diff --git a/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/rules/am/BTreeAccessMethod.java b/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/rules/am/BTreeAccessMethod.java
index ddcf768..5bd9dfc 100644
--- a/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/rules/am/BTreeAccessMethod.java
+++ b/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/rules/am/BTreeAccessMethod.java
@@ -27,10 +27,10 @@
 import org.apache.commons.lang3.mutable.Mutable;
 import org.apache.commons.lang3.mutable.MutableObject;
 
+import edu.uci.ics.asterix.aql.util.FunctionUtils;
 import edu.uci.ics.asterix.common.config.DatasetConfig.IndexType;
 import edu.uci.ics.asterix.metadata.entities.Dataset;
 import edu.uci.ics.asterix.metadata.entities.Index;
-import edu.uci.ics.asterix.om.functions.AsterixBuiltinFunctions;
 import edu.uci.ics.asterix.om.types.ARecordType;
 import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
 import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalExpression;
@@ -565,7 +565,7 @@
 
     private ILogicalExpression createSelectCondition(List<Mutable<ILogicalExpression>> predList) {
         if (predList.size() > 1) {
-            IFunctionInfo finfo = AsterixBuiltinFunctions.getAsterixFunctionInfo(AlgebricksBuiltinFunctions.AND);
+            IFunctionInfo finfo = FunctionUtils.getFunctionInfo(AlgebricksBuiltinFunctions.AND);
             return new ScalarFunctionCallExpression(finfo, predList);
         }
         return predList.get(0).getValue();
diff --git a/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/rules/typecast/StaticTypeCastUtil.java b/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/rules/typecast/StaticTypeCastUtil.java
index d25dba3..067df9c 100644
--- a/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/rules/typecast/StaticTypeCastUtil.java
+++ b/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/rules/typecast/StaticTypeCastUtil.java
@@ -29,7 +29,6 @@
 import edu.uci.ics.asterix.om.base.AString;
 import edu.uci.ics.asterix.om.constants.AsterixConstantValue;
 import edu.uci.ics.asterix.om.functions.AsterixBuiltinFunctions;
-import edu.uci.ics.asterix.om.functions.AsterixFunctionInfo;
 import edu.uci.ics.asterix.om.pointables.base.DefaultOpenFieldType;
 import edu.uci.ics.asterix.om.typecomputer.base.TypeComputerUtilities;
 import edu.uci.ics.asterix.om.types.ARecordType;
@@ -331,7 +330,7 @@
                             matched = true;
 
                             ScalarFunctionCallExpression notNullFunc = new ScalarFunctionCallExpression(
-                                    new AsterixFunctionInfo(AsterixBuiltinFunctions.NOT_NULL));
+                                    FunctionUtils.getFunctionInfo(AsterixBuiltinFunctions.NOT_NULL));
                             notNullFunc.getArguments().add(new MutableObject<ILogicalExpression>(arg));
                             //wrap the not null function to the original function
                             func.getArguments().get(2 * i + 1).setValue(notNullFunc);
diff --git a/asterix-algebra/src/main/java/edu/uci/ics/asterix/translator/AqlExpressionToPlanTranslator.java b/asterix-algebra/src/main/java/edu/uci/ics/asterix/translator/AqlExpressionToPlanTranslator.java
index d758181..784f023 100644
--- a/asterix-algebra/src/main/java/edu/uci/ics/asterix/translator/AqlExpressionToPlanTranslator.java
+++ b/asterix-algebra/src/main/java/edu/uci/ics/asterix/translator/AqlExpressionToPlanTranslator.java
@@ -28,7 +28,6 @@
 import edu.uci.ics.asterix.aql.base.Expression.Kind;
 import edu.uci.ics.asterix.aql.expression.CallExpr;
 import edu.uci.ics.asterix.aql.expression.ConnectFeedStatement;
-import edu.uci.ics.asterix.aql.expression.DisconnectFeedStatement;
 import edu.uci.ics.asterix.aql.expression.CreateDataverseStatement;
 import edu.uci.ics.asterix.aql.expression.CreateFeedStatement;
 import edu.uci.ics.asterix.aql.expression.CreateFunctionStatement;
@@ -37,6 +36,7 @@
 import edu.uci.ics.asterix.aql.expression.DataverseDecl;
 import edu.uci.ics.asterix.aql.expression.DataverseDropStatement;
 import edu.uci.ics.asterix.aql.expression.DeleteStatement;
+import edu.uci.ics.asterix.aql.expression.DisconnectFeedStatement;
 import edu.uci.ics.asterix.aql.expression.DistinctClause;
 import edu.uci.ics.asterix.aql.expression.DropStatement;
 import edu.uci.ics.asterix.aql.expression.FLWOGRExpression;
@@ -94,13 +94,12 @@
 import edu.uci.ics.asterix.formats.base.IDataFormat;
 import edu.uci.ics.asterix.metadata.MetadataException;
 import edu.uci.ics.asterix.metadata.MetadataManager;
-import edu.uci.ics.asterix.metadata.declared.AqlDataSource;
+import edu.uci.ics.asterix.metadata.declared.AqlDataSource.AqlDataSourceType;
 import edu.uci.ics.asterix.metadata.declared.AqlMetadataProvider;
 import edu.uci.ics.asterix.metadata.declared.AqlSourceId;
 import edu.uci.ics.asterix.metadata.declared.DatasetDataSource;
 import edu.uci.ics.asterix.metadata.declared.ResultSetDataSink;
 import edu.uci.ics.asterix.metadata.declared.ResultSetSinkId;
-import edu.uci.ics.asterix.metadata.declared.AqlDataSource.AqlDataSourceType;
 import edu.uci.ics.asterix.metadata.entities.Dataset;
 import edu.uci.ics.asterix.metadata.entities.Function;
 import edu.uci.ics.asterix.metadata.functions.ExternalFunctionCompilerUtil;
@@ -224,10 +223,9 @@
             @SuppressWarnings("unchecked")
             /** This assign adds a marker function collection-to-sequence: if the input is a singleton collection, unnest it; otherwise do nothing. */
             AssignOperator assignCollectionToSequence = new AssignOperator(seqVar,
-                    new MutableObject<ILogicalExpression>(
-                            new ScalarFunctionCallExpression(AsterixBuiltinFunctions
-                                    .getAsterixFunctionInfo(AsterixBuiltinFunctions.COLLECTION_TO_SEQUENCE),
-                                    new MutableObject<ILogicalExpression>(new VariableReferenceExpression(resVar)))));
+                    new MutableObject<ILogicalExpression>(new ScalarFunctionCallExpression(
+                            FunctionUtils.getFunctionInfo(AsterixBuiltinFunctions.COLLECTION_TO_SEQUENCE),
+                            new MutableObject<ILogicalExpression>(new VariableReferenceExpression(resVar)))));
             assignCollectionToSequence.getInputs().add(
                     new MutableObject<ILogicalOperator>(project.getInputs().get(0).getValue()));
             project.getInputs().get(0).setValue(assignCollectionToSequence);
@@ -241,8 +239,7 @@
             List<Mutable<ILogicalExpression>> varRefsForLoading = new ArrayList<Mutable<ILogicalExpression>>();
             List<String> partitionKeys = DatasetUtils.getPartitioningKeys(targetDatasource.getDataset());
             for (String keyFieldName : partitionKeys) {
-                IFunctionInfo finfoAccess = AsterixBuiltinFunctions
-                        .getAsterixFunctionInfo(AsterixBuiltinFunctions.FIELD_ACCESS_BY_NAME);
+                IFunctionInfo finfoAccess = FunctionUtils.getFunctionInfo(AsterixBuiltinFunctions.FIELD_ACCESS_BY_NAME);
                 @SuppressWarnings("unchecked")
                 ScalarFunctionCallExpression f = new ScalarFunctionCallExpression(finfoAccess,
                         new MutableObject<ILogicalExpression>(new VariableReferenceExpression(METADATA_DUMMY_VAR)),
@@ -518,7 +515,7 @@
                     metadataProvider.getMetadataTxnContext(), function);
             f = new ScalarFunctionCallExpression(finfo, args);
         } else if (function.getLanguage().equalsIgnoreCase(Function.LANGUAGE_AQL)) {
-            IFunctionInfo finfo = new AsterixFunctionInfo(signature);
+            IFunctionInfo finfo = FunctionUtils.getFunctionInfo(signature);
             f = new ScalarFunctionCallExpression(finfo, args);
         } else {
             throw new MetadataException(" User defined functions written in " + function.getLanguage()
diff --git a/asterix-aql/src/main/java/edu/uci/ics/asterix/aql/util/FunctionUtils.java b/asterix-aql/src/main/java/edu/uci/ics/asterix/aql/util/FunctionUtils.java
index 1b0cfbe..18695c3 100644
--- a/asterix-aql/src/main/java/edu/uci/ics/asterix/aql/util/FunctionUtils.java
+++ b/asterix-aql/src/main/java/edu/uci/ics/asterix/aql/util/FunctionUtils.java
@@ -25,6 +25,7 @@
 import edu.uci.ics.asterix.aql.parser.AQLParser;
 import edu.uci.ics.asterix.aql.parser.ParseException;
 import edu.uci.ics.asterix.common.exceptions.AsterixException;
+import edu.uci.ics.asterix.common.functions.FunctionSignature;
 import edu.uci.ics.asterix.metadata.entities.Function;
 import edu.uci.ics.asterix.om.functions.AsterixBuiltinFunctions;
 import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
@@ -76,4 +77,8 @@
         return AsterixBuiltinFunctions.getAsterixFunctionInfo(fi);
     }
 
