diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/ADateConstructorDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/ADateConstructorDescriptor.java
index ba48742..19c9d94 100644
--- a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/ADateConstructorDescriptor.java
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/ADateConstructorDescriptor.java
@@ -46,8 +46,6 @@
     private final static byte SER_STRING_TYPE_TAG = ATypeTag.STRING.serialize();
     private final static byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize();
 
-    private final static ByteArrayCharSequenceAccessor charAccessor = new ByteArrayCharSequenceAccessor();
-
     public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
         public IFunctionDescriptor createFunctionDescriptor() {
             return new ADateConstructorDescriptor();
@@ -76,6 +74,8 @@
                     private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
                             .getSerializerDeserializer(BuiltinType.ANULL);
 
+                    private ByteArrayCharSequenceAccessor charAccessor = new ByteArrayCharSequenceAccessor();
+
                     @Override
                     public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
 
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/ADateTimeConstructorDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/ADateTimeConstructorDescriptor.java
index 49a4734..22ed238 100644
--- a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/ADateTimeConstructorDescriptor.java
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/ADateTimeConstructorDescriptor.java
@@ -45,8 +45,6 @@
     private final static byte SER_STRING_TYPE_TAG = ATypeTag.STRING.serialize();
     private final static byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize();
 
-    private final static ByteArrayCharSequenceAccessor charAccessor = new ByteArrayCharSequenceAccessor();
-
     public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
         public IFunctionDescriptor createFunctionDescriptor() {
             return new ADateTimeConstructorDescriptor();
@@ -75,6 +73,8 @@
                     private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
                             .getSerializerDeserializer(BuiltinType.ANULL);
 
+                    private ByteArrayCharSequenceAccessor charAccessor = new ByteArrayCharSequenceAccessor();
+
                     @Override
                     public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
 
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/ATimeConstructorDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/ATimeConstructorDescriptor.java
index 48c06b0..19598b3 100644
--- a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/ATimeConstructorDescriptor.java
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/ATimeConstructorDescriptor.java
@@ -44,7 +44,6 @@
     public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "time", 1);
     private final static byte SER_STRING_TYPE_TAG = ATypeTag.STRING.serialize();
     private final static byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize();
-    private final static ByteArrayCharSequenceAccessor charAccessor = new ByteArrayCharSequenceAccessor();
 
     public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
         public IFunctionDescriptor createFunctionDescriptor() {
@@ -74,6 +73,8 @@
                     private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
                             .getSerializerDeserializer(BuiltinType.ANULL);
 
+                    private ByteArrayCharSequenceAccessor charAccessor = new ByteArrayCharSequenceAccessor();
+
                     @Override
                     public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {