions.OverflowException;
@@ -35,11 +34,7 @@
 public class NumericMultiplyDescriptor extends AbstractNumericArithmeticEval {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new NumericMultiplyDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = NumericMultiplyDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericPowerDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericPowerDescriptor.java
index be97a65..ecb003b 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericPowerDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericPowerDescriptor.java
@@ -23,7 +23,6 @@
 import org.apache.asterix.om.base.AMutableInt64;
 import org.apache.asterix.om.exceptions.ExceptionUtil;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.runtime.exceptions.OverflowException;
@@ -38,11 +37,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new NumericPowerDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = NumericPowerDescriptor::new;
 
     /* (non-Javadoc)
      * @see org.apache.asterix.runtime.evaluators.functions.AbstractNumericArithmeticEval#evaluateInteger(long, long)
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericRadiansDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericRadiansDescriptor.java
index 38b07ce..7bab807 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericRadiansDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericRadiansDescriptor.java
@@ -21,7 +21,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 @MissingNullInOutFunction
 public class NumericRadiansDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new NumericRadiansDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = NumericRadiansDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericRoundHalfToEvenDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericRoundHalfToEvenDescriptor.java
index b1879a6..944850a 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericRoundHalfToEvenDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericRoundHalfToEvenDescriptor.java
@@ -25,7 +25,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -39,12 +38,7 @@
 @MissingNullInOutFunction
 public class NumericRoundHalfToEvenDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new NumericRoundHalfToEvenDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = NumericRoundHalfToEvenDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericSignDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericSignDescriptor.java
index 05d5723..ee65375 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericSignDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericSignDescriptor.java
@@ -21,7 +21,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 @MissingNullInOutFunction
 public class NumericSignDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new NumericSignDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = NumericSignDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericSinDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericSinDescriptor.java
index 2d9e578..b5a22ad 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericSinDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericSinDescriptor.java
@@ -21,7 +21,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 @MissingNullInOutFunction
 public class NumericSinDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new NumericSinDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = NumericSinDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericSinhDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericSinhDescriptor.java
index d8d610e..6d66a2c 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericSinhDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericSinhDescriptor.java
@@ -21,7 +21,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 @MissingNullInOutFunction
 public class NumericSinhDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new NumericSinhDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = NumericSinhDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericSqrtDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericSqrtDescriptor.java
index fe1e673..e4206ed 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericSqrtDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericSqrtDescriptor.java
@@ -21,7 +21,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 @MissingNullInOutFunction
 public class NumericSqrtDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new NumericSqrtDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = NumericSqrtDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericSubDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericSubDescriptor.java
index 6305074..275dfca 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericSubDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericSubDescriptor.java
@@ -23,7 +23,6 @@
 import org.apache.asterix.om.base.AMutableInt64;
 import org.apache.asterix.om.base.temporal.DurationArithmeticOperations;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.exceptions.OverflowException;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,11 +33,7 @@
 public class NumericSubDescriptor extends AbstractNumericArithmeticEval {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new NumericSubDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = NumericSubDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericSubtractDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericSubtractDescriptor.java
index e1aaf38..bc69fac 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericSubtractDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericSubtractDescriptor.java
@@ -35,7 +35,6 @@
 import org.apache.asterix.om.base.AMutableInt64;
 import org.apache.asterix.om.base.AMutableInt8;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -57,12 +56,7 @@
 public class NumericSubtractDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new NumericSubtractDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = NumericSubtractDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericTanDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericTanDescriptor.java
index ececf63..c20c46e 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericTanDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericTanDescriptor.java
@@ -21,7 +21,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 @MissingNullInOutFunction
 public class NumericTanDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new NumericTanDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = NumericTanDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericTanhDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericTanhDescriptor.java
index 2d569b7..923e9c9 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericTanhDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericTanhDescriptor.java
@@ -21,7 +21,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 @MissingNullInOutFunction
 public class NumericTanhDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new NumericTanhDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = NumericTanhDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericUnaryMinusDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericUnaryMinusDescriptor.java
index 29a16d9..06a5b76 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericUnaryMinusDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/NumericUnaryMinusDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 public class NumericUnaryMinusDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new NumericUnaryMinusDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = NumericUnaryMinusDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/OrDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/OrDescriptor.java
index 71069f8..091fd4b 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/OrDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/OrDescriptor.java
@@ -26,7 +26,6 @@
 import org.apache.asterix.om.base.AMissing;
 import org.apache.asterix.om.base.ANull;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -45,12 +44,7 @@
 