+    public static IFunctionInfo getFunctionInfo(FunctionSignature fs) {
+        return getFunctionInfo(new FunctionIdentifier(fs.getNamespace(), fs.getName(), fs.getArity()));
+    }
+
 }
diff --git a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/functions/MetadataBuiltinFunctions.java b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/functions/MetadataBuiltinFunctions.java
index 5ab32b5..086caf1 100644
--- a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/functions/MetadataBuiltinFunctions.java
+++ b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/functions/MetadataBuiltinFunctions.java
@@ -87,7 +87,7 @@
                 }
                 return t2;
             }
-        });
+        }, true);
 
         AsterixBuiltinFunctions.addPrivateFunction(AsterixBuiltinFunctions.FEED_INGEST, new IResultTypeComputer() {
 
@@ -125,7 +125,7 @@
                 }
                 return t2;
             }
-        });
+        }, true);
 
         AsterixBuiltinFunctions.addFunction(AsterixBuiltinFunctions.FEED_INTERCEPT, new IResultTypeComputer() {
 
@@ -168,7 +168,7 @@
                 }
                 return t2;
             }
-        });
+        }, true);
     }
 
     private static Pair<String, String> getDatasetInfo(AqlMetadataProvider metadata, String datasetArg) {
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/om/functions/AsterixBuiltinFunctions.java b/asterix-om/src/main/java/edu/uci/ics/asterix/om/functions/AsterixBuiltinFunctions.java
index 27e03b8..118e72b 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/om/functions/AsterixBuiltinFunctions.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/om/functions/AsterixBuiltinFunctions.java
@@ -597,11 +597,7 @@
             FunctionConstants.ASTERIX_NS, "" + "collection-to-sequence", 1);
 
     public static IFunctionInfo getAsterixFunctionInfo(FunctionIdentifier fid) {
-        IFunctionInfo finfo = registeredFunctions.get(fid);
-        if (finfo == null) {
-            finfo = new AsterixFunctionInfo(fid);
-        }
-        return finfo;
+        return registeredFunctions.get(fid);
     }
 
     public static AsterixFunctionInfo lookupFunction(FunctionIdentifier fid) {
@@ -611,74 +607,74 @@
     static {
 
         // first, take care of Algebricks builtin functions
-        addFunction(IS_NULL, ABooleanTypeComputer.INSTANCE);
-        addFunction(NOT, UnaryBooleanOrNullFunctionTypeComputer.INSTANCE);
+        addFunction(IS_NULL, ABooleanTypeComputer.INSTANCE, true);
+        addFunction(NOT, UnaryBooleanOrNullFunctionTypeComputer.INSTANCE, true);
 
-        addPrivateFunction(EQ, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE);
-        addPrivateFunction(LE, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE);
-        addPrivateFunction(GE, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE);
-        addPrivateFunction(LT, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE);
-        addPrivateFunction(GT, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE);
-        addPrivateFunction(AND, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE);
-        addPrivateFunction(NEQ, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE);
-        addPrivateFunction(OR, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE);
-        addPrivateFunction(NUMERIC_ADD, NonTaggedNumericAddSubMulDivTypeComputer.INSTANCE);
+        addPrivateFunction(EQ, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE, true);
+        addPrivateFunction(LE, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE, true);
+        addPrivateFunction(GE, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE, true);
+        addPrivateFunction(LT, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE, true);
+        addPrivateFunction(GT, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE, true);
+        addPrivateFunction(AND, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE, true);
+        addPrivateFunction(NEQ, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE, true);
+        addPrivateFunction(OR, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE, true);
+        addPrivateFunction(NUMERIC_ADD, NonTaggedNumericAddSubMulDivTypeComputer.INSTANCE, true);
 
         // and then, Asterix builtin functions
-        addPrivateFunction(NOT_NULL, NotNullTypeComputer.INSTANCE);
-        addPrivateFunction(ANY_COLLECTION_MEMBER, NonTaggedCollectionMemberResultType.INSTANCE);
-        addFunction(AVG, OptionalADoubleTypeComputer.INSTANCE);
-        addFunction(BOOLEAN_CONSTRUCTOR, UnaryBooleanOrNullFunctionTypeComputer.INSTANCE);
-        addPrivateFunction(CARET, NonTaggedNumericAddSubMulDivTypeComputer.INSTANCE);
-        addFunction(CIRCLE_CONSTRUCTOR, OptionalACircleTypeComputer.INSTANCE);
-        addPrivateFunction(RECORD_MERGE, RecordMergeTypeComputer.INSTANCE);
-        addPrivateFunction(CLOSED_RECORD_CONSTRUCTOR, ClosedRecordConstructorResultType.INSTANCE);
-        addPrivateFunction(CONCAT_NON_NULL, ConcatNonNullTypeComputer.INSTANCE);
+        addPrivateFunction(NOT_NULL, NotNullTypeComputer.INSTANCE, true);
+        addPrivateFunction(ANY_COLLECTION_MEMBER, NonTaggedCollectionMemberResultType.INSTANCE, true);
+        addFunction(AVG, OptionalADoubleTypeComputer.INSTANCE, true);
+        addFunction(BOOLEAN_CONSTRUCTOR, UnaryBooleanOrNullFunctionTypeComputer.INSTANCE, true);
+        addPrivateFunction(CARET, NonTaggedNumericAddSubMulDivTypeComputer.INSTANCE, true);
+        addFunction(CIRCLE_CONSTRUCTOR, OptionalACircleTypeComputer.INSTANCE, true);
+        addPrivateFunction(RECORD_MERGE, RecordMergeTypeComputer.INSTANCE, true);
+        addPrivateFunction(CLOSED_RECORD_CONSTRUCTOR, ClosedRecordConstructorResultType.INSTANCE, true);
+        addPrivateFunction(CONCAT_NON_NULL, ConcatNonNullTypeComputer.INSTANCE, true);
 
-        addFunction(CONTAINS, ABooleanTypeComputer.INSTANCE);
-        addFunction(COUNT, AInt64TypeComputer.INSTANCE);
-        addPrivateFunction(COUNTHASHED_GRAM_TOKENS, OrderedListOfAInt32TypeComputer.INSTANCE);
-        addPrivateFunction(COUNTHASHED_WORD_TOKENS, OrderedListOfAInt32TypeComputer.INSTANCE);
-        addFunction(CREATE_CIRCLE, ACircleTypeComputer.INSTANCE);
-        addFunction(CREATE_LINE, ALineTypeComputer.INSTANCE);
-        addPrivateFunction(CREATE_MBR, ADoubleTypeComputer.INSTANCE);
-        addFunction(CREATE_POINT, APointTypeComputer.INSTANCE);
-        addFunction(CREATE_POLYGON, APolygonTypeComputer.INSTANCE);
-        addFunction(CREATE_RECTANGLE, ARectangleTypeComputer.INSTANCE);
-        addFunction(CREATE_UUID, AUUIDTypeComputer.INSTANCE);
+        addFunction(CONTAINS, ABooleanTypeComputer.INSTANCE, true);
+        addFunction(COUNT, AInt64TypeComputer.INSTANCE, true);
+        addPrivateFunction(COUNTHASHED_GRAM_TOKENS, OrderedListOfAInt32TypeComputer.INSTANCE, true);
+        addPrivateFunction(COUNTHASHED_WORD_TOKENS, OrderedListOfAInt32TypeComputer.INSTANCE, true);
+        addFunction(CREATE_CIRCLE, ACircleTypeComputer.INSTANCE, true);
+        addFunction(CREATE_LINE, ALineTypeComputer.INSTANCE, true);
+        addPrivateFunction(CREATE_MBR, ADoubleTypeComputer.INSTANCE, true);
+        addFunction(CREATE_POINT, APointTypeComputer.INSTANCE, true);
+        addFunction(CREATE_POLYGON, APolygonTypeComputer.INSTANCE, true);
+        addFunction(CREATE_RECTANGLE, ARectangleTypeComputer.INSTANCE, true);
+        addFunction(CREATE_UUID, AUUIDTypeComputer.INSTANCE, false);
 
