diff --git a/asterix-algebra/pom.xml b/asterix-algebra/pom.xml
index a6f0ac4..70f8c53 100644
--- a/asterix-algebra/pom.xml
+++ b/asterix-algebra/pom.xml
@@ -6,6 +6,7 @@
 		<version>0.0.4-SNAPSHOT</version>
 	</parent>
 	<artifactId>asterix-algebra</artifactId>
+
 	<build>
 		<plugins>
 			<plugin>
diff --git a/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/rules/SetClosedRecordConstructorsRule.java b/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/rules/SetClosedRecordConstructorsRule.java
index ad70d6f..3dad464 100644
--- a/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/rules/SetClosedRecordConstructorsRule.java
+++ b/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/rules/SetClosedRecordConstructorsRule.java
@@ -186,6 +186,7 @@
                 case DATE:
                 case TIME:
                 case DURATION:
+                case INTERVAL:
                 case POINT:
                 case POINT3D:
                 case POLYGON:
diff --git a/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/rules/SimilarityCheckRule.java b/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/rules/SimilarityCheckRule.java
index c90b3f1..e88e5b0 100644
--- a/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/rules/SimilarityCheckRule.java
+++ b/asterix-algebra/src/main/java/edu/uci/ics/asterix/optimizer/rules/SimilarityCheckRule.java
@@ -33,24 +33,22 @@
 
 /**
  * Looks for a select operator, containing a condition:
- * 
  * similarity-function GE/GT/LE/LE constant/variable
- * 
  * Rewrites the select condition (and possibly the assign expr) with the equivalent similarity-check function.
- * 
  */
 public class SimilarityCheckRule implements IAlgebraicRewriteRule {
 
     @Override
-    public boolean rewritePost(Mutable<ILogicalOperator> opRef, IOptimizationContext context) throws AlgebricksException {
-    	AbstractLogicalOperator op = (AbstractLogicalOperator) opRef.getValue();
+    public boolean rewritePost(Mutable<ILogicalOperator> opRef, IOptimizationContext context)
+            throws AlgebricksException {
+        AbstractLogicalOperator op = (AbstractLogicalOperator) opRef.getValue();
         // Look for select.
         if (op.getOperatorTag() != LogicalOperatorTag.SELECT) {
             return false;
         }
         SelectOperator select = (SelectOperator) op;
         Mutable<ILogicalExpression> condExpr = select.getCondition();
-        
+
         // Gather assigns below this select.
         List<AssignOperator> assigns = new ArrayList<AssignOperator>();
         AbstractLogicalOperator childOp = (AbstractLogicalOperator) select.getInputs().get(0).getValue();
@@ -60,12 +58,13 @@
         }
         while (childOp.getOperatorTag() == LogicalOperatorTag.ASSIGN) {
             assigns.add((AssignOperator) childOp);
-        	childOp = (AbstractLogicalOperator) childOp.getInputs().get(0).getValue();
+            childOp = (AbstractLogicalOperator) childOp.getInputs().get(0).getValue();
         }
         return replaceSelectConditionExprs(condExpr, assigns, context);
     }
 
-    private boolean replaceSelectConditionExprs(Mutable<ILogicalExpression> expRef, List<AssignOperator> assigns, IOptimizationContext context) throws AlgebricksException {
+    private boolean replaceSelectConditionExprs(Mutable<ILogicalExpression> expRef, List<AssignOperator> assigns,
+            IOptimizationContext context) throws AlgebricksException {
         ILogicalExpression expr = expRef.getValue();
         if (expr.getExpressionTag() != LogicalExpressionTag.FUNCTION_CALL) {
             return false;
@@ -83,10 +82,10 @@
             }
             return found;
         }
-        
+
         // Look for GE/GT/LE/LT.