 public class OrDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new OrDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = OrDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/RandomDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/RandomDescriptor.java
index 82289ed..8184434 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/RandomDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/RandomDescriptor.java
@@ -20,7 +20,6 @@
 package org.apache.asterix.runtime.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.asterix.runtime.evaluators.functions.utils.RandomHelper;
@@ -35,12 +34,7 @@
 public class RandomDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new RandomDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = RandomDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/RandomWithSeedDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/RandomWithSeedDescriptor.java
index bd6bd3d..c47253b 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/RandomWithSeedDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/RandomWithSeedDescriptor.java
@@ -24,7 +24,6 @@
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.exceptions.ExceptionUtil;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.hierachy.ATypeHierarchy;
@@ -43,12 +42,7 @@
 public class RandomWithSeedDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new RandomWithSeedDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = RandomWithSeedDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/SpatialAreaDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/SpatialAreaDescriptor.java
index 10ecb1f..b7164a1 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/SpatialAreaDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/SpatialAreaDescriptor.java
@@ -28,7 +28,6 @@
 import org.apache.asterix.dataflow.data.nontagged.serde.AInt16SerializerDeserializer;
 import org.apache.asterix.dataflow.data.nontagged.serde.ARectangleSerializerDeserializer;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.EnumDeserializer;
@@ -50,12 +49,7 @@
 public class SpatialAreaDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SpatialAreaDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SpatialAreaDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/SpatialCellDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/SpatialCellDescriptor.java
index d0c40c9..3753f58 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/SpatialCellDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/SpatialCellDescriptor.java
@@ -30,7 +30,6 @@
 import org.apache.asterix.om.base.AMutableRectangle;
 import org.apache.asterix.om.base.ARectangle;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -51,12 +50,7 @@
 public class SpatialCellDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SpatialCellDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SpatialCellDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/SpatialDistanceDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/SpatialDistanceDescriptor.java
index 3c428e8..af858f4 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/SpatialDistanceDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/SpatialDistanceDescriptor.java
@@ -26,7 +26,6 @@
 import org.apache.asterix.dataflow.data.nontagged.serde.ADoubleSerializerDeserializer;
 import org.apache.asterix.dataflow.data.nontagged.serde.APointSerializerDeserializer;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
@@ -45,12 +44,7 @@
 public class SpatialDistanceDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SpatialDistanceDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SpatialDistanceDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringContainsDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringContainsDescriptor.java
index b4d8ab6..eeec70f 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringContainsDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringContainsDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 public class StringContainsDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new StringContainsDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = StringContainsDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringEndsWithDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringEndsWithDescriptor.java
index 0c952cf..333eb5a 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringEndsWithDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringEndsWithDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 public class StringEndsWithDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new StringEndsWithDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = StringEndsWithDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringEqualDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringEqualDescriptor.java
index bbe7c59..4bee3ce 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringEqualDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringEqualDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 public class StringEqualDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new StringEqualDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = StringEqualDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringInitCapDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringInitCapDescriptor.java
index b201c80..a385931 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringInitCapDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringInitCapDescriptor.java
@@ -23,7 +23,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -38,12 +37,7 @@
 public class StringInitCapDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new StringInitCapDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = StringInitCapDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringLTrim2Descriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringLTrim2Descriptor.java
index 6aebf6b..9f561d4 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringLTrim2Descriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringLTrim2Descriptor.java
@@ -23,7 +23,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.asterix.runtime.evaluators.functions.utils.StringTrimmer;
@@ -38,12 +37,7 @@
 public class StringLTrim2Descriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new StringLTrim2Descriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = StringLTrim2Descriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringLTrimDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringLTrimDescriptor.java
index 4d4fd93..d86287f 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringLTrimDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringLTrimDescriptor.java
@@ -23,7 +23,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.asterix.runtime.evaluators.functions.utils.StringTrimmer;
@@ -39,12 +38,7 @@
 public class StringLTrimDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new StringLTrimDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = StringLTrimDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringLengthDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringLengthDescriptor.java
index a4fd667..47caf14 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringLengthDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringLengthDescriptor.java
@@ -27,7 +27,6 @@
 import org.apache.asterix.om.base.AMutableInt64;
 import org.apache.asterix.om.exceptions.ExceptionUtil;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -47,12 +46,7 @@
 @MissingNullInOutFunction
 public class StringLengthDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new StringLengthDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = StringLengthDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringLowerCaseDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringLowerCaseDescriptor.java
index f37a385..b1c60bd 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringLowerCaseDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringLowerCaseDescriptor.java
@@ -22,7 +22,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -37,12 +36,7 @@
 public class StringLowerCaseDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new StringLowerCaseDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = StringLowerCaseDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringRTrim2Descriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringRTrim2Descriptor.java
index bf463a1..2817652 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringRTrim2Descriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringRTrim2Descriptor.java
@@ -23,7 +23,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.asterix.runtime.evaluators.functions.utils.StringTrimmer;
@@ -38,12 +37,7 @@
 public class StringRTrim2Descriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new StringRTrim2Descriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = StringRTrim2Descriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringRTrimDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringRTrimDescriptor.java
index e99c401..5f04340 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringRTrimDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringRTrimDescriptor.java
@@ -23,7 +23,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.asterix.runtime.evaluators.functions.utils.StringTrimmer;
@@ -39,12 +38,7 @@
 public class StringRTrimDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new StringRTrimDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = StringRTrimDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringRegExpLikeDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringRegExpLikeDescriptor.java
index 8a6587e..b5544cb 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringRegExpLikeDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringRegExpLikeDescriptor.java
@@ -21,7 +21,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.asterix.runtime.evaluators.functions.utils.RegExpMatcher;
@@ -36,12 +35,7 @@
 public class StringRegExpLikeDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new StringRegExpLikeDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = StringRegExpLikeDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringRegExpLikeWithFlagDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringRegExpLikeWithFlagDescriptor.java
index 046f80e..c8f8c61 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringRegExpLikeWithFlagDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringRegExpLikeWithFlagDescriptor.java
@@ -21,7 +21,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.asterix.runtime.evaluators.functions.utils.RegExpMatcher;
@@ -36,12 +35,7 @@
 public class StringRegExpLikeWithFlagDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new StringRegExpLikeWithFlagDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = StringRegExpLikeWithFlagDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringReplaceDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringReplaceDescriptor.java
index e240bfa..f0f547f 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringReplaceDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringReplaceDescriptor.java
@@ -21,7 +21,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.asterix.runtime.evaluators.functions.utils.StringReplacer;
@@ -36,12 +35,7 @@
 @MissingNullInOutFunction
 public class StringReplaceDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new StringReplaceDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = StringReplaceDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringReverseDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringReverseDescriptor.java
index 6d81e59..bc514da 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringReverseDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringReverseDescriptor.java
@@ -23,7 +23,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -37,12 +36,7 @@
 @MissingNullInOutFunction
 public class StringReverseDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new StringReverseDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = StringReverseDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringSplitDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringSplitDescriptor.java
index aef92c5..2a56a57 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringSplitDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringSplitDescriptor.java
@@ -26,7 +26,6 @@
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.exceptions.ExceptionUtil;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.AOrderedListType;
 import org.apache.asterix.om.types.ATypeTag;
@@ -49,12 +48,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new StringSplitDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = StringSplitDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringStartsWithDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringStartsWithDescriptor.java
index 41eeeca..caa1e64 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringStartsWithDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringStartsWithDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 public class StringStartsWithDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new StringStartsWithDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = StringStartsWithDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringToCodePointDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringToCodePointDescriptor.java
index 8d03352..2f6a223 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringToCodePointDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringToCodePointDescriptor.java
@@ -28,7 +28,6 @@
 import org.apache.asterix.om.base.AMutableInt64;
 import org.apache.asterix.om.exceptions.ExceptionUtil;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.AOrderedListType;
 import org.apache.asterix.om.types.ATypeTag;
@@ -51,12 +50,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new StringToCodePointDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = StringToCodePointDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringTrim2Descriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringTrim2Descriptor.java
index 3fad596..60c6c04 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringTrim2Descriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringTrim2Descriptor.java
@@ -23,7 +23,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.asterix.runtime.evaluators.functions.utils.StringTrimmer;
@@ -38,12 +37,7 @@
 public class StringTrim2Descriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new StringTrim2Descriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = StringTrim2Descriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringTrimDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringTrimDescriptor.java
index 3f0ec52..c252037 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringTrimDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringTrimDescriptor.java
@@ -23,7 +23,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.asterix.runtime.evaluators.functions.utils.StringTrimmer;
@@ -39,12 +38,7 @@
 public class StringTrimDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new StringTrimDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = StringTrimDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringUpperCaseDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringUpperCaseDescriptor.java
index 102892b..300dd86 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringUpperCaseDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/StringUpperCaseDescriptor.java
@@ -22,7 +22,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -37,12 +36,7 @@
 public class StringUpperCaseDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new StringUpperCaseDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = StringUpperCaseDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/SubstringAfterDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/SubstringAfterDescriptor.java
index 44c1094..e106a1c 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/SubstringAfterDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/SubstringAfterDescriptor.java
@@ -24,7 +24,6 @@
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.exceptions.ExceptionUtil;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
@@ -44,12 +43,7 @@
 @MissingNullInOutFunction
 public class SubstringAfterDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SubstringAfterDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SubstringAfterDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/SubstringBeforeDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/SubstringBeforeDescriptor.java
index 4da815f..6eef5ce 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/SubstringBeforeDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/SubstringBeforeDescriptor.java
@@ -24,7 +24,6 @@
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.exceptions.ExceptionUtil;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
@@ -44,12 +43,7 @@
 @MissingNullInOutFunction
 public class SubstringBeforeDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SubstringBeforeDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SubstringBeforeDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/SwitchCaseDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/SwitchCaseDescriptor.java
index 3e1eb49..fbf52f2 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/SwitchCaseDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/SwitchCaseDescriptor.java
@@ -19,7 +19,6 @@
 package org.apache.asterix.runtime.evaluators.functions;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -34,12 +33,7 @@
 public class SwitchCaseDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SwitchCaseDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SwitchCaseDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/ToBigIntDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/ToBigIntDescriptor.java
index 23c8adc..b1edd2c 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/ToBigIntDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/ToBigIntDescriptor.java
@@ -21,7 +21,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
@@ -36,12 +35,7 @@
 @MissingNullInOutFunction
 public class ToBigIntDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new ToBigIntDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = ToBigIntDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/ToBooleanDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/ToBooleanDescriptor.java
index 5fa8424..4954ece 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/ToBooleanDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/ToBooleanDescriptor.java
@@ -24,7 +24,6 @@
 import org.apache.asterix.dataflow.data.nontagged.serde.ARecordSerializerDeserializer;
 import org.apache.asterix.dataflow.data.nontagged.serde.AUnorderedListSerializerDeserializer;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
@@ -40,12 +39,8 @@
 @MissingNullInOutFunction
 public class ToBooleanDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new ToBooleanDescriptor();
-        }
-    };
+
+    public static final IFunctionDescriptorFactory FACTORY = ToBooleanDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/ToDoubleDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/ToDoubleDescriptor.java
index 95874c6..196afb6 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/ToDoubleDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/ToDoubleDescriptor.java
@@ -21,7 +21,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
@@ -36,12 +35,7 @@
 @MissingNullInOutFunction
 public class ToDoubleDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new ToDoubleDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = ToDoubleDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/ToNumberDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/ToNumberDescriptor.java
index a5e66af..7017380 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/ToNumberDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/ToNumberDescriptor.java
@@ -29,7 +29,6 @@
 import org.apache.asterix.om.base.AMutableDouble;
 import org.apache.asterix.om.base.AMutableInt64;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -51,12 +50,7 @@
 @MissingNullInOutFunction
 public class ToNumberDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new ToNumberDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = ToNumberDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/ToObjectDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/ToObjectDescriptor.java
index 7c57c1e..9d0373b 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/ToObjectDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/ToObjectDescriptor.java
@@ -24,7 +24,6 @@
 import org.apache.asterix.builders.RecordBuilder;
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
@@ -42,12 +41,7 @@
 public class ToObjectDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = -4146417699529927812L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new ToObjectDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = ToObjectDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/ToStringDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/ToStringDescriptor.java
index de9224d..84ce9d7 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/ToStringDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/ToStringDescriptor.java
@@ -21,7 +21,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
@@ -36,12 +35,7 @@
 @MissingNullInOutFunction
 public class ToStringDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new ToStringDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = ToStringDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/TreatAsIntegerDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/TreatAsIntegerDescriptor.java
index aa42ede..2fee7e9 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/TreatAsIntegerDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/TreatAsIntegerDescriptor.java
@@ -28,7 +28,6 @@
 import org.apache.asterix.om.base.AInt32;
 import org.apache.asterix.om.base.AMutableInt32;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -49,12 +48,7 @@
 @MissingNullInOutFunction
 public class TreatAsIntegerDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new TreatAsIntegerDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = TreatAsIntegerDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/UUIDDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/UUIDDescriptor.java
index 3076358..5437222 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/UUIDDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/UUIDDescriptor.java
@@ -25,7 +25,6 @@
 import org.apache.asterix.om.base.AGeneratedUUID;
 import org.apache.asterix.om.base.AUUID;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.BuiltinType;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
@@ -43,12 +42,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new UUIDDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = UUIDDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/binary/BinaryConcatDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/binary/BinaryConcatDescriptor.java
index ff19458..1b115e4 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/binary/BinaryConcatDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/binary/BinaryConcatDescriptor.java
@@ -26,7 +26,6 @@
 import org.apache.asterix.om.base.AMissing;
 import org.apache.asterix.om.base.ANull;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -50,12 +49,7 @@
 public class BinaryConcatDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new BinaryConcatDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = BinaryConcatDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/binary/BinaryLengthDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/binary/BinaryLengthDescriptor.java
index 7305fbf..7649ba5 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/binary/BinaryLengthDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/binary/BinaryLengthDescriptor.java
@@ -24,7 +24,6 @@
 import org.apache.asterix.om.base.AInt64;
 import org.apache.asterix.om.base.AMutableInt64;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -43,12 +42,7 @@
 @MissingNullInOutFunction
 public class BinaryLengthDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new BinaryLengthDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = BinaryLengthDescriptor::new;
 