-        addFunction(DATE_CONSTRUCTOR, OptionalADateTypeComputer.INSTANCE);
-        addFunction(DATETIME_CONSTRUCTOR, OptionalADateTimeTypeComputer.INSTANCE);
-        addFunction(DOUBLE_CONSTRUCTOR, OptionalADoubleTypeComputer.INSTANCE);
-        addFunction(DURATION_CONSTRUCTOR, OptionalADurationTypeComputer.INSTANCE);
-        addFunction(YEAR_MONTH_DURATION_CONSTRUCTOR, OptionalAYearMonthDurationTypeComputer.INSTANCE);
-        addFunction(DAY_TIME_DURATION_CONSTRUCTOR, OptionalADayTimeDurationTypeComputer.INSTANCE);
-        addFunction(EDIT_DISTANCE, AInt32TypeComputer.INSTANCE);
-        addFunction(EDIT_DISTANCE_CHECK, OrderedListOfAnyTypeComputer.INSTANCE);
-        addPrivateFunction(EDIT_DISTANCE_STRING_IS_FILTERABLE, ABooleanTypeComputer.INSTANCE);
-        addPrivateFunction(EDIT_DISTANCE_LIST_IS_FILTERABLE, ABooleanTypeComputer.INSTANCE);
+        addFunction(DATE_CONSTRUCTOR, OptionalADateTypeComputer.INSTANCE, true);
+        addFunction(DATETIME_CONSTRUCTOR, OptionalADateTimeTypeComputer.INSTANCE, true);
+        addFunction(DOUBLE_CONSTRUCTOR, OptionalADoubleTypeComputer.INSTANCE, true);
+        addFunction(DURATION_CONSTRUCTOR, OptionalADurationTypeComputer.INSTANCE, true);
+        addFunction(YEAR_MONTH_DURATION_CONSTRUCTOR, OptionalAYearMonthDurationTypeComputer.INSTANCE, true);
+        addFunction(DAY_TIME_DURATION_CONSTRUCTOR, OptionalADayTimeDurationTypeComputer.INSTANCE, true);
+        addFunction(EDIT_DISTANCE, AInt32TypeComputer.INSTANCE, true);
+        addFunction(EDIT_DISTANCE_CHECK, OrderedListOfAnyTypeComputer.INSTANCE, true);
+        addPrivateFunction(EDIT_DISTANCE_STRING_IS_FILTERABLE, ABooleanTypeComputer.INSTANCE, true);
+        addPrivateFunction(EDIT_DISTANCE_LIST_IS_FILTERABLE, ABooleanTypeComputer.INSTANCE, true);
         addPrivateFunction(EMBED_TYPE, new IResultTypeComputer() {
             @Override
             public IAType computeType(ILogicalExpression expression, IVariableTypeEnvironment env,
                     IMetadataProvider<?, ?> mp) throws AlgebricksException {
                 return (IAType) BuiltinType.ANY;
             }
-        });
-        addPrivateFunction(EMPTY_STREAM, ABooleanTypeComputer.INSTANCE);
-        addFunction(ENDS_WITH, ABooleanTypeComputer.INSTANCE);
+        }, true);
+        addPrivateFunction(EMPTY_STREAM, ABooleanTypeComputer.INSTANCE, true);
+        addFunction(ENDS_WITH, ABooleanTypeComputer.INSTANCE, true);
         // add(FIELD_ACCESS, NonTaggedFieldAccessByNameResultType.INSTANCE);
-        addPrivateFunction(FIELD_ACCESS_BY_INDEX, FieldAccessByIndexResultType.INSTANCE);
-        addPrivateFunction(FIELD_ACCESS_BY_NAME, NonTaggedFieldAccessByNameResultType.INSTANCE);
-        addFunction(FLOAT_CONSTRUCTOR, OptionalAFloatTypeComputer.INSTANCE);
-        addPrivateFunction(FUZZY_EQ, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE);
-        addPrivateFunction(GET_HANDLE, null); // TODO
-        addPrivateFunction(GET_ITEM, NonTaggedGetItemResultType.INSTANCE);
-        addPrivateFunction(GET_DATA, null); // TODO
-        addPrivateFunction(GLOBAL_AVG, OptionalADoubleTypeComputer.INSTANCE);
-        addPrivateFunction(GRAM_TOKENS, OrderedListOfAStringTypeComputer.INSTANCE);
-        addFunction(GLOBAL_AVG, OptionalADoubleTypeComputer.INSTANCE);
-        addPrivateFunction(HASHED_GRAM_TOKENS, OrderedListOfAInt32TypeComputer.INSTANCE);
-        addPrivateFunction(HASHED_WORD_TOKENS, OrderedListOfAInt32TypeComputer.INSTANCE);
+        addPrivateFunction(FIELD_ACCESS_BY_INDEX, FieldAccessByIndexResultType.INSTANCE, true);
+        addPrivateFunction(FIELD_ACCESS_BY_NAME, NonTaggedFieldAccessByNameResultType.INSTANCE, true);
+        addFunction(FLOAT_CONSTRUCTOR, OptionalAFloatTypeComputer.INSTANCE, true);
+        addPrivateFunction(FUZZY_EQ, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE, true);
+        addPrivateFunction(GET_HANDLE, null, true); // TODO
+        addPrivateFunction(GET_ITEM, NonTaggedGetItemResultType.INSTANCE, true);
+        addPrivateFunction(GET_DATA, null, true); // TODO
+        addPrivateFunction(GLOBAL_AVG, OptionalADoubleTypeComputer.INSTANCE, true);
+        addPrivateFunction(GRAM_TOKENS, OrderedListOfAStringTypeComputer.INSTANCE, true);
+        addFunction(GLOBAL_AVG, OptionalADoubleTypeComputer.INSTANCE, true);
+        addPrivateFunction(HASHED_GRAM_TOKENS, OrderedListOfAInt32TypeComputer.INSTANCE, true);
+        addPrivateFunction(HASHED_WORD_TOKENS, OrderedListOfAInt32TypeComputer.INSTANCE, true);
         addPrivateFunction(INDEX_SEARCH, new IResultTypeComputer() {
 