-        if (funcIdent != AlgebricksBuiltinFunctions.GE && funcIdent != AlgebricksBuiltinFunctions.GT &&
-                funcIdent != AlgebricksBuiltinFunctions.LE && funcIdent != AlgebricksBuiltinFunctions.LT) {
+        if (funcIdent != AlgebricksBuiltinFunctions.GE && funcIdent != AlgebricksBuiltinFunctions.GT
+                && funcIdent != AlgebricksBuiltinFunctions.LE && funcIdent != AlgebricksBuiltinFunctions.LT) {
             return false;
         }
 
@@ -98,8 +97,8 @@
         // Normalized GE/GT/LE/LT as if constant was on the right hand side.
         FunctionIdentifier normFuncIdent = null;
         // One of the args must be a constant.
-        if (arg1.getExpressionTag() == LogicalExpressionTag.CONSTANT) {                    	
-        	ConstantExpression constExpr = (ConstantExpression) arg1;
+        if (arg1.getExpressionTag() == LogicalExpressionTag.CONSTANT) {
+            ConstantExpression constExpr = (ConstantExpression) arg1;
             constVal = (AsterixConstantValue) constExpr.getValue();
             nonConstExpr = arg2;
             // Get func ident as if swapping lhs and rhs.            
@@ -113,91 +112,101 @@
         } else {
             return false;
         }
-        
+
         // The other arg is a function call. We can directly replace the select condition with an equivalent similarity check expression.
         if (nonConstExpr.getExpressionTag() == LogicalExpressionTag.FUNCTION_CALL) {
-        	return replaceWithFunctionCallArg(expRef, normFuncIdent, constVal, (AbstractFunctionCallExpression) nonConstExpr);
+            return replaceWithFunctionCallArg(expRef, normFuncIdent, constVal,
+                    (AbstractFunctionCallExpression) nonConstExpr);
         }
         // The other arg ist a variable. We may have to introduce an assign operator that assigns the result of a similarity-check function to a variable.
         if (nonConstExpr.getExpressionTag() == LogicalExpressionTag.VARIABLE) {
-        	return replaceWithVariableArg(expRef, normFuncIdent, constVal, (VariableReferenceExpression) nonConstExpr, assigns, context);
+            return replaceWithVariableArg(expRef, normFuncIdent, constVal, (VariableReferenceExpression) nonConstExpr,
+                    assigns, context);
         }
         return false;
     }
-    
+
     private boolean replaceWithVariableArg(Mutable<ILogicalExpression> expRef, FunctionIdentifier normFuncIdent,
-    		AsterixConstantValue constVal, VariableReferenceExpression varRefExpr, List<AssignOperator> assigns, IOptimizationContext context) throws AlgebricksException {
-    	
-    	// Find variable in assigns to determine its originating function.    	
-    	LogicalVariable var = varRefExpr.getVariableReference();
-    	Mutable<ILogicalExpression> simFuncExprRef = null;
-    	ScalarFunctionCallExpression simCheckFuncExpr = null;
-    	AssignOperator matchingAssign = null;
-     	for (int i = 0; i < assigns.size(); i++) {
-    		AssignOperator assign = assigns.get(i);
-    		for (int j = 0; j < assign.getVariables().size(); j++) {
-    			// Check if variables match.
-    			if (var != assign.getVariables().get(j)) {
-    				continue;
-    			}
-    			// Check if corresponding expr is a function call.
-    			if (assign.getExpressions().get(j).getValue().getExpressionTag() != LogicalExpressionTag.FUNCTION_CALL) {
-    				continue;
-    			}
-    			simFuncExprRef = assign.getExpressions().get(j);
-    			// Analyze function expression and get equivalent similarity check function.
-    			simCheckFuncExpr = getSimilarityCheckExpr(normFuncIdent, constVal, (AbstractFunctionCallExpression) simFuncExprRef.getValue());
-    			matchingAssign = assign;
-    			break;
-    		}
-    		if (simCheckFuncExpr != null) {
-    			break;
-    		}
-    	}
-    	
-    	// Only non-null if we found that varRefExpr refers to an optimizable similarity function call. 
-    	if (simCheckFuncExpr != null) {
-    		// Create a new assign under matchingAssign which assigns the result of our similarity-check function to a variable.