     private static final ATypeTag[] EXPECTED_TAGS = { ATypeTag.BINARY };
 
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/binary/ParseBinaryDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/binary/ParseBinaryDescriptor.java
index 83be52c..dea07fb 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/binary/ParseBinaryDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/binary/ParseBinaryDescriptor.java
@@ -24,7 +24,6 @@
 import org.apache.asterix.om.base.ABinary;
 import org.apache.asterix.om.base.AMutableBinary;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -49,12 +48,7 @@
     private static final UTF8StringPointable HEX_FORMAT = UTF8StringPointable.generateUTF8Pointable("hex");
     private static final UTF8StringPointable BASE64_FORMAT = UTF8StringPointable.generateUTF8Pointable("base64");
 
-    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new ParseBinaryDescriptor();
-        }
-    };
+    public final static IFunctionDescriptorFactory FACTORY = ParseBinaryDescriptor::new;
 
     public static final ATypeTag[] EXPECTED_INPUT_TAGS = { ATypeTag.STRING, ATypeTag.STRING };
 
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/binary/PrintBinaryDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/binary/PrintBinaryDescriptor.java
index ee303ba..521c010 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/binary/PrintBinaryDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/binary/PrintBinaryDescriptor.java
@@ -23,7 +23,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
@@ -53,12 +52,7 @@
         return BuiltinFunctions.PRINT_BINARY;
     }
 
-    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new PrintBinaryDescriptor();
-        }
-    };
+    public final static IFunctionDescriptorFactory FACTORY = PrintBinaryDescriptor::new;
 
     public final static ATypeTag[] EXPECTED_INPUT_TAGS = { ATypeTag.BINARY, ATypeTag.STRING };
 
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/records/FieldAccessByNameDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/records/FieldAccessByNameDescriptor.java
index c5c7c97..10670dc 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/records/FieldAccessByNameDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/records/FieldAccessByNameDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -30,11 +29,7 @@
 public class FieldAccessByNameDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new FieldAccessByNameDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = FieldAccessByNameDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/AdjustDateTimeForTimeZoneDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/AdjustDateTimeForTimeZoneDescriptor.java
index 997881a..da8d94f 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/AdjustDateTimeForTimeZoneDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/AdjustDateTimeForTimeZoneDescriptor.java
@@ -27,7 +27,6 @@
 import org.apache.asterix.om.base.temporal.GregorianCalendarSystem;
 import org.apache.asterix.om.base.temporal.GregorianCalendarSystem.Fields;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
@@ -51,13 +50,7 @@
 
     private final static long serialVersionUID = 1L;
     public final static FunctionIdentifier FID = BuiltinFunctions.ADJUST_DATETIME_FOR_TIMEZONE;
-    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new AdjustDateTimeForTimeZoneDescriptor();
-        }
-    };
+    public final static IFunctionDescriptorFactory FACTORY = AdjustDateTimeForTimeZoneDescriptor::new;
 
     /* (non-Javadoc)
      * @see org.apache.asterix.runtime.base.IScalarFunctionDynamicDescriptor#createEvaluatorFactory(org.apache.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory[])
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/AdjustTimeForTimeZoneDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/AdjustTimeForTimeZoneDescriptor.java
index b4b7aaf..44ef832 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/AdjustTimeForTimeZoneDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/AdjustTimeForTimeZoneDescriptor.java
@@ -27,7 +27,6 @@
 import org.apache.asterix.om.base.temporal.GregorianCalendarSystem;
 import org.apache.asterix.om.base.temporal.GregorianCalendarSystem.Fields;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
@@ -50,13 +49,7 @@
 public class AdjustTimeForTimeZoneDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private final static long serialVersionUID = 1L;
     public final static FunctionIdentifier FID = BuiltinFunctions.ADJUST_TIME_FOR_TIMEZONE;
-    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new AdjustTimeForTimeZoneDescriptor();
-        }
-    };
+    public final static IFunctionDescriptorFactory FACTORY = AdjustTimeForTimeZoneDescriptor::new;
 