             @Override
@@ -686,95 +682,95 @@
                     IMetadataProvider<?, ?> mp) throws AlgebricksException {
                 return BuiltinType.ANY; // TODO
             }
-        });
-        addFunction(INT8_CONSTRUCTOR, OptionalAInt8TypeComputer.INSTANCE);
-        addFunction(INT16_CONSTRUCTOR, OptionalAInt16TypeComputer.INSTANCE);
-        addFunction(INT32_CONSTRUCTOR, OptionalAInt32TypeComputer.INSTANCE);
-        addFunction(INT64_CONSTRUCTOR, OptionalAInt64TypeComputer.INSTANCE);
-        addFunction(LEN, OptionalAInt32TypeComputer.INSTANCE);
-        addFunction(LIKE, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE);
-        addFunction(LINE_CONSTRUCTOR, OptionalALineTypeComputer.INSTANCE);
-        addPrivateFunction(LISTIFY, OrderedListConstructorResultType.INSTANCE);
-        addPrivateFunction(LOCAL_AVG, NonTaggedLocalAvgTypeComputer.INSTANCE);
-        addPrivateFunction(MAKE_FIELD_INDEX_HANDLE, null); // TODO
-        addPrivateFunction(MAKE_FIELD_NAME_HANDLE, null); // TODO
-        addFunction(MAX, NonTaggedMinMaxAggTypeComputer.INSTANCE);
-        addPrivateFunction(LOCAL_MAX, NonTaggedMinMaxAggTypeComputer.INSTANCE);
-        addFunction(MIN, NonTaggedMinMaxAggTypeComputer.INSTANCE);
-        addPrivateFunction(LOCAL_MIN, NonTaggedMinMaxAggTypeComputer.INSTANCE);
-        addPrivateFunction(NON_EMPTY_STREAM, ABooleanTypeComputer.INSTANCE);
-        addFunction(NULL_CONSTRUCTOR, ANullTypeComputer.INSTANCE);
-        addPrivateFunction(NUMERIC_UNARY_MINUS, NonTaggedUnaryMinusTypeComputer.INSTANCE);
-        addPrivateFunction(NUMERIC_SUBTRACT, NonTaggedNumericAddSubMulDivTypeComputer.INSTANCE);
-        addPrivateFunction(NUMERIC_MULTIPLY, NonTaggedNumericAddSubMulDivTypeComputer.INSTANCE);
-        addPrivateFunction(NUMERIC_DIVIDE, NonTaggedNumericAddSubMulDivTypeComputer.INSTANCE);
-        addPrivateFunction(NUMERIC_MOD, NonTaggedNumericAddSubMulDivTypeComputer.INSTANCE);
-        addPrivateFunction(NUMERIC_IDIV, AInt32TypeComputer.INSTANCE);
+        }, true);
+        addFunction(INT8_CONSTRUCTOR, OptionalAInt8TypeComputer.INSTANCE, true);
+        addFunction(INT16_CONSTRUCTOR, OptionalAInt16TypeComputer.INSTANCE, true);
+        addFunction(INT32_CONSTRUCTOR, OptionalAInt32TypeComputer.INSTANCE, true);
+        addFunction(INT64_CONSTRUCTOR, OptionalAInt64TypeComputer.INSTANCE, true);
+        addFunction(LEN, OptionalAInt32TypeComputer.INSTANCE, true);
+        addFunction(LIKE, BinaryBooleanOrNullFunctionTypeComputer.INSTANCE, true);
+        addFunction(LINE_CONSTRUCTOR, OptionalALineTypeComputer.INSTANCE, true);
+        addPrivateFunction(LISTIFY, OrderedListConstructorResultType.INSTANCE, true);
+        addPrivateFunction(LOCAL_AVG, NonTaggedLocalAvgTypeComputer.INSTANCE, true);
+        addPrivateFunction(MAKE_FIELD_INDEX_HANDLE, null, true); // TODO
+        addPrivateFunction(MAKE_FIELD_NAME_HANDLE, null, true); // TODO
+        addFunction(MAX, NonTaggedMinMaxAggTypeComputer.INSTANCE, true);
+        addPrivateFunction(LOCAL_MAX, NonTaggedMinMaxAggTypeComputer.INSTANCE, true);
+        addFunction(MIN, NonTaggedMinMaxAggTypeComputer.INSTANCE, true);
+        addPrivateFunction(LOCAL_MIN, NonTaggedMinMaxAggTypeComputer.INSTANCE, true);
+        addPrivateFunction(NON_EMPTY_STREAM, ABooleanTypeComputer.INSTANCE, true);
+        addFunction(NULL_CONSTRUCTOR, ANullTypeComputer.INSTANCE, true);
+        addPrivateFunction(NUMERIC_UNARY_MINUS, NonTaggedUnaryMinusTypeComputer.INSTANCE, true);
+        addPrivateFunction(NUMERIC_SUBTRACT, NonTaggedNumericAddSubMulDivTypeComputer.INSTANCE, true);
+        addPrivateFunction(NUMERIC_MULTIPLY, NonTaggedNumericAddSubMulDivTypeComputer.INSTANCE, true);
+        addPrivateFunction(NUMERIC_DIVIDE, NonTaggedNumericAddSubMulDivTypeComputer.INSTANCE, true);
+        addPrivateFunction(NUMERIC_MOD, NonTaggedNumericAddSubMulDivTypeComputer.INSTANCE, true);
+        addPrivateFunction(NUMERIC_IDIV, AInt32TypeComputer.INSTANCE, true);
 
-        addFunction(NUMERIC_ABS, NonTaggedNumericUnaryFunctionTypeComputer.INSTANCE);
-        addFunction(NUMERIC_CEILING, NonTaggedNumericUnaryFunctionTypeComputer.INSTANCE);
-        addFunction(NUMERIC_FLOOR, NonTaggedNumericUnaryFunctionTypeComputer.INSTANCE);
-        addFunction(NUMERIC_ROUND, NonTaggedNumericUnaryFunctionTypeComputer.INSTANCE);
-        addFunction(NUMERIC_ROUND_HALF_TO_EVEN, NonTaggedNumericUnaryFunctionTypeComputer.INSTANCE);
-        addFunction(NUMERIC_ROUND_HALF_TO_EVEN2, NonTaggedNumericRoundHalfToEven2TypeComputer.INSTANCE);
+        addFunction(NUMERIC_ABS, NonTaggedNumericUnaryFunctionTypeComputer.INSTANCE, true);
+        addFunction(NUMERIC_CEILING, NonTaggedNumericUnaryFunctionTypeComputer.INSTANCE, true);
+        addFunction(NUMERIC_FLOOR, NonTaggedNumericUnaryFunctionTypeComputer.INSTANCE, true);
+        addFunction(NUMERIC_ROUND, NonTaggedNumericUnaryFunctionTypeComputer.INSTANCE, true);
+        addFunction(NUMERIC_ROUND_HALF_TO_EVEN, NonTaggedNumericUnaryFunctionTypeComputer.INSTANCE, true);
+        addFunction(NUMERIC_ROUND_HALF_TO_EVEN2, NonTaggedNumericRoundHalfToEven2TypeComputer.INSTANCE, true);
 
-        addFunction(STRING_TO_CODEPOINT, OrderedListOfAInt32TypeComputer.INSTANCE);
-        addFunction(CODEPOINT_TO_STRING, AStringTypeComputer.INSTANCE);
-        addFunction(STRING_CONCAT, OptionalAStringTypeComputer.INSTANCE);
-        addFunction(SUBSTRING2, Substring2TypeComputer.INSTANCE);
-        addFunction(STRING_LENGTH, UnaryStringInt32OrNullTypeComputer.INSTANCE);
-        addFunction(STRING_LOWERCASE, UnaryStringOrNullTypeComputer.INSTANCE);
-        addFunction(STRING_START_WITH, BinaryStringBoolOrNullTypeComputer.INSTANCE);
-        addFunction(STRING_END_WITH, BinaryStringBoolOrNullTypeComputer.INSTANCE);
-        addFunction(STRING_MATCHES, BinaryStringBoolOrNullTypeComputer.INSTANCE);
-        addFunction(STRING_MATCHES_WITH_FLAG, TripleStringBoolOrNullTypeComputer.INSTANCE);
-        addFunction(STRING_REPLACE, TripleStringStringOrNullTypeComputer.INSTANCE);
-        addFunction(STRING_REPLACE_WITH_FLAG, QuadStringStringOrNullTypeComputer.INSTANCE);
-        addFunction(SUBSTRING_BEFORE, BinaryStringStringOrNullTypeComputer.INSTANCE);
-        addFunction(SUBSTRING_AFTER, BinaryStringStringOrNullTypeComputer.INSTANCE);
-        addPrivateFunction(STRING_EQUAL, BinaryStringBoolOrNullTypeComputer.INSTANCE);
-        addFunction(STRING_JOIN, AStringTypeComputer.INSTANCE);
+        addFunction(STRING_TO_CODEPOINT, OrderedListOfAInt32TypeComputer.INSTANCE, true);
+        addFunction(CODEPOINT_TO_STRING, AStringTypeComputer.INSTANCE, true);
+        addFunction(STRING_CONCAT, OptionalAStringTypeComputer.INSTANCE, true);
+        addFunction(SUBSTRING2, Substring2TypeComputer.INSTANCE, true);
+        addFunction(STRING_LENGTH, UnaryStringInt32OrNullTypeComputer.INSTANCE, true);
+        addFunction(STRING_LOWERCASE, UnaryStringOrNullTypeComputer.INSTANCE, true);
+        addFunction(STRING_START_WITH, BinaryStringBoolOrNullTypeComputer.INSTANCE, true);
+        addFunction(STRING_END_WITH, BinaryStringBoolOrNullTypeComputer.INSTANCE, true);
+        addFunction(STRING_MATCHES, BinaryStringBoolOrNullTypeComputer.INSTANCE, true);
+        addFunction(STRING_MATCHES_WITH_FLAG, TripleStringBoolOrNullTypeComputer.INSTANCE, true);
+        addFunction(STRING_REPLACE, TripleStringStringOrNullTypeComputer.INSTANCE, true);
+        addFunction(STRING_REPLACE_WITH_FLAG, QuadStringStringOrNullTypeComputer.INSTANCE, true);
+        addFunction(SUBSTRING_BEFORE, BinaryStringStringOrNullTypeComputer.INSTANCE, true);
+        addFunction(SUBSTRING_AFTER, BinaryStringStringOrNullTypeComputer.INSTANCE, true);
+        addPrivateFunction(STRING_EQUAL, BinaryStringBoolOrNullTypeComputer.INSTANCE, true);
+        addFunction(STRING_JOIN, AStringTypeComputer.INSTANCE, true);
 