-    		LogicalVariable newVar = context.newVar();
-    		AssignOperator newAssign = new AssignOperator(newVar, new MutableObject<ILogicalExpression>(simCheckFuncExpr));
-    		// Hook up inputs. 
-    		newAssign.getInputs().add(new MutableObject<ILogicalOperator>(matchingAssign.getInputs().get(0).getValue()));
-    		matchingAssign.getInputs().get(0).setValue(newAssign);    		
-    		
-    		// Replace select condition with a get-item on newVar.
+            AsterixConstantValue constVal, VariableReferenceExpression varRefExpr, List<AssignOperator> assigns,
+            IOptimizationContext context) throws AlgebricksException {
+
+        // Find variable in assigns to determine its originating function.    	
+        LogicalVariable var = varRefExpr.getVariableReference();
+        Mutable<ILogicalExpression> simFuncExprRef = null;
+        ScalarFunctionCallExpression simCheckFuncExpr = null;
+        AssignOperator matchingAssign = null;
+        for (int i = 0; i < assigns.size(); i++) {
+            AssignOperator assign = assigns.get(i);
+            for (int j = 0; j < assign.getVariables().size(); j++) {
+                // Check if variables match.
+                if (var != assign.getVariables().get(j)) {
+                    continue;
+                }
+                // Check if corresponding expr is a function call.
+                if (assign.getExpressions().get(j).getValue().getExpressionTag() != LogicalExpressionTag.FUNCTION_CALL) {
+                    continue;
+                }
+                simFuncExprRef = assign.getExpressions().get(j);
+                // Analyze function expression and get equivalent similarity check function.
+                simCheckFuncExpr = getSimilarityCheckExpr(normFuncIdent, constVal,
+                        (AbstractFunctionCallExpression) simFuncExprRef.getValue());
+                matchingAssign = assign;
+                break;
+            }
+            if (simCheckFuncExpr != null) {
+                break;
+            }
+        }
+
+        // Only non-null if we found that varRefExpr refers to an optimizable similarity function call. 
+        if (simCheckFuncExpr != null) {
+            // Create a new assign under matchingAssign which assigns the result of our similarity-check function to a variable.
+            LogicalVariable newVar = context.newVar();
+            AssignOperator newAssign = new AssignOperator(newVar, new MutableObject<ILogicalExpression>(
+                    simCheckFuncExpr));
+            // Hook up inputs. 
+            newAssign.getInputs()
+                    .add(new MutableObject<ILogicalOperator>(matchingAssign.getInputs().get(0).getValue()));
+            matchingAssign.getInputs().get(0).setValue(newAssign);
+
+            // Replace select condition with a get-item on newVar.
             List<Mutable<ILogicalExpression>> selectGetItemArgs = new ArrayList<Mutable<ILogicalExpression>>();
             // First arg is a variable reference expr on newVar.
             selectGetItemArgs.add(new MutableObject<ILogicalExpression>(new VariableReferenceExpression(newVar)));
             // Second arg is the item index to be accessed, here 0.
-            selectGetItemArgs.add(new MutableObject<ILogicalExpression>(new ConstantExpression(new AsterixConstantValue(new AInt32(0)))));
-            ILogicalExpression selectGetItemExpr = new ScalarFunctionCallExpression(FunctionUtils.getFunctionInfo(AsterixBuiltinFunctions.GET_ITEM), selectGetItemArgs);
+            selectGetItemArgs.add(new MutableObject<ILogicalExpression>(new ConstantExpression(
+                    new AsterixConstantValue(new AInt32(0)))));
+            ILogicalExpression selectGetItemExpr = new ScalarFunctionCallExpression(
+                    FunctionUtils.getFunctionInfo(AsterixBuiltinFunctions.GET_ITEM), selectGetItemArgs);
             // Replace the old similarity function call with the new getItemExpr.
             expRef.setValue(selectGetItemExpr);
-    		
+
             // Replace expr corresponding to original variable in the original assign with a get-item on newVar.