     /* (non-Javadoc)
      * @see org.apache.asterix.runtime.base.IScalarFunctionDynamicDescriptor#createEvaluatorFactory(org.apache.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory[])
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/CalendarDurationFromDateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/CalendarDurationFromDateDescriptor.java
index 8c5a303..3a1fe52 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/CalendarDurationFromDateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/CalendarDurationFromDateDescriptor.java
@@ -29,7 +29,6 @@
 import org.apache.asterix.om.base.temporal.DurationArithmeticOperations;
 import org.apache.asterix.om.base.temporal.GregorianCalendarSystem;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -51,13 +50,7 @@
 public class CalendarDurationFromDateDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private final static long serialVersionUID = 1L;
     public final static FunctionIdentifier FID = BuiltinFunctions.CALENDAR_DURATION_FROM_DATE;
-    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new CalendarDurationFromDateDescriptor();
-        }
-    };
+    public final static IFunctionDescriptorFactory FACTORY = CalendarDurationFromDateDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/CalendarDurationFromDateTimeDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/CalendarDurationFromDateTimeDescriptor.java
index 67c0c05..bf450f0 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/CalendarDurationFromDateTimeDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/CalendarDurationFromDateTimeDescriptor.java
@@ -29,7 +29,6 @@
 import org.apache.asterix.om.base.temporal.DurationArithmeticOperations;
 import org.apache.asterix.om.base.temporal.GregorianCalendarSystem;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -70,13 +69,7 @@
 public class CalendarDurationFromDateTimeDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
     public static final FunctionIdentifier FID = BuiltinFunctions.CALENDAR_DURATION_FROM_DATETIME;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new CalendarDurationFromDateTimeDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = CalendarDurationFromDateTimeDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DateFromDatetimeDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DateFromDatetimeDescriptor.java
index 68fe96b..079d8a0 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DateFromDatetimeDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DateFromDatetimeDescriptor.java
@@ -27,7 +27,6 @@
 import org.apache.asterix.om.base.AMutableDate;
 import org.apache.asterix.om.base.temporal.GregorianCalendarSystem;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -49,14 +48,7 @@
 public class DateFromDatetimeDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
     public final static FunctionIdentifier FID = BuiltinFunctions.DATE_FROM_DATETIME;
-    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new DateFromDatetimeDescriptor();
-        }
-
-    };
+    public final static IFunctionDescriptorFactory FACTORY = DateFromDatetimeDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DateFromUnixTimeInDaysDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DateFromUnixTimeInDaysDescriptor.java
index 4f05b1b..a4d62a0 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DateFromUnixTimeInDaysDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DateFromUnixTimeInDaysDescriptor.java
@@ -25,7 +25,6 @@
 import org.apache.asterix.om.base.ADate;
 import org.apache.asterix.om.base.AMutableDate;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.BuiltinType;
 import org.apache.asterix.om.types.hierachy.ATypeHierarchy;
@@ -47,13 +46,7 @@
 
     private final static long serialVersionUID = 1L;
     public final static FunctionIdentifier FID = BuiltinFunctions.DATE_FROM_UNIX_TIME_IN_DAYS;
-    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new DateFromUnixTimeInDaysDescriptor();
-        }
-    };
+    public final static IFunctionDescriptorFactory FACTORY = DateFromUnixTimeInDaysDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DatetimeFromDateAndTimeDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DatetimeFromDateAndTimeDescriptor.java
index 4fdef14..c288e2c 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DatetimeFromDateAndTimeDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DatetimeFromDateAndTimeDescriptor.java
@@ -28,7 +28,6 @@
 import org.apache.asterix.om.base.AMutableDateTime;
 import org.apache.asterix.om.base.temporal.GregorianCalendarSystem;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -50,14 +49,7 @@
 public class DatetimeFromDateAndTimeDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
     public final static FunctionIdentifier FID = BuiltinFunctions.DATETIME_FROM_DATE_TIME;
-    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new DatetimeFromDateAndTimeDescriptor();
-        }
-
-    };
+    public final static IFunctionDescriptorFactory FACTORY = DatetimeFromDateAndTimeDescriptor::new;
 
     /* (non-Javadoc)
      * @see org.apache.asterix.runtime.base.IScalarFunctionDynamicDescriptor#createEvaluatorFactory(org.apache.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory[])
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DatetimeFromUnixTimeInMsDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DatetimeFromUnixTimeInMsDescriptor.java
index cff8a86..79a6f5a 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DatetimeFromUnixTimeInMsDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DatetimeFromUnixTimeInMsDescriptor.java
@@ -31,9 +31,10 @@
 @MissingNullInOutFunction
 public final class DatetimeFromUnixTimeInMsDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
-    public final static FunctionIdentifier FID = BuiltinFunctions.DATETIME_FROM_UNIX_TIME_IN_MS;
-    public final static IFunctionDescriptorFactory FACTORY = DatetimeFromUnixTimeInMsDescriptor::new;
     private final static long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = BuiltinFunctions.DATETIME_FROM_UNIX_TIME_IN_MS;
+
+    public final static IFunctionDescriptorFactory FACTORY = DatetimeFromUnixTimeInMsDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DatetimeFromUnixTimeInSecsDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DatetimeFromUnixTimeInSecsDescriptor.java
index 2b4cfc7..4e625f1 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DatetimeFromUnixTimeInSecsDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DatetimeFromUnixTimeInSecsDescriptor.java
@@ -33,6 +33,7 @@
 
     private final static long serialVersionUID = 1L;
     public final static FunctionIdentifier FID = BuiltinFunctions.DATETIME_FROM_UNIX_TIME_IN_SECS;
+
     public final static IFunctionDescriptorFactory FACTORY = DatetimeFromUnixTimeInSecsDescriptor::new;
 
     @Override
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DayOfWeekDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DayOfWeekDescriptor.java
index b102129..41442e4 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DayOfWeekDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DayOfWeekDescriptor.java
@@ -30,9 +30,10 @@
 
 @MissingNullInOutFunction
 public class DayOfWeekDescriptor extends AbstractScalarFunctionDynamicDescriptor {
-    public final static FunctionIdentifier FID = BuiltinFunctions.DAY_OF_WEEK;
-    public final static IFunctionDescriptorFactory FACTORY = DayOfWeekDescriptor::new;
     private static final long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = BuiltinFunctions.DAY_OF_WEEK;
+
+    public final static IFunctionDescriptorFactory FACTORY = DayOfWeekDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DayTimeDurationGreaterThanComparatorDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DayTimeDurationGreaterThanComparatorDescriptor.java
index 9157f80..5f2b7d2 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DayTimeDurationGreaterThanComparatorDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DayTimeDurationGreaterThanComparatorDescriptor.java
@@ -20,20 +20,13 @@
 package org.apache.asterix.runtime.evaluators.functions.temporal;
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 
 @MissingNullInOutFunction
 public class DayTimeDurationGreaterThanComparatorDescriptor extends DayTimeDurationComparatorDescriptor {
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new DayTimeDurationGreaterThanComparatorDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = DayTimeDurationGreaterThanComparatorDescriptor::new;
 
     protected DayTimeDurationGreaterThanComparatorDescriptor() {
         super(true);
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DayTimeDurationLessThanComparatorDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DayTimeDurationLessThanComparatorDescriptor.java
index cb662e3..ee368f3 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DayTimeDurationLessThanComparatorDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DayTimeDurationLessThanComparatorDescriptor.java
@@ -20,20 +20,13 @@
 package org.apache.asterix.runtime.evaluators.functions.temporal;
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 
 @MissingNullInOutFunction
 public class DayTimeDurationLessThanComparatorDescriptor extends DayTimeDurationComparatorDescriptor {
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new DayTimeDurationLessThanComparatorDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = DayTimeDurationLessThanComparatorDescriptor::new;
 
     protected DayTimeDurationLessThanComparatorDescriptor() {
         super(false);
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DurationEqualDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DurationEqualDescriptor.java
index fc6c39b..3044b12 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DurationEqualDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DurationEqualDescriptor.java
@@ -25,7 +25,6 @@
 import org.apache.asterix.formats.nontagged.SerializerDeserializerProvider;
 import org.apache.asterix.om.base.ABoolean;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -47,13 +46,7 @@
 public class DurationEqualDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private final static long serialVersionUID = 1L;
     public final static FunctionIdentifier FID = BuiltinFunctions.DURATION_EQUAL;
-    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new DurationEqualDescriptor();
-        }
-    };
+    public final static IFunctionDescriptorFactory FACTORY = DurationEqualDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DurationFromIntervalDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DurationFromIntervalDescriptor.java
index fc58cc2..baaf058 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DurationFromIntervalDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DurationFromIntervalDescriptor.java
@@ -27,7 +27,6 @@
 import org.apache.asterix.om.base.AMutableDayTimeDuration;
 import org.apache.asterix.om.base.temporal.GregorianCalendarSystem;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -49,14 +48,7 @@
 public class DurationFromIntervalDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
     public final static FunctionIdentifier FID = BuiltinFunctions.DURATION_FROM_INTERVAL;
-    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new DurationFromIntervalDescriptor();
-        }
-
-    };
+    public final static IFunctionDescriptorFactory FACTORY = DurationFromIntervalDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DurationFromMillisecondsDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DurationFromMillisecondsDescriptor.java
index d075562..4a35594 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DurationFromMillisecondsDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DurationFromMillisecondsDescriptor.java
@@ -29,7 +29,6 @@
 import org.apache.asterix.om.base.ADuration;
 import org.apache.asterix.om.base.AMutableDuration;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -53,13 +52,7 @@
     private final static long serialVersionUID = 1L;
     public final static FunctionIdentifier FID = BuiltinFunctions.DURATION_FROM_MILLISECONDS;
 