-        addPrivateFunction(OPEN_RECORD_CONSTRUCTOR, OpenRecordConstructorResultType.INSTANCE);
-        addPrivateFunction(ORDERED_LIST_CONSTRUCTOR, OrderedListConstructorResultType.INSTANCE);
-        addFunction(POINT_CONSTRUCTOR, OptionalAPointTypeComputer.INSTANCE);
-        addFunction(POINT3D_CONSTRUCTOR, OptionalAPoint3DTypeComputer.INSTANCE);
-        addFunction(POLYGON_CONSTRUCTOR, OptionalAPolygonTypeComputer.INSTANCE);
-        addPrivateFunction(PREFIX_LEN_JACCARD, AInt32TypeComputer.INSTANCE);
-        addFunction(RANGE, AInt32TypeComputer.INSTANCE);
-        addFunction(RECTANGLE_CONSTRUCTOR, OptionalARectangleTypeComputer.INSTANCE);
+        addPrivateFunction(OPEN_RECORD_CONSTRUCTOR, OpenRecordConstructorResultType.INSTANCE, true);
+        addPrivateFunction(ORDERED_LIST_CONSTRUCTOR, OrderedListConstructorResultType.INSTANCE, true);
+        addFunction(POINT_CONSTRUCTOR, OptionalAPointTypeComputer.INSTANCE, true);
+        addFunction(POINT3D_CONSTRUCTOR, OptionalAPoint3DTypeComputer.INSTANCE, true);
+        addFunction(POLYGON_CONSTRUCTOR, OptionalAPolygonTypeComputer.INSTANCE, true);
+        addPrivateFunction(PREFIX_LEN_JACCARD, AInt32TypeComputer.INSTANCE, true);
+        addFunction(RANGE, AInt32TypeComputer.INSTANCE, true);
+        addFunction(RECTANGLE_CONSTRUCTOR, OptionalARectangleTypeComputer.INSTANCE, true);
 
-        addFunction(SCALAR_AVG, ScalarVersionOfAggregateResultType.INSTANCE);
-        addFunction(SCALAR_COUNT, AInt64TypeComputer.INSTANCE);
-        addPrivateFunction(SCALAR_GLOBAL_AVG, ScalarVersionOfAggregateResultType.INSTANCE);
-        addPrivateFunction(SCALAR_LOCAL_AVG, ScalarVersionOfAggregateResultType.INSTANCE);
-        addFunction(SCALAR_MAX, ScalarVersionOfAggregateResultType.INSTANCE);
-        addFunction(SCALAR_MIN, ScalarVersionOfAggregateResultType.INSTANCE);
-        addFunction(SCALAR_SUM, ScalarVersionOfAggregateResultType.INSTANCE);
-        addPrivateFunction(SCAN_COLLECTION, NonTaggedCollectionMemberResultType.INSTANCE);
-        addPrivateFunction(SERIAL_AVG, OptionalADoubleTypeComputer.INSTANCE);
-        addPrivateFunction(SERIAL_COUNT, AInt64TypeComputer.INSTANCE);
-        addPrivateFunction(SERIAL_GLOBAL_AVG, OptionalADoubleTypeComputer.INSTANCE);
-        addPrivateFunction(SERIAL_LOCAL_AVG, NonTaggedLocalAvgTypeComputer.INSTANCE);
-        addPrivateFunction(SERIAL_SUM, NonTaggedNumericAggTypeComputer.INSTANCE);
-        addPrivateFunction(SERIAL_LOCAL_SUM, NonTaggedNumericAggTypeComputer.INSTANCE);
-        addFunction(SIMILARITY_JACCARD, AFloatTypeComputer.INSTANCE);
-        addFunction(SIMILARITY_JACCARD_CHECK, OrderedListOfAnyTypeComputer.INSTANCE);
-        addPrivateFunction(SIMILARITY_JACCARD_SORTED, AFloatTypeComputer.INSTANCE);
-        addPrivateFunction(SIMILARITY_JACCARD_SORTED_CHECK, OrderedListOfAnyTypeComputer.INSTANCE);
-        addPrivateFunction(SIMILARITY_JACCARD_PREFIX, AFloatTypeComputer.INSTANCE);
-        addPrivateFunction(SIMILARITY_JACCARD_PREFIX_CHECK, OrderedListOfAnyTypeComputer.INSTANCE);
-        addFunction(SPATIAL_AREA, ADoubleTypeComputer.INSTANCE);
-        addFunction(SPATIAL_CELL, ARectangleTypeComputer.INSTANCE);
-        addFunction(SPATIAL_DISTANCE, ADoubleTypeComputer.INSTANCE);
-        addFunction(SPATIAL_INTERSECT, ABooleanTypeComputer.INSTANCE);
-        addFunction(GET_POINT_X_COORDINATE_ACCESSOR, ADoubleTypeComputer.INSTANCE);
-        addFunction(GET_POINT_Y_COORDINATE_ACCESSOR, ADoubleTypeComputer.INSTANCE);
-        addFunction(GET_CIRCLE_RADIUS_ACCESSOR, ADoubleTypeComputer.INSTANCE);
-        addFunction(GET_CIRCLE_CENTER_ACCESSOR, APointTypeComputer.INSTANCE);
-        addFunction(GET_POINTS_LINE_RECTANGLE_POLYGON_ACCESSOR, OrderedListOfAPointTypeComputer.INSTANCE);
-        addFunction(STARTS_WITH, ABooleanTypeComputer.INSTANCE);
-        addFunction(STRING_CONSTRUCTOR, OptionalAStringTypeComputer.INSTANCE);
+        addFunction(SCALAR_AVG, ScalarVersionOfAggregateResultType.INSTANCE, true);
+        addFunction(SCALAR_COUNT, AInt64TypeComputer.INSTANCE, true);
+        addPrivateFunction(SCALAR_GLOBAL_AVG, ScalarVersionOfAggregateResultType.INSTANCE, true);
+        addPrivateFunction(SCALAR_LOCAL_AVG, ScalarVersionOfAggregateResultType.INSTANCE, true);
+        addFunction(SCALAR_MAX, ScalarVersionOfAggregateResultType.INSTANCE, true);
+        addFunction(SCALAR_MIN, ScalarVersionOfAggregateResultType.INSTANCE, true);
+        addFunction(SCALAR_SUM, ScalarVersionOfAggregateResultType.INSTANCE, true);
+        addPrivateFunction(SCAN_COLLECTION, NonTaggedCollectionMemberResultType.INSTANCE, true);
+        addPrivateFunction(SERIAL_AVG, OptionalADoubleTypeComputer.INSTANCE, true);
+        addPrivateFunction(SERIAL_COUNT, AInt64TypeComputer.INSTANCE, true);
+        addPrivateFunction(SERIAL_GLOBAL_AVG, OptionalADoubleTypeComputer.INSTANCE, true);
+        addPrivateFunction(SERIAL_LOCAL_AVG, NonTaggedLocalAvgTypeComputer.INSTANCE, true);
+        addPrivateFunction(SERIAL_SUM, NonTaggedNumericAggTypeComputer.INSTANCE, true);
+        addPrivateFunction(SERIAL_LOCAL_SUM, NonTaggedNumericAggTypeComputer.INSTANCE, true);
+        addFunction(SIMILARITY_JACCARD, AFloatTypeComputer.INSTANCE, true);
+        addFunction(SIMILARITY_JACCARD_CHECK, OrderedListOfAnyTypeComputer.INSTANCE, true);
+        addPrivateFunction(SIMILARITY_JACCARD_SORTED, AFloatTypeComputer.INSTANCE, true);
+        addPrivateFunction(SIMILARITY_JACCARD_SORTED_CHECK, OrderedListOfAnyTypeComputer.INSTANCE, true);
+        addPrivateFunction(SIMILARITY_JACCARD_PREFIX, AFloatTypeComputer.INSTANCE, true);
+        addPrivateFunction(SIMILARITY_JACCARD_PREFIX_CHECK, OrderedListOfAnyTypeComputer.INSTANCE, true);
+        addFunction(SPATIAL_AREA, ADoubleTypeComputer.INSTANCE, true);
+        addFunction(SPATIAL_CELL, ARectangleTypeComputer.INSTANCE, true);
+        addFunction(SPATIAL_DISTANCE, ADoubleTypeComputer.INSTANCE, true);
+        addFunction(SPATIAL_INTERSECT, ABooleanTypeComputer.INSTANCE, true);
+        addFunction(GET_POINT_X_COORDINATE_ACCESSOR, ADoubleTypeComputer.INSTANCE, true);
+        addFunction(GET_POINT_Y_COORDINATE_ACCESSOR, ADoubleTypeComputer.INSTANCE, true);
+        addFunction(GET_CIRCLE_RADIUS_ACCESSOR, ADoubleTypeComputer.INSTANCE, true);
+        addFunction(GET_CIRCLE_CENTER_ACCESSOR, APointTypeComputer.INSTANCE, true);
+        addFunction(GET_POINTS_LINE_RECTANGLE_POLYGON_ACCESSOR, OrderedListOfAPointTypeComputer.INSTANCE, true);
+        addFunction(STARTS_WITH, ABooleanTypeComputer.INSTANCE, true);
+        addFunction(STRING_CONSTRUCTOR, OptionalAStringTypeComputer.INSTANCE, true);
         addPrivateFunction(SUBSET_COLLECTION, new IResultTypeComputer() {
 