             List<Mutable<ILogicalExpression>> assignGetItemArgs = new ArrayList<Mutable<ILogicalExpression>>();
             // First arg is a variable reference expr on newVar.
             assignGetItemArgs.add(new MutableObject<ILogicalExpression>(new VariableReferenceExpression(newVar)));
             // Second arg is the item index to be accessed, here 1.
-            assignGetItemArgs.add(new MutableObject<ILogicalExpression>(new ConstantExpression(new AsterixConstantValue(new AInt32(1)))));
-            ILogicalExpression assignGetItemExpr = new ScalarFunctionCallExpression(FunctionUtils.getFunctionInfo(AsterixBuiltinFunctions.GET_ITEM), assignGetItemArgs);
+            assignGetItemArgs.add(new MutableObject<ILogicalExpression>(new ConstantExpression(
+                    new AsterixConstantValue(new AInt32(1)))));
+            ILogicalExpression assignGetItemExpr = new ScalarFunctionCallExpression(
+                    FunctionUtils.getFunctionInfo(AsterixBuiltinFunctions.GET_ITEM), assignGetItemArgs);
             // Replace the original assign expr with the get-item expr.
             simFuncExprRef.setValue(assignGetItemExpr);
-    		
+
             context.computeAndSetTypeEnvironmentForOperator(newAssign);
             context.computeAndSetTypeEnvironmentForOperator(matchingAssign);
-            
-    		return true;
-    	}
-    	
-    	return false;
+
+            return true;
+        }
+
+        return false;
     }
-    
+
     private boolean replaceWithFunctionCallArg(Mutable<ILogicalExpression> expRef, FunctionIdentifier normFuncIdent,
-    		AsterixConstantValue constVal, AbstractFunctionCallExpression funcExpr) {
-    	// Analyze func expr to see if it is an optimizable similarity function.
-        ScalarFunctionCallExpression simCheckFuncExpr = getSimilarityCheckExpr(normFuncIdent, constVal, funcExpr); 
-        
+            AsterixConstantValue constVal, AbstractFunctionCallExpression funcExpr) {
+        // Analyze func expr to see if it is an optimizable similarity function.
+        ScalarFunctionCallExpression simCheckFuncExpr = getSimilarityCheckExpr(normFuncIdent, constVal, funcExpr);
+
         // Replace the expr in the select condition.
         if (simCheckFuncExpr != null) {
             // Get item 0 from var.
@@ -205,8 +214,10 @@
             // First arg is the similarity-check function call.
             getItemArgs.add(new MutableObject<ILogicalExpression>(simCheckFuncExpr));
             // Second arg is the item index to be accessed.
-            getItemArgs.add(new MutableObject<ILogicalExpression>(new ConstantExpression(new AsterixConstantValue(new AInt32(0)))));
-            ILogicalExpression getItemExpr = new ScalarFunctionCallExpression(FunctionUtils.getFunctionInfo(AsterixBuiltinFunctions.GET_ITEM), getItemArgs);
+            getItemArgs.add(new MutableObject<ILogicalExpression>(new ConstantExpression(new AsterixConstantValue(
+                    new AInt32(0)))));
+            ILogicalExpression getItemExpr = new ScalarFunctionCallExpression(
+                    FunctionUtils.getFunctionInfo(AsterixBuiltinFunctions.GET_ITEM), getItemArgs);
             // Replace the old similarity function call with the new getItemExpr.
             expRef.setValue(getItemExpr);
             return true;
@@ -214,10 +225,10 @@
 
         return false;
     }
-    
+
     private ScalarFunctionCallExpression getSimilarityCheckExpr(FunctionIdentifier normFuncIdent,
-    		AsterixConstantValue constVal, AbstractFunctionCallExpression funcExpr) {
-    	// Remember args from original similarity function to add them to the similarity-check function later.
+            AsterixConstantValue constVal, AbstractFunctionCallExpression funcExpr) {
+        // Remember args from original similarity function to add them to the similarity-check function later.