-    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new DurationFromMillisecondsDescriptor();
-        }
-    };
+    public final static IFunctionDescriptorFactory FACTORY = DurationFromMillisecondsDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DurationFromMonthsDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DurationFromMonthsDescriptor.java
index e71714b..5ae3123 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DurationFromMonthsDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/DurationFromMonthsDescriptor.java
@@ -25,7 +25,6 @@
 import org.apache.asterix.om.base.ADuration;
 import org.apache.asterix.om.base.AMutableDuration;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.BuiltinType;
 import org.apache.asterix.om.types.hierachy.ATypeHierarchy;
@@ -47,13 +46,7 @@
 
     private final static long serialVersionUID = 1L;
     public final static FunctionIdentifier FID = BuiltinFunctions.DURATION_FROM_MONTHS;
-    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new DurationFromMonthsDescriptor();
-        }
-    };
+    public final static IFunctionDescriptorFactory FACTORY = DurationFromMonthsDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/GetDayTimeDurationDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/GetDayTimeDurationDescriptor.java
index 0af84df..358aecd 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/GetDayTimeDurationDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/GetDayTimeDurationDescriptor.java
@@ -26,7 +26,6 @@
 import org.apache.asterix.om.base.ADayTimeDuration;
 import org.apache.asterix.om.base.AMutableDayTimeDuration;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -48,13 +47,7 @@
 public class GetDayTimeDurationDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
     public final static FunctionIdentifier FID = BuiltinFunctions.GET_DAY_TIME_DURATION;
-    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new GetDayTimeDurationDescriptor();
-        }
-    };
+    public final static IFunctionDescriptorFactory FACTORY = GetDayTimeDurationDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/GetOverlappingIntervalDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/GetOverlappingIntervalDescriptor.java
index dc08502..0010b9e 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/GetOverlappingIntervalDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/GetOverlappingIntervalDescriptor.java
@@ -26,7 +26,6 @@
 import org.apache.asterix.om.base.AMutableInterval;
 import org.apache.asterix.om.base.ANull;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.pointables.nonvisitor.AIntervalPointable;
 import org.apache.asterix.om.types.ATypeTag;
@@ -49,12 +48,7 @@
 @MissingNullInOutFunction
 public class GetOverlappingIntervalDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new GetOverlappingIntervalDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = GetOverlappingIntervalDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/GetYearMonthDurationDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/GetYearMonthDurationDescriptor.java
index 0944e5d..43fa3fd 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/GetYearMonthDurationDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/GetYearMonthDurationDescriptor.java
@@ -26,7 +26,6 @@
 import org.apache.asterix.om.base.AMutableYearMonthDuration;
 import org.apache.asterix.om.base.AYearMonthDuration;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -48,13 +47,7 @@
 public class GetYearMonthDurationDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
     public final static FunctionIdentifier FID = BuiltinFunctions.GET_YEAR_MONTH_DURATION;
-    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new GetYearMonthDurationDescriptor();
-        }
-    };
+    public final static IFunctionDescriptorFactory FACTORY = GetYearMonthDurationDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalAfterDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalAfterDescriptor.java
index bb95153..5f141d4 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalAfterDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalAfterDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.pointables.nonvisitor.AIntervalPointable;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -31,13 +30,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new IntervalAfterDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = IntervalAfterDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalBeforeDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalBeforeDescriptor.java
index 1eee566..718ad59 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalBeforeDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalBeforeDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.pointables.nonvisitor.AIntervalPointable;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -31,13 +30,7 @@
 
     private final static long serialVersionUID = 1L;
 
-    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new IntervalBeforeDescriptor();
-        }
-    };
+    public final static IFunctionDescriptorFactory FACTORY = IntervalBeforeDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalBinDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalBinDescriptor.java
index d3ecac7..2cd6300 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalBinDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalBinDescriptor.java
@@ -32,7 +32,6 @@
 import org.apache.asterix.om.base.temporal.DurationArithmeticOperations;
 import org.apache.asterix.om.base.temporal.GregorianCalendarSystem;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -59,13 +58,7 @@
 public class IntervalBinDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new IntervalBinDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = IntervalBinDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalCoveredByDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalCoveredByDescriptor.java
index 7d0c590..60d14ac 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalCoveredByDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalCoveredByDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.pointables.nonvisitor.AIntervalPointable;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -31,13 +30,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new IntervalCoveredByDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = IntervalCoveredByDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalCoversDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalCoversDescriptor.java
index 4eff00a..504baac 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalCoversDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalCoversDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.pointables.nonvisitor.AIntervalPointable;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -31,13 +30,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new IntervalCoversDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = IntervalCoversDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalEndedByDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalEndedByDescriptor.java
index f5b6589..b9e414d 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalEndedByDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalEndedByDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.pointables.nonvisitor.AIntervalPointable;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -31,13 +30,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new IntervalEndedByDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = IntervalEndedByDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalEndsDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalEndsDescriptor.java
index e5d1a27..7fc8ffb 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalEndsDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalEndsDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.pointables.nonvisitor.AIntervalPointable;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -30,13 +29,7 @@
 public class IntervalEndsDescriptor extends AbstractIntervalLogicFuncDescriptor {
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new IntervalEndsDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = IntervalEndsDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalMeetsDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalMeetsDescriptor.java
index 8fec043..ba3e1ed 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalMeetsDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalMeetsDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.pointables.nonvisitor.AIntervalPointable;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -31,13 +30,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new IntervalMeetsDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = IntervalMeetsDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalMetByDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalMetByDescriptor.java
index b526c20..c92bd24 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalMetByDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalMetByDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.pointables.nonvisitor.AIntervalPointable;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -31,13 +30,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new IntervalMetByDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = IntervalMetByDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalOverlappedByDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalOverlappedByDescriptor.java
index ec335e8..7cd9775 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalOverlappedByDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalOverlappedByDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.pointables.nonvisitor.AIntervalPointable;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -31,13 +30,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new IntervalOverlappedByDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = IntervalOverlappedByDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalOverlapsDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalOverlapsDescriptor.java
index 1968908..6884309 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalOverlapsDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalOverlapsDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.pointables.nonvisitor.AIntervalPointable;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -31,13 +30,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new IntervalOverlapsDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = IntervalOverlapsDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalStartedByDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalStartedByDescriptor.java
index a474f7e..33386b4 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalStartedByDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalStartedByDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.pointables.nonvisitor.AIntervalPointable;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -31,13 +30,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new IntervalStartedByDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = IntervalStartedByDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalStartsDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalStartsDescriptor.java
index 77dec6c..8021a16 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalStartsDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/IntervalStartsDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.pointables.nonvisitor.AIntervalPointable;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -31,13 +30,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new IntervalStartsDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = IntervalStartsDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/MillisecondsFromDayTimeDurationDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/MillisecondsFromDayTimeDurationDescriptor.java
index 6a71c60..adb0a1a 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/MillisecondsFromDayTimeDurationDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/MillisecondsFromDayTimeDurationDescriptor.java
@@ -26,7 +26,6 @@
 import org.apache.asterix.om.base.AInt64;
 import org.apache.asterix.om.base.AMutableInt64;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -48,13 +47,7 @@
 public class MillisecondsFromDayTimeDurationDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private final static long serialVersionUID = 1L;
     public final static FunctionIdentifier FID = BuiltinFunctions.MILLISECONDS_FROM_DAY_TIME_DURATION;
-    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new MillisecondsFromDayTimeDurationDescriptor();
-        }
-    };
+    public final static IFunctionDescriptorFactory FACTORY = MillisecondsFromDayTimeDurationDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/MonthsFromYearMonthDurationDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/MonthsFromYearMonthDurationDescriptor.java
index 96d7184..c428b4d 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/MonthsFromYearMonthDurationDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/MonthsFromYearMonthDurationDescriptor.java
@@ -26,7 +26,6 @@
 import org.apache.asterix.om.base.AInt64;
 import org.apache.asterix.om.base.AMutableInt64;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -48,13 +47,7 @@
 public class MonthsFromYearMonthDurationDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private final static long serialVersionUID = 1L;
     public final static FunctionIdentifier FID = BuiltinFunctions.MONTHS_FROM_YEAR_MONTH_DURATION;
-    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new MonthsFromYearMonthDurationDescriptor();
-        }
-    };
+    public final static IFunctionDescriptorFactory FACTORY = MonthsFromYearMonthDurationDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/OverlapBinsDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/OverlapBinsDescriptor.java
index 56f6633..a470464 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/OverlapBinsDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/OverlapBinsDescriptor.java
@@ -35,7 +35,6 @@
 import org.apache.asterix.om.base.temporal.DurationArithmeticOperations;
 import org.apache.asterix.om.base.temporal.GregorianCalendarSystem;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.AOrderedListType;
 import org.apache.asterix.om.types.ATypeTag;
@@ -63,13 +62,7 @@
 public class OverlapBinsDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new OverlapBinsDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = OverlapBinsDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/OverlapDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/OverlapDescriptor.java
index 5c12752..f886697 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/OverlapDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/OverlapDescriptor.java
@@ -20,7 +20,6 @@
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.pointables.nonvisitor.AIntervalPointable;
 import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -31,12 +30,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new OverlapDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = OverlapDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/ParseDateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/ParseDateDescriptor.java
index f31cef7..58273ca 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/ParseDateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/ParseDateDescriptor.java
@@ -29,7 +29,6 @@
 import org.apache.asterix.om.base.temporal.DateTimeFormatUtils.DateTimeParseMode;
 import org.apache.asterix.om.base.temporal.GregorianCalendarSystem;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -61,12 +60,7 @@
 public class ParseDateDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
 