             @Override
@@ -811,95 +807,95 @@
                     }
                 }
             }
-        });
-        addFunction(SUBSTRING, SubstringTypeComputer.INSTANCE);
-        addFunction(SUM, NonTaggedNumericAggTypeComputer.INSTANCE);
-        addPrivateFunction(LOCAL_SUM, NonTaggedNumericAggTypeComputer.INSTANCE);
-        addFunction(SWITCH_CASE, NonTaggedSwitchCaseComputer.INSTANCE);
-        addPrivateFunction(REG_EXP, ABooleanTypeComputer.INSTANCE);
-        addFunction(INJECT_FAILURE, InjectFailureTypeComputer.INSTANCE);
-        addPrivateFunction(CAST_RECORD, CastRecordResultTypeComputer.INSTANCE);
-        addFunction(CAST_LIST, CastListResultTypeComputer.INSTANCE);
+        }, true);
+        addFunction(SUBSTRING, SubstringTypeComputer.INSTANCE, true);
+        addFunction(SUM, NonTaggedNumericAggTypeComputer.INSTANCE, true);
+        addPrivateFunction(LOCAL_SUM, NonTaggedNumericAggTypeComputer.INSTANCE, true);
+        addFunction(SWITCH_CASE, NonTaggedSwitchCaseComputer.INSTANCE, true);
+        addPrivateFunction(REG_EXP, ABooleanTypeComputer.INSTANCE, true);
+        addFunction(INJECT_FAILURE, InjectFailureTypeComputer.INSTANCE, true);
+        addPrivateFunction(CAST_RECORD, CastRecordResultTypeComputer.INSTANCE, true);
+        addFunction(CAST_LIST, CastListResultTypeComputer.INSTANCE, true);
 
-        addFunction(TID, AInt32TypeComputer.INSTANCE);
-        addFunction(TIME_CONSTRUCTOR, OptionalATimeTypeComputer.INSTANCE);
-        addPrivateFunction(TYPE_OF, null);
-        addPrivateFunction(UNORDERED_LIST_CONSTRUCTOR, UnorderedListConstructorResultType.INSTANCE);
+        addFunction(TID, AInt32TypeComputer.INSTANCE, true);
+        addFunction(TIME_CONSTRUCTOR, OptionalATimeTypeComputer.INSTANCE, true);
+        addPrivateFunction(TYPE_OF, null, true);
+        addPrivateFunction(UNORDERED_LIST_CONSTRUCTOR, UnorderedListConstructorResultType.INSTANCE, true);
         addFunction(WORD_TOKENS, new IResultTypeComputer() {
             @Override
             public IAType computeType(ILogicalExpression expression, IVariableTypeEnvironment env,
                     IMetadataProvider<?, ?> mp) throws AlgebricksException {
                 return new AOrderedListType(BuiltinType.ASTRING, "string");
             }
-        });
+        }, true);
 
         // temporal type accessors
-        addFunction(ACCESSOR_TEMPORAL_YEAR, OptionalAInt32TypeComputer.INSTANCE);
-        addFunction(ACCESSOR_TEMPORAL_MONTH, OptionalAInt32TypeComputer.INSTANCE);
-        addFunction(ACCESSOR_TEMPORAL_DAY, OptionalAInt32TypeComputer.INSTANCE);
-        addFunction(ACCESSOR_TEMPORAL_HOUR, OptionalAInt32TypeComputer.INSTANCE);
-        addFunction(ACCESSOR_TEMPORAL_MIN, OptionalAInt32TypeComputer.INSTANCE);
-        addFunction(ACCESSOR_TEMPORAL_SEC, OptionalAInt32TypeComputer.INSTANCE);
-        addFunction(ACCESSOR_TEMPORAL_MILLISEC, OptionalAInt32TypeComputer.INSTANCE);
-        addFunction(ACCESSOR_TEMPORAL_INTERVAL_START, OptionalATemporalInstanceTypeComputer.INSTANCE);
-        addFunction(ACCESSOR_TEMPORAL_INTERVAL_END, OptionalATemporalInstanceTypeComputer.INSTANCE);
+        addFunction(ACCESSOR_TEMPORAL_YEAR, OptionalAInt32TypeComputer.INSTANCE, true);
+        addFunction(ACCESSOR_TEMPORAL_MONTH, OptionalAInt32TypeComputer.INSTANCE, true);
+        addFunction(ACCESSOR_TEMPORAL_DAY, OptionalAInt32TypeComputer.INSTANCE, true);
+        addFunction(ACCESSOR_TEMPORAL_HOUR, OptionalAInt32TypeComputer.INSTANCE, true);
+        addFunction(ACCESSOR_TEMPORAL_MIN, OptionalAInt32TypeComputer.INSTANCE, true);
+        addFunction(ACCESSOR_TEMPORAL_SEC, OptionalAInt32TypeComputer.INSTANCE, true);
+        addFunction(ACCESSOR_TEMPORAL_MILLISEC, OptionalAInt32TypeComputer.INSTANCE, true);
+        addFunction(ACCESSOR_TEMPORAL_INTERVAL_START, OptionalATemporalInstanceTypeComputer.INSTANCE, true);
+        addFunction(ACCESSOR_TEMPORAL_INTERVAL_END, OptionalATemporalInstanceTypeComputer.INSTANCE, true);
 