         ArrayList<Mutable<ILogicalExpression>> similarityArgs = null;
         ScalarFunctionCallExpression simCheckFuncExpr = null; 
         // Look for jaccard function call, and GE or GT.
@@ -270,11 +281,11 @@
         }
         // Preserve all annotations.
         if (simCheckFuncExpr != null) {
-        	simCheckFuncExpr.getAnnotations().putAll(funcExpr.getAnnotations());
+            simCheckFuncExpr.getAnnotations().putAll(funcExpr.getAnnotations());
         }
         return simCheckFuncExpr;
     }
-    
+
     private FunctionIdentifier getLhsAndRhsSwappedFuncIdent(FunctionIdentifier oldFuncIdent) {
         if (oldFuncIdent == AlgebricksBuiltinFunctions.GE) {
             return AlgebricksBuiltinFunctions.LE;
@@ -290,7 +301,7 @@
         }
         throw new IllegalStateException();
     }
-    
+
     @Override
     public boolean rewritePre(Mutable<ILogicalOperator> opRef, IOptimizationContext context) throws AlgebricksException {
         return false;
diff --git a/asterix-app/data/temporal/temporalData.json b/asterix-app/data/temporal/temporalData.json
new file mode 100644
index 0000000..520fd4b
--- /dev/null
+++ b/asterix-app/data/temporal/temporalData.json
@@ -0,0 +1,3 @@
+{"id": "001", "dateField": date("-2012-12-12"), "dateFieldPlus": date("0990-01-01"), "timeField": time("23:49:12.39Z"), "timeFieldPlus": time("03:23:12.2"), "datetimeField": datetime("2012-12-12T00:00:00.001"), "datetimeFieldPlus": datetime("-00130810T221015398"), "durationField": duration("P20Y19DT3H74M23.34S"), "durationFieldPlus": duration("-P2MT4M300.68S"), "intervalField": dtinterval("2012-12-12T00:00:00.001,20130810T221015398") }
+{"id": "002", "datetimeField": datetime("19201220T232918478") }
+{"id": "003", "intervalPlus": tinterval("19:23:32.328Z,23:20:20") }
\ No newline at end of file
diff --git a/asterix-app/data/temporal/temporalData.txt b/asterix-app/data/temporal/temporalData.txt
new file mode 100644
index 0000000..9ce94f5
--- /dev/null
+++ b/asterix-app/data/temporal/temporalData.txt
@@ -0,0 +1,4 @@
+001|-2012-12-12|23:49:12.39Z|3827-12-12T11:43:29.329|P20Y19DT3H74M23.34S
+002|1993-12-12|03:32:00|-2012-12-12T05:00:23.071|P20Y19D
+003|1839-03-12|12:30:49.382|1012-06-12T00:37:00|PT3H74M23.34S
+999|0003-11-02|23:19:32.382Z|2012-12-12T00:00:00.001|P20YT300H9.34S
diff --git a/asterix-app/src/main/java/edu/uci/ics/asterix/api/aqlj/client/ADMCursor.java b/asterix-app/src/main/java/edu/uci/ics/asterix/api/aqlj/client/ADMCursor.java
index cad8760..a48feba 100644
--- a/asterix-app/src/main/java/edu/uci/ics/asterix/api/aqlj/client/ADMCursor.java
+++ b/asterix-app/src/main/java/edu/uci/ics/asterix/api/aqlj/client/ADMCursor.java
@@ -28,6 +28,7 @@
 import edu.uci.ics.asterix.om.base.AInt32;
 import edu.uci.ics.asterix.om.base.AInt64;
 import edu.uci.ics.asterix.om.base.AInt8;
+import edu.uci.ics.asterix.om.base.AInterval;
 import edu.uci.ics.asterix.om.base.ALine;
 import edu.uci.ics.asterix.om.base.APoint;
 import edu.uci.ics.asterix.om.base.APoint3D;
@@ -228,6 +229,19 @@
     }
 
     @Override
+    public AInterval getInterval() throws AQLJException {
+        checkTypeTag(currentObject, ATypeTag.INTERVAL);
+        return ((AInterval) currentObject);