-    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new ParseDateDescriptor();
-        }
-    };
+    public final static IFunctionDescriptorFactory FACTORY = ParseDateDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/ParseDateTimeDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/ParseDateTimeDescriptor.java
index 49dec79..8596dab 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/ParseDateTimeDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/ParseDateTimeDescriptor.java
@@ -28,7 +28,6 @@
 import org.apache.asterix.om.base.temporal.DateTimeFormatUtils;
 import org.apache.asterix.om.base.temporal.DateTimeFormatUtils.DateTimeParseMode;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -52,12 +51,7 @@
 public class ParseDateTimeDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
 
-    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new ParseDateTimeDescriptor();
-        }
-    };
+    public final static IFunctionDescriptorFactory FACTORY = ParseDateTimeDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/ParseTimeDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/ParseTimeDescriptor.java
index 606e65e..15bd366 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/ParseTimeDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/ParseTimeDescriptor.java
@@ -28,7 +28,6 @@
 import org.apache.asterix.om.base.temporal.DateTimeFormatUtils;
 import org.apache.asterix.om.base.temporal.DateTimeFormatUtils.DateTimeParseMode;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -52,12 +51,7 @@
 public class ParseTimeDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
 
-    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new ParseTimeDescriptor();
-        }
-    };
+    public final static IFunctionDescriptorFactory FACTORY = ParseTimeDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/PrintDateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/PrintDateDescriptor.java
index a0da3d1..ff787ee 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/PrintDateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/PrintDateDescriptor.java
@@ -27,7 +27,6 @@
 import org.apache.asterix.om.base.temporal.DateTimeFormatUtils.DateTimeParseMode;
 import org.apache.asterix.om.base.temporal.GregorianCalendarSystem;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
@@ -49,13 +48,7 @@
 public class PrintDateDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
 
-    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new PrintDateDescriptor();
-        }
-    };
+    public final static IFunctionDescriptorFactory FACTORY = PrintDateDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/PrintDateTimeDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/PrintDateTimeDescriptor.java
index 34961cd..f1d28df 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/PrintDateTimeDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/PrintDateTimeDescriptor.java
@@ -26,7 +26,6 @@
 import org.apache.asterix.om.base.temporal.DateTimeFormatUtils;
 import org.apache.asterix.om.base.temporal.DateTimeFormatUtils.DateTimeParseMode;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
@@ -48,13 +47,7 @@
 public class PrintDateTimeDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
 
-    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new PrintDateTimeDescriptor();
-        }
-    };
+    public final static IFunctionDescriptorFactory FACTORY = PrintDateTimeDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/PrintTimeDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/PrintTimeDescriptor.java
index 9cf07df..568ffcb 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/PrintTimeDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/PrintTimeDescriptor.java
@@ -26,7 +26,6 @@
 import org.apache.asterix.om.base.temporal.DateTimeFormatUtils;
 import org.apache.asterix.om.base.temporal.DateTimeFormatUtils.DateTimeParseMode;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
@@ -48,13 +47,7 @@
 public class PrintTimeDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
 
-    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new PrintTimeDescriptor();
-        }
-    };
+    public final static IFunctionDescriptorFactory FACTORY = PrintTimeDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/TimeFromDatetimeDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/TimeFromDatetimeDescriptor.java
index f57b32c..4771bc3 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/TimeFromDatetimeDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/TimeFromDatetimeDescriptor.java
@@ -27,7 +27,6 @@
 import org.apache.asterix.om.base.ATime;
 import org.apache.asterix.om.base.temporal.GregorianCalendarSystem;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -50,14 +49,7 @@
 
     private static final long serialVersionUID = 1L;
     public final static FunctionIdentifier FID = BuiltinFunctions.TIME_FROM_DATETIME;
-    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new TimeFromDatetimeDescriptor();
-        }
-
-    };
+    public final static IFunctionDescriptorFactory FACTORY = TimeFromDatetimeDescriptor::new;
 
     /* (non-Javadoc)
      * @see org.apache.asterix.runtime.base.IScalarFunctionDynamicDescriptor#createEvaluatorFactory(org.apache.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory[])
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/TimeFromUnixTimeInMsDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/TimeFromUnixTimeInMsDescriptor.java
index f074d8c..b3cc2c0 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/TimeFromUnixTimeInMsDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/TimeFromUnixTimeInMsDescriptor.java
@@ -25,7 +25,6 @@
 import org.apache.asterix.om.base.AMutableTime;
 import org.apache.asterix.om.base.ATime;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.BuiltinType;
 import org.apache.asterix.om.types.hierachy.ATypeHierarchy;
@@ -46,13 +45,7 @@
 public class TimeFromUnixTimeInMsDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private final static long serialVersionUID = 1L;
     public final static FunctionIdentifier FID = BuiltinFunctions.TIME_FROM_UNIX_TIME_IN_MS;
-    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new TimeFromUnixTimeInMsDescriptor();
-        }
-    };
+    public final static IFunctionDescriptorFactory FACTORY = TimeFromUnixTimeInMsDescriptor::new;
 
     /* (non-Javadoc)
      * @see org.apache.asterix.runtime.base.IScalarFunctionDynamicDescriptor#createEvaluatorFactory(org.apache.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory[])
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/UnixTimeFromDateInDaysDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/UnixTimeFromDateInDaysDescriptor.java
index 2334438..930759a 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/UnixTimeFromDateInDaysDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/UnixTimeFromDateInDaysDescriptor.java
@@ -26,7 +26,6 @@
 import org.apache.asterix.om.base.AInt64;
 import org.apache.asterix.om.base.AMutableInt64;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -48,13 +47,7 @@
 public class UnixTimeFromDateInDaysDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new UnixTimeFromDateInDaysDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = UnixTimeFromDateInDaysDescriptor::new;
 
     @Override
     public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/UnixTimeFromTimeInMsDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/UnixTimeFromTimeInMsDescriptor.java
index 53071a1..184d0ad 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/UnixTimeFromTimeInMsDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/UnixTimeFromTimeInMsDescriptor.java
@@ -26,7 +26,6 @@
 import org.apache.asterix.om.base.AInt64;
 import org.apache.asterix.om.base.AMutableInt64;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.BuiltinType;
@@ -47,12 +46,7 @@
 @MissingNullInOutFunction
 public class UnixTimeFromTimeInMsDescriptor extends AbstractScalarFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new UnixTimeFromTimeInMsDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = UnixTimeFromTimeInMsDescriptor::new;
 