         // temporal functions
-        addFunction(DATE_FROM_UNIX_TIME_IN_DAYS, OptionalADateTypeComputer.INSTANCE);
-        addFunction(DATE_FROM_DATETIME, OptionalADateTypeComputer.INSTANCE);
-        addFunction(TIME_FROM_UNIX_TIME_IN_MS, OptionalATimeTypeComputer.INSTANCE);
-        addFunction(TIME_FROM_DATETIME, OptionalATimeTypeComputer.INSTANCE);
-        addFunction(DATETIME_FROM_DATE_TIME, OptionalADateTimeTypeComputer.INSTANCE);
-        addFunction(DATETIME_FROM_UNIX_TIME_IN_MS, OptionalADateTimeTypeComputer.INSTANCE);
-        addFunction(CALENDAR_DURATION_FROM_DATETIME, OptionalADurationTypeComputer.INSTANCE);
-        addFunction(CALENDAR_DURATION_FROM_DATE, OptionalADurationTypeComputer.INSTANCE);
-        addFunction(ADJUST_DATETIME_FOR_TIMEZONE, OptionalAStringTypeComputer.INSTANCE);
-        addFunction(ADJUST_TIME_FOR_TIMEZONE, OptionalAStringTypeComputer.INSTANCE);
-        addFunction(INTERVAL_BEFORE, OptionalABooleanTypeComputer.INSTANCE);
-        addFunction(INTERVAL_AFTER, OptionalABooleanTypeComputer.INSTANCE);
-        addFunction(INTERVAL_MEETS, OptionalABooleanTypeComputer.INSTANCE);
-        addFunction(INTERVAL_MET_BY, OptionalABooleanTypeComputer.INSTANCE);
-        addFunction(INTERVAL_OVERLAPS, OptionalABooleanTypeComputer.INSTANCE);
-        addFunction(INTERVAL_OVERLAPPED_BY, OptionalABooleanTypeComputer.INSTANCE);
-        addFunction(OVERLAP, OptionalABooleanTypeComputer.INSTANCE);
-        addFunction(INTERVAL_STARTS, OptionalABooleanTypeComputer.INSTANCE);
-        addFunction(INTERVAL_STARTED_BY, OptionalABooleanTypeComputer.INSTANCE);
-        addFunction(INTERVAL_COVERS, OptionalABooleanTypeComputer.INSTANCE);
-        addFunction(INTERVAL_COVERED_BY, OptionalABooleanTypeComputer.INSTANCE);
-        addFunction(INTERVAL_ENDS, OptionalABooleanTypeComputer.INSTANCE);
-        addFunction(INTERVAL_ENDED_BY, OptionalABooleanTypeComputer.INSTANCE);
-        addFunction(CURRENT_DATE, ADateTypeComputer.INSTANCE);
-        addFunction(CURRENT_TIME, ATimeTypeComputer.INSTANCE);
-        addFunction(CURRENT_DATETIME, ADateTimeTypeComputer.INSTANCE);
-        addFunction(DAY_TIME_DURATION_GREATER_THAN, OptionalABooleanTypeComputer.INSTANCE);
-        addPrivateFunction(DAY_TIME_DURATION_LESS_THAN, OptionalABooleanTypeComputer.INSTANCE);
-        addPrivateFunction(YEAR_MONTH_DURATION_GREATER_THAN, OptionalABooleanTypeComputer.INSTANCE);
-        addPrivateFunction(YEAR_MONTH_DURATION_LESS_THAN, OptionalABooleanTypeComputer.INSTANCE);
-        addPrivateFunction(DURATION_EQUAL, OptionalABooleanTypeComputer.INSTANCE);
-        addFunction(DURATION_FROM_MONTHS, OptionalADurationTypeComputer.INSTANCE);
-        addFunction(DURATION_FROM_MILLISECONDS, OptionalADurationTypeComputer.INSTANCE);
-        addFunction(MONTHS_FROM_YEAR_MONTH_DURATION, OptionalAInt32TypeComputer.INSTANCE);
-        addFunction(MILLISECONDS_FROM_DAY_TIME_DURATION, OptionalAInt64TypeComputer.INSTANCE);
-        addFunction(GET_DAY_TIME_DURATION, OptionalADayTimeDurationTypeComputer.INSTANCE);
-        addFunction(GET_YEAR_MONTH_DURATION, OptionalAYearMonthDurationTypeComputer.INSTANCE);
-        addFunction(INTERVAL_BIN, OptionalAIntervalTypeComputer.INSTANCE);
-        addFunction(DAY_OF_WEEK, OptionalAInt32TypeComputer.INSTANCE);
-        addFunction(PARSE_DATE, OptionalADateTypeComputer.INSTANCE);
-        addFunction(PARSE_TIME, OptionalATimeTypeComputer.INSTANCE);
-        addFunction(PARSE_DATETIME, OptionalADateTimeTypeComputer.INSTANCE);
-        addFunction(PRINT_DATE, OptionalAStringTypeComputer.INSTANCE);
-        addFunction(PRINT_TIME, OptionalAStringTypeComputer.INSTANCE);
-        addFunction(PRINT_DATETIME, OptionalAStringTypeComputer.INSTANCE);
+        addFunction(DATE_FROM_UNIX_TIME_IN_DAYS, OptionalADateTypeComputer.INSTANCE, true);
+        addFunction(DATE_FROM_DATETIME, OptionalADateTypeComputer.INSTANCE, true);
+        addFunction(TIME_FROM_UNIX_TIME_IN_MS, OptionalATimeTypeComputer.INSTANCE, true);
+        addFunction(TIME_FROM_DATETIME, OptionalATimeTypeComputer.INSTANCE, true);
+        addFunction(DATETIME_FROM_DATE_TIME, OptionalADateTimeTypeComputer.INSTANCE, true);
+        addFunction(DATETIME_FROM_UNIX_TIME_IN_MS, OptionalADateTimeTypeComputer.INSTANCE, true);
+        addFunction(CALENDAR_DURATION_FROM_DATETIME, OptionalADurationTypeComputer.INSTANCE, true);
+        addFunction(CALENDAR_DURATION_FROM_DATE, OptionalADurationTypeComputer.INSTANCE, true);
+        addFunction(ADJUST_DATETIME_FOR_TIMEZONE, OptionalAStringTypeComputer.INSTANCE, true);
+        addFunction(ADJUST_TIME_FOR_TIMEZONE, OptionalAStringTypeComputer.INSTANCE, true);
+        addFunction(INTERVAL_BEFORE, OptionalABooleanTypeComputer.INSTANCE, true);
+        addFunction(INTERVAL_AFTER, OptionalABooleanTypeComputer.INSTANCE, true);
+        addFunction(INTERVAL_MEETS, OptionalABooleanTypeComputer.INSTANCE, true);
+        addFunction(INTERVAL_MET_BY, OptionalABooleanTypeComputer.INSTANCE, true);
+        addFunction(INTERVAL_OVERLAPS, OptionalABooleanTypeComputer.INSTANCE, true);
+        addFunction(INTERVAL_OVERLAPPED_BY, OptionalABooleanTypeComputer.INSTANCE, true);
+        addFunction(OVERLAP, OptionalABooleanTypeComputer.INSTANCE, true);
+        addFunction(INTERVAL_STARTS, OptionalABooleanTypeComputer.INSTANCE, true);
+        addFunction(INTERVAL_STARTED_BY, OptionalABooleanTypeComputer.INSTANCE, true);
+        addFunction(INTERVAL_COVERS, OptionalABooleanTypeComputer.INSTANCE, true);
+        addFunction(INTERVAL_COVERED_BY, OptionalABooleanTypeComputer.INSTANCE, true);
+        addFunction(INTERVAL_ENDS, OptionalABooleanTypeComputer.INSTANCE, true);
+        addFunction(INTERVAL_ENDED_BY, OptionalABooleanTypeComputer.INSTANCE, true);
+        addFunction(CURRENT_DATE, ADateTypeComputer.INSTANCE, true);
+        addFunction(CURRENT_TIME, ATimeTypeComputer.INSTANCE, true);
+        addFunction(CURRENT_DATETIME, ADateTimeTypeComputer.INSTANCE, true);
+        addFunction(DAY_TIME_DURATION_GREATER_THAN, OptionalABooleanTypeComputer.INSTANCE, true);
+        addPrivateFunction(DAY_TIME_DURATION_LESS_THAN, OptionalABooleanTypeComputer.INSTANCE, true);
+        addPrivateFunction(YEAR_MONTH_DURATION_GREATER_THAN, OptionalABooleanTypeComputer.INSTANCE, true);
+        addPrivateFunction(YEAR_MONTH_DURATION_LESS_THAN, OptionalABooleanTypeComputer.INSTANCE, true);
+        addPrivateFunction(DURATION_EQUAL, OptionalABooleanTypeComputer.INSTANCE, true);
+        addFunction(DURATION_FROM_MONTHS, OptionalADurationTypeComputer.INSTANCE, true);
+        addFunction(DURATION_FROM_MILLISECONDS, OptionalADurationTypeComputer.INSTANCE, true);
+        addFunction(MONTHS_FROM_YEAR_MONTH_DURATION, OptionalAInt32TypeComputer.INSTANCE, true);
+        addFunction(MILLISECONDS_FROM_DAY_TIME_DURATION, OptionalAInt64TypeComputer.INSTANCE, true);
+        addFunction(GET_DAY_TIME_DURATION, OptionalADayTimeDurationTypeComputer.INSTANCE, true);
+        addFunction(GET_YEAR_MONTH_DURATION, OptionalAYearMonthDurationTypeComputer.INSTANCE, true);
+        addFunction(INTERVAL_BIN, OptionalAIntervalTypeComputer.INSTANCE, true);
+        addFunction(DAY_OF_WEEK, OptionalAInt32TypeComputer.INSTANCE, true);
+        addFunction(PARSE_DATE, OptionalADateTypeComputer.INSTANCE, true);
+        addFunction(PARSE_TIME, OptionalATimeTypeComputer.INSTANCE, true);
+        addFunction(PARSE_DATETIME, OptionalADateTimeTypeComputer.INSTANCE, true);
+        addFunction(PRINT_DATE, OptionalAStringTypeComputer.INSTANCE, true);
+        addFunction(PRINT_TIME, OptionalAStringTypeComputer.INSTANCE, true);
+        addFunction(PRINT_DATETIME, OptionalAStringTypeComputer.INSTANCE, true);
 