+    }
+
+    @Override
+    public AInterval getInterval(String field) throws AQLJException {
+        IAObject o = getObjectByField(field);
+        checkTypeTag(o, ATypeTag.INTERVAL);
+        return (AInterval) o;
+    }
+
+    @Override
     public AFloat getFloat() throws AQLJException {
         checkTypeTag(currentObject, ATypeTag.FLOAT);
         return ((AFloat) currentObject);
diff --git a/asterix-app/src/main/java/edu/uci/ics/asterix/api/aqlj/client/IADMCursor.java b/asterix-app/src/main/java/edu/uci/ics/asterix/api/aqlj/client/IADMCursor.java
index a7500c9..51318a1 100644
--- a/asterix-app/src/main/java/edu/uci/ics/asterix/api/aqlj/client/IADMCursor.java
+++ b/asterix-app/src/main/java/edu/uci/ics/asterix/api/aqlj/client/IADMCursor.java
@@ -28,6 +28,7 @@
 import edu.uci.ics.asterix.om.base.AInt32;
 import edu.uci.ics.asterix.om.base.AInt64;
 import edu.uci.ics.asterix.om.base.AInt8;
+import edu.uci.ics.asterix.om.base.AInterval;
 import edu.uci.ics.asterix.om.base.ALine;
 import edu.uci.ics.asterix.om.base.APoint;
 import edu.uci.ics.asterix.om.base.APoint3D;
@@ -79,6 +80,10 @@
 
     public ADuration getDuration(String field) throws AQLJException;
 
+    public AInterval getInterval() throws AQLJException;
+
+    public AInterval getInterval(String field) throws AQLJException;
+
     public AFloat getFloat() throws AQLJException;
 
     public AFloat getFloat(String field) throws AQLJException;
diff --git a/asterix-app/src/test/resources/metadata/results/basic/meta17.adm b/asterix-app/src/test/resources/metadata/results/basic/meta17.adm
index 8a56248..8e7251b 100644
--- a/asterix-app/src/test/resources/metadata/results/basic/meta17.adm
+++ b/asterix-app/src/test/resources/metadata/results/basic/meta17.adm
@@ -47,6 +47,7 @@
 { "DataverseName": "Metadata", "DatatypeName": "int32", "Derived": null, "Timestamp": "Mon Dec 24 14:01:42 PST 2012" }
 { "DataverseName": "Metadata", "DatatypeName": "int64", "Derived": null, "Timestamp": "Mon Dec 24 14:01:42 PST 2012" }
 { "DataverseName": "Metadata", "DatatypeName": "int8", "Derived": null, "Timestamp": "Mon Dec 24 14:01:42 PST 2012" }
+{ "DataverseName": "Metadata", "DatatypeName": "interval", "Derived": null, "Timestamp": "Thu Jan 31 23:28:54 PST 2013" }
 { "DataverseName": "Metadata", "DatatypeName": "line", "Derived": null, "Timestamp": "Mon Dec 24 14:01:42 PST 2012" }
 { "DataverseName": "Metadata", "DatatypeName": "null", "Derived": null, "Timestamp": "Mon Dec 24 14:01:42 PST 2012" }
 { "DataverseName": "Metadata", "DatatypeName": "point", "Derived": null, "Timestamp": "Mon Dec 24 14:01:42 PST 2012" }
diff --git a/asterix-app/src/test/resources/runtimets/queries/comparison/date_order.aql b/asterix-app/src/test/resources/runtimets/queries/comparison/date_order.aql
new file mode 100644
index 0000000..d38d386
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/comparison/date_order.aql
@@ -0,0 +1,16 @@
+drop dataverse test if exists;
+
+create dataverse test;
+
+write output to nc1:"rttest/comparison_date_order.adm";
+
+let $d1 := date("2049-04-23")
+let $d2 := date("2012-02-29")
+let $d3 := date("2021-03-01")
+let $d4 := date("1362-02-28")
+let $d5 := date("1600-02-29")