     /* (non-Javadoc)
      * @see org.apache.asterix.runtime.base.IScalarFunctionDynamicDescriptor#createEvaluatorFactory(org.apache.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory[])
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/YearMonthDurationGreaterThanComparatorDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/YearMonthDurationGreaterThanComparatorDescriptor.java
index dbc3466..d865576 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/YearMonthDurationGreaterThanComparatorDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/YearMonthDurationGreaterThanComparatorDescriptor.java
@@ -20,20 +20,13 @@
 package org.apache.asterix.runtime.evaluators.functions.temporal;
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 
 @MissingNullInOutFunction
 public class YearMonthDurationGreaterThanComparatorDescriptor extends YearMonthDurationComparatorDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new YearMonthDurationGreaterThanComparatorDescriptor();
-        }
-    };
+    public final static IFunctionDescriptorFactory FACTORY = YearMonthDurationGreaterThanComparatorDescriptor::new;
 
     protected YearMonthDurationGreaterThanComparatorDescriptor() {
         super(true);
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/YearMonthDurationLessThanComparatorDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/YearMonthDurationLessThanComparatorDescriptor.java
index 2f32eed..6e03766 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/YearMonthDurationLessThanComparatorDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/temporal/YearMonthDurationLessThanComparatorDescriptor.java
@@ -20,20 +20,13 @@
 package org.apache.asterix.runtime.evaluators.functions.temporal;
 
 import org.apache.asterix.common.annotations.MissingNullInOutFunction;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 
 @MissingNullInOutFunction
 public class YearMonthDurationLessThanComparatorDescriptor extends YearMonthDurationComparatorDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new YearMonthDurationLessThanComparatorDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = YearMonthDurationLessThanComparatorDescriptor::new;
 
     protected YearMonthDurationLessThanComparatorDescriptor() {
         super(false);
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/runningaggregates/std/TidRunningAggregateDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/runningaggregates/std/TidRunningAggregateDescriptor.java
index 0306118..95de235 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/runningaggregates/std/TidRunningAggregateDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/runningaggregates/std/TidRunningAggregateDescriptor.java
@@ -22,7 +22,6 @@
 import org.apache.asterix.om.base.AInt64;
 import org.apache.asterix.om.base.AMutableInt64;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.BuiltinType;
 import org.apache.asterix.runtime.runningaggregates.base.AbstractRunningAggregateFunctionDynamicDescriptor;
@@ -40,12 +39,7 @@
 public class TidRunningAggregateDescriptor extends AbstractRunningAggregateFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new TidRunningAggregateDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = TidRunningAggregateDescriptor::new;
 
     @Override
     public IRunningAggregateEvaluatorFactory createRunningAggregateEvaluatorFactory(IScalarEvaluatorFactory[] args) {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/unnestingfunctions/std/RangeDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/unnestingfunctions/std/RangeDescriptor.java
index dbaee0c..2292519 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/unnestingfunctions/std/RangeDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/unnestingfunctions/std/RangeDescriptor.java
@@ -21,7 +21,6 @@
 import org.apache.asterix.formats.nontagged.SerializerDeserializerProvider;
 import org.apache.asterix.om.base.AMutableInt64;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.BuiltinType;
 import org.apache.asterix.om.types.hierachy.ATypeHierarchy;
@@ -43,12 +42,7 @@
 
     private static final long serialVersionUID = 1L;
 
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new RangeDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = RangeDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/unnestingfunctions/std/ScanCollectionDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/unnestingfunctions/std/ScanCollectionDescriptor.java
index 1e956cf..ff6dd89 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/unnestingfunctions/std/ScanCollectionDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/unnestingfunctions/std/ScanCollectionDescriptor.java
@@ -22,7 +22,6 @@
 import java.io.IOException;
 
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.runtime.evaluators.common.ListAccessor;
@@ -44,12 +43,7 @@
 public class ScanCollectionDescriptor extends AbstractUnnestingFunctionDynamicDescriptor {
 
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new ScanCollectionDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = ScanCollectionDescriptor::new;
 
     @Override
     public FunctionIdentifier getIdentifier() {
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/unnestingfunctions/std/SubsetCollectionDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/unnestingfunctions/std/SubsetCollectionDescriptor.java
index c441a4e..7f5aa0a 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/unnestingfunctions/std/SubsetCollectionDescriptor.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/unnestingfunctions/std/SubsetCollectionDescriptor.java
@@ -25,7 +25,6 @@
 import org.apache.asterix.dataflow.data.nontagged.serde.AOrderedListSerializerDeserializer;
 import org.apache.asterix.dataflow.data.nontagged.serde.AUnorderedListSerializerDeserializer;
 import org.apache.asterix.om.functions.BuiltinFunctions;
-import org.apache.asterix.om.functions.IFunctionDescriptor;
 import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
 import org.apache.asterix.om.types.ATypeTag;
 import org.apache.asterix.om.types.EnumDeserializer;
@@ -46,12 +45,7 @@
 
 public class SubsetCollectionDescriptor extends AbstractUnnestingFunctionDynamicDescriptor {
     private static final long serialVersionUID = 1L;
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        @Override
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new SubsetCollectionDescriptor();
-        }
-    };
+    public static final IFunctionDescriptorFactory FACTORY = SubsetCollectionDescriptor::new;
 
     @Override
     public IUnnestingEvaluatorFactory createUnnestingEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
diff --git a/hyracks-fullstack/hyracks/hyracks-api/src/main/java/org/apache/hyracks/api/client/impl/JobSpecificationActivityClusterGraphGeneratorFactory.java b/hyracks-fullstack/hyracks/hyracks-api/src/main/java/org/apache/hyracks/api/client/impl/JobSpecificationActivityClusterGraphGeneratorFactory.java
index eb68e79..4773dc4 100644
--- a/hyracks-fullstack/hyracks/hyracks-api/src/main/java/org/apache/hyracks/api/client/impl/JobSpecificationActivityClusterGraphGeneratorFactory.java
+++ b/hyracks-fullstack/hyracks/hyracks-api/src/main/java/org/apache/hyracks/api/client/impl/JobSpecificationActivityClusterGraphGeneratorFactory.java
@@ -53,12 +53,7 @@
     public IActivityClusterGraphGenerator createActivityClusterGraphGenerator(final ICCServiceContext ccServiceCtx,
             Set<JobFlag> jobFlags) throws HyracksException {
         final JobActivityGraphBuilder builder = new JobActivityGraphBuilder(spec, jobFlags);
-        PlanUtils.visit(spec, new IConnectorDescriptorVisitor() {
-            @Override
-            public void visit(IConnectorDescriptor conn) throws HyracksException {
-                builder.addConnector(conn);
-            }
-        });
+        PlanUtils.visit(spec, builder::addConnector);
         PlanUtils.visit(spec, new IOperatorDescriptorVisitor() {
             @Override
             public void visit(IOperatorDescriptor op) {
@@ -78,12 +73,7 @@
         acg.setConnectorPolicyAssignmentPolicy(spec.getConnectorPolicyAssignmentPolicy());
         acg.setUseConnectorPolicyForScheduling(spec.isUseConnectorPolicyForScheduling());
         final Set<Constraint> constraints = new HashSet<>();
-        final IConstraintAcceptor acceptor = new IConstraintAcceptor() {
-            @Override
-            public void addConstraint(Constraint constraint) {
-                constraints.add(constraint);
-            }
-        };
+        final IConstraintAcceptor acceptor = constraints::add;
         PlanUtils.visit(spec, new IOperatorDescriptorVisitor() {
             @Override
             public void visit(IOperatorDescriptor op) {
diff --git a/hyracks-fullstack/hyracks/hyracks-dataflow-std/src/main/java/org/apache/hyracks/dataflow/std/sort/TupleSorterHeapSort.java b/hyracks-fullstack/hyracks/hyracks-dataflow-std/src/main/java/org/apache/hyracks/dataflow/std/sort/TupleSorterHeapSort.java
index 46d62a7..08f15b3 100644
--- a/hyracks-fullstack/hyracks/hyracks-dataflow-std/src/main/java/org/apache/hyracks/dataflow/std/sort/TupleSorterHeapSort.java
+++ b/hyracks-fullstack/hyracks/hyracks-dataflow-std/src/main/java/org/apache/hyracks/dataflow/std/sort/TupleSorterHeapSort.java
@@ -272,12 +272,7 @@
         isSorted = true;
     }
 