         // interval constructors
-        addFunction(INTERVAL_CONSTRUCTOR_DATE, OptionalAIntervalTypeComputer.INSTANCE);
-        addFunction(INTERVAL_CONSTRUCTOR_TIME, OptionalAIntervalTypeComputer.INSTANCE);
-        addFunction(INTERVAL_CONSTRUCTOR_DATETIME, OptionalAIntervalTypeComputer.INSTANCE);
-        addFunction(INTERVAL_CONSTRUCTOR_START_FROM_DATE, OptionalAIntervalTypeComputer.INSTANCE);
-        addFunction(INTERVAL_CONSTRUCTOR_START_FROM_DATETIME, OptionalAIntervalTypeComputer.INSTANCE);
-        addFunction(INTERVAL_CONSTRUCTOR_START_FROM_TIME, OptionalAIntervalTypeComputer.INSTANCE);
+        addFunction(INTERVAL_CONSTRUCTOR_DATE, OptionalAIntervalTypeComputer.INSTANCE, true);
+        addFunction(INTERVAL_CONSTRUCTOR_TIME, OptionalAIntervalTypeComputer.INSTANCE, true);
+        addFunction(INTERVAL_CONSTRUCTOR_DATETIME, OptionalAIntervalTypeComputer.INSTANCE, true);
+        addFunction(INTERVAL_CONSTRUCTOR_START_FROM_DATE, OptionalAIntervalTypeComputer.INSTANCE, true);
+        addFunction(INTERVAL_CONSTRUCTOR_START_FROM_DATETIME, OptionalAIntervalTypeComputer.INSTANCE, true);
+        addFunction(INTERVAL_CONSTRUCTOR_START_FROM_TIME, OptionalAIntervalTypeComputer.INSTANCE, true);
 
-        addPrivateFunction(COLLECTION_TO_SEQUENCE, CollectionToSequenceTypeComputer.INSTANCE);
+        addPrivateFunction(COLLECTION_TO_SEQUENCE, CollectionToSequenceTypeComputer.INSTANCE, true);
 
         String metadataFunctionLoaderClassName = "edu.uci.ics.asterix.metadata.functions.MetadataBuiltinFunctions";
         try {
@@ -1101,18 +1097,18 @@
         return finfo == null ? null : finfo.getFunctionIdentifier();
     }
 
-    public static void addFunction(FunctionIdentifier fi, IResultTypeComputer typeComputer) {
-        IFunctionInfo functionInfo = getAsterixFunctionInfo(fi);
+    public static void addFunction(FunctionIdentifier fi, IResultTypeComputer typeComputer, boolean isFunctional) {
+        IFunctionInfo functionInfo = new AsterixFunctionInfo(fi, isFunctional);
         builtinPublicFunctionsSet.put(functionInfo, functionInfo);
         funTypeComputer.put(functionInfo, typeComputer);
-        registeredFunctions.put(fi);
+        registeredFunctions.put(fi, functionInfo);
     }
 
-    public static void addPrivateFunction(FunctionIdentifier fi, IResultTypeComputer typeComputer) {
-        IFunctionInfo functionInfo = getAsterixFunctionInfo(fi);
+    public static void addPrivateFunction(FunctionIdentifier fi, IResultTypeComputer typeComputer, boolean isFunctional) {
+        IFunctionInfo functionInfo = new AsterixFunctionInfo(fi, isFunctional);
         builtinPrivateFunctionsSet.put(functionInfo, functionInfo);
         funTypeComputer.put(functionInfo, typeComputer);
-        registeredFunctions.put(fi);
+        registeredFunctions.put(fi, functionInfo);
     }
 
     private static void addAgg(FunctionIdentifier fi) {
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/om/functions/AsterixExternalFunctionInfo.java b/asterix-om/src/main/java/edu/uci/ics/asterix/om/functions/AsterixExternalFunctionInfo.java
index 0f08787..1358968 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/om/functions/AsterixExternalFunctionInfo.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/om/functions/AsterixExternalFunctionInfo.java
@@ -22,6 +22,8 @@
 
 public class AsterixExternalFunctionInfo extends AsterixFunctionInfo implements IExternalFunctionInfo {
 
+    private static final long serialVersionUID = 1L;
+
     private final IResultTypeComputer rtc;
     private final List<IAType> argumentTypes;
     private final String body;
@@ -29,20 +31,19 @@
     private final FunctionKind kind;
     private final IAType returnType;
 
-    public AsterixExternalFunctionInfo(){
-        super();
+    public AsterixExternalFunctionInfo() {
         rtc = null;
-        argumentTypes= null;
+        argumentTypes = null;
         body = null;
-        language=null;
+        language = null;
         kind = null;
         returnType = null;
-                
+
     }
-    
+
     public AsterixExternalFunctionInfo(String namespace, AsterixFunction asterixFunction, FunctionKind kind,
             List<IAType> argumentTypes, IAType returnType, IResultTypeComputer rtc, String body, String language) {
-        super(namespace, asterixFunction);
+        super(namespace, asterixFunction, true);
         this.rtc = rtc;
         this.argumentTypes = argumentTypes;
         this.body = body;
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/om/functions/AsterixFunctionInfo.java b/asterix-om/src/main/java/edu/uci/ics/asterix/om/functions/AsterixFunctionInfo.java
index c536a88..b926a60 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/om/functions/AsterixFunctionInfo.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/om/functions/AsterixFunctionInfo.java
@@ -14,30 +14,34 @@
  */
 package edu.uci.ics.asterix.om.functions;
 
-import java.io.Serializable;
-
 import edu.uci.ics.asterix.common.functions.FunctionSignature;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.AbstractFunctionInfo;
 import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
-import edu.uci.ics.hyracks.algebricks.core.algebra.functions.IFunctionInfo;
 
-public class AsterixFunctionInfo implements IFunctionInfo, Serializable {
+public class AsterixFunctionInfo extends AbstractFunctionInfo {
+
+    private static final long serialVersionUID = 1L;
 
     private final FunctionIdentifier functionIdentifier;
 
-    public AsterixFunctionInfo(String namespace, AsterixFunction asterixFunction) {
+    public AsterixFunctionInfo(String namespace, AsterixFunction asterixFunction, boolean isFunctional) {
+        super(isFunctional);
         this.functionIdentifier = new FunctionIdentifier(namespace, asterixFunction.getName(),
                 asterixFunction.getArity());
     }
 
     public AsterixFunctionInfo() {
+        super(true);
         functionIdentifier = null;
     }
 
-    public AsterixFunctionInfo(FunctionIdentifier functionIdentifier) {
+    public AsterixFunctionInfo(FunctionIdentifier functionIdentifier, boolean isFunctional) {
+        super(isFunctional);
         this.functionIdentifier = functionIdentifier;
     }
 
-    public AsterixFunctionInfo(FunctionSignature functionSignature) {
+    public AsterixFunctionInfo(FunctionSignature functionSignature, boolean isFunctional) {
+        super(isFunctional);
         this.functionIdentifier = new FunctionIdentifier(functionSignature.getNamespace(), functionSignature.getName(),
                 functionSignature.getArity());
     }
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/om/functions/FunctionInfoRepository.java b/asterix-om/src/main/java/edu/uci/ics/asterix/om/functions/FunctionInfoRepository.java
index 1eb4174..6290460 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/om/functions/FunctionInfoRepository.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/om/functions/FunctionInfoRepository.java
@@ -37,14 +37,8 @@
         return get(fid.getNamespace(), fid.getName(), fid.getArity());
     }
 
-    public void put(String namespace, String name, int arity) {
-        FunctionSignature functionSignature = new FunctionSignature(namespace, name, arity);
-        functionMap.put(functionSignature, new AsterixFunctionInfo(new FunctionIdentifier(namespace, name, arity)));
-    }
-
-    public void put(FunctionIdentifier fid) {
+    public void put(FunctionIdentifier fid, IFunctionInfo fInfo) {
         FunctionSignature functionSignature = new FunctionSignature(fid.getNamespace(), fid.getName(), fid.getArity());
-        functionMap.put(functionSignature, new AsterixFunctionInfo(fid));
+        functionMap.put(functionSignature, fInfo);
     }
 }
-