-    private static final Comparator<IResetableComparable> entryComparator = new Comparator<IResetableComparable>() {
-        @Override
-        public int compare(IResetableComparable o1, IResetableComparable o2) {
-            return o1.compareTo(o2);
-        }
-    };
+    private static final Comparator<IResetableComparable> entryComparator = Comparable::compareTo;
 
     @Override
     public void close() throws HyracksDataException {
diff --git a/hyracks-fullstack/hyracks/hyracks-examples/btree-example/btreehelper/src/main/java/org/apache/hyracks/examples/btree/helper/RuntimeContext.java b/hyracks-fullstack/hyracks/hyracks-examples/btree-example/btreehelper/src/main/java/org/apache/hyracks/examples/btree/helper/RuntimeContext.java
index 7ba81e1..3aa3d23 100644
--- a/hyracks-fullstack/hyracks/hyracks-examples/btree-example/btreehelper/src/main/java/org/apache/hyracks/examples/btree/helper/RuntimeContext.java
+++ b/hyracks-fullstack/hyracks/hyracks-examples/btree-example/btreehelper/src/main/java/org/apache/hyracks/examples/btree/helper/RuntimeContext.java
@@ -48,12 +48,7 @@
     private ILocalResourceRepository localResourceRepository;
     private IResourceLifecycleManager<IIndex> lcManager;
     private ResourceIdFactory resourceIdFactory;
-    private ThreadFactory threadFactory = new ThreadFactory() {
-        @Override
-        public Thread newThread(Runnable r) {
-            return new Thread(r);
-        }
-    };
+    private ThreadFactory threadFactory = Thread::new;
 
     public RuntimeContext(INCServiceContext appCtx) throws HyracksDataException {
         fileMapManager = new FileMapManager();
diff --git a/hyracks-fullstack/hyracks/hyracks-storage-am-rtree/src/main/java/org/apache/hyracks/storage/am/rtree/impls/DoublePrimitiveValueProviderFactory.java b/hyracks-fullstack/hyracks/hyracks-storage-am-rtree/src/main/java/org/apache/hyracks/storage/am/rtree/impls/DoublePrimitiveValueProviderFactory.java
index 14c5eac..4398297 100644
--- a/hyracks-fullstack/hyracks/hyracks-storage-am-rtree/src/main/java/org/apache/hyracks/storage/am/rtree/impls/DoublePrimitiveValueProviderFactory.java
+++ b/hyracks-fullstack/hyracks/hyracks-storage-am-rtree/src/main/java/org/apache/hyracks/storage/am/rtree/impls/DoublePrimitiveValueProviderFactory.java
@@ -37,12 +37,7 @@
 
     @Override
     public IPrimitiveValueProvider createPrimitiveValueProvider() {
-        return new IPrimitiveValueProvider() {
-            @Override
-            public double getValue(byte[] bytes, int offset) {
-                return DoublePointable.getDouble(bytes, offset);
-            }
-        };
+        return DoublePointable::getDouble;
     }
 
     @Override
diff --git a/hyracks-fullstack/hyracks/hyracks-storage-am-rtree/src/main/java/org/apache/hyracks/storage/am/rtree/impls/FloatPrimitiveValueProviderFactory.java b/hyracks-fullstack/hyracks/hyracks-storage-am-rtree/src/main/java/org/apache/hyracks/storage/am/rtree/impls/FloatPrimitiveValueProviderFactory.java
index f3c4b62..1793c76 100644
--- a/hyracks-fullstack/hyracks/hyracks-storage-am-rtree/src/main/java/org/apache/hyracks/storage/am/rtree/impls/FloatPrimitiveValueProviderFactory.java
+++ b/hyracks-fullstack/hyracks/hyracks-storage-am-rtree/src/main/java/org/apache/hyracks/storage/am/rtree/impls/FloatPrimitiveValueProviderFactory.java
@@ -37,12 +37,7 @@
 
     @Override
     public IPrimitiveValueProvider createPrimitiveValueProvider() {
-        return new IPrimitiveValueProvider() {
-            @Override
-            public double getValue(byte[] bytes, int offset) {
-                return FloatPointable.getFloat(bytes, offset);
-            }
-        };
+        return FloatPointable::getFloat;
     }
 
     @Override
diff --git a/hyracks-fullstack/hyracks/hyracks-storage-am-rtree/src/main/java/org/apache/hyracks/storage/am/rtree/impls/IntegerPrimitiveValueProviderFactory.java b/hyracks-fullstack/hyracks/hyracks-storage-am-rtree/src/main/java/org/apache/hyracks/storage/am/rtree/impls/IntegerPrimitiveValueProviderFactory.java
index 3e26d82..cdec59f 100644
--- a/hyracks-fullstack/hyracks/hyracks-storage-am-rtree/src/main/java/org/apache/hyracks/storage/am/rtree/impls/IntegerPrimitiveValueProviderFactory.java
+++ b/hyracks-fullstack/hyracks/hyracks-storage-am-rtree/src/main/java/org/apache/hyracks/storage/am/rtree/impls/IntegerPrimitiveValueProviderFactory.java
@@ -37,12 +37,7 @@
 
     @Override
     public IPrimitiveValueProvider createPrimitiveValueProvider() {
-        return new IPrimitiveValueProvider() {
-            @Override
-            public double getValue(byte[] bytes, int offset) {
-                return IntegerPointable.getInteger(bytes, offset);
-            }
-        };
+        return IntegerPointable::getInteger;
     }
 
     @Override
diff --git a/hyracks-fullstack/hyracks/hyracks-test-support/src/main/java/org/apache/hyracks/test/support/TestStorageManagerComponentHolder.java b/hyracks-fullstack/hyracks/hyracks-test-support/src/main/java/org/apache/hyracks/test/support/TestStorageManagerComponentHolder.java
index a2da285..ee10176 100644
--- a/hyracks-fullstack/hyracks/hyracks-test-support/src/main/java/org/apache/hyracks/test/support/TestStorageManagerComponentHolder.java
+++ b/hyracks-fullstack/hyracks/hyracks-test-support/src/main/java/org/apache/hyracks/test/support/TestStorageManagerComponentHolder.java
@@ -63,12 +63,7 @@
     private static int pageSize;
     private static int numPages;
     private static int maxOpenFiles;
-    private final static ThreadFactory threadFactory = new ThreadFactory() {
-        @Override
-        public Thread newThread(Runnable r) {
-            return new Thread(r);
-        }
-    };
+    private final static ThreadFactory threadFactory = Thread::new;
 
     public static void init(int pageSize, int numPages, int maxOpenFiles) {
         TestStorageManagerComponentHolder.pageSize = pageSize;
diff --git a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/perf/LSMTreeRunner.java b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/perf/LSMTreeRunner.java
index 1b46fd7..6126040 100644
--- a/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/perf/LSMTreeRunner.java
+++ b/hyracks-fullstack/hyracks/hyracks-tests/hyracks-storage-am-lsm-btree-test/src/test/java/org/apache/hyracks/storage/am/lsm/btree/perf/LSMTreeRunner.java
@@ -81,12 +81,7 @@
     protected IBufferCache memBufferCache;
     private final int onDiskPageSize;
     private final int onDiskNumPages;
-    private final static ThreadFactory threadFactory = new ThreadFactory() {
-        @Override
-        public Thread newThread(Runnable r) {
-            return new Thread(r);
-        }
-    };
+    private final static ThreadFactory threadFactory = Thread::new;
 
     public LSMTreeRunner(int numBatches, int inMemPageSize, int inMemNumPages, int onDiskPageSize, int onDiskNumPages,
             ITypeTraits[] typeTraits, IBinaryComparatorFactory[] cmpFactories, int[] bloomFilterKeyFields,