+let $d6 := date("-0500-03-21")
+
+for $d in [$d1, $d2, $d3, $d4, $d5, $d6]
+order by $d
+return $d
\ No newline at end of file
diff --git a/asterix-app/src/test/resources/runtimets/queries/comparison/time_order.aql b/asterix-app/src/test/resources/runtimets/queries/comparison/time_order.aql
new file mode 100644
index 0000000..ba0d211
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/comparison/time_order.aql
@@ -0,0 +1,16 @@
+drop dataverse test if exists;
+
+create dataverse test;
+
+write output to nc1:"rttest/comparison_time_order.adm";
+
+let $t1 := time("13:00:00.382-10:00")
+let $t2 := time("23:59:59.999Z")
+let $t3 := time("22:00:00+03:00")
+let $t4 := time("00:00:00.00Z")
+let $t5 := time("00:00:00.00-02:00")
+let $t6 := time("00:00:00.47+04:00")
+
+for $t in [$t1, $t2, $t3, $t4, $t5, $t6]
+order by $t
+return $t
\ No newline at end of file
diff --git a/asterix-app/src/test/resources/runtimets/queries/constructor/int_01.aql b/asterix-app/src/test/resources/runtimets/queries/constructor/int_01.aql
index d35c84f..683481f 100644
--- a/asterix-app/src/test/resources/runtimets/queries/constructor/int_01.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/constructor/int_01.aql
@@ -12,5 +12,6 @@
 let $c6 := int16("-160i16")
 let $c7 := int32("-320")
 let $c8 := int64("-640i64")
-return {"int8": $c1,"int16": $c2,"int32": $c3, "int64": $c4, "int8": $c5,"int16": $c6,"int32": $c7, "int64": $c8}
+let $c9 := int64("-9223372036854775808")
+return {"int8": $c1,"int16": $c2,"int32": $c3, "int64": $c4, "int8": $c5,"int16": $c6,"int32": $c7, "int64": $c8, "int64_min" : $c9}
 
diff --git a/asterix-app/src/test/resources/runtimets/queries/constructor/interval.aql b/asterix-app/src/test/resources/runtimets/queries/constructor/interval.aql
new file mode 100644
index 0000000..71e90fa
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/constructor/interval.aql
@@ -0,0 +1,15 @@
+drop dataverse test if exists;
+create dataverse test;
+use dataverse test;
+
+write output to nc1:"rttest/constructor_interval.adm";
+
+let $itv1 := interval-from-date("2010-10-30", "2012-10-21")
+let $itv2 := interval-from-time("03:04:05.678", "232425267")
+let $itv3 := interval-from-datetime("-1987-11-19T02:43:57.938", "1999-11-12T12:49:35.948")
+let $itv4 := interval-start-from-date("0001-12-27", "P3Y394DT48H398.483S")
+let $itv5 := interval-start-from-time("20:03:20.948", "PT48M389.938S")
+let $itv6 := interval-start-from-datetime("-2043-11-19T15:32:39.293", "P439Y3M20DT20H39M58.949S")
+
+return {"interval1": $itv1, "interval2": $itv2, "interval3": $itv3, "interval4": $itv4, "interval5": $itv5, "interval6": $itv6}
+
diff --git a/asterix-app/src/test/resources/runtimets/queries/temp/accessors.aql b/asterix-app/src/test/resources/runtimets/queries/temp/accessors.aql
new file mode 100644
index 0000000..9cc9f8d
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/temp/accessors.aql
@@ -0,0 +1,22 @@
+/*
+ * Description      :   Check temporal accessors for different types
+ * Expected Result  :   Success
+ * Date             :   31st Aug, 2012
+ */
+
+drop dataverse test if exists;
+create dataverse test;
+use dataverse test;
+
+write output to nc1:"rttest/temp_accessors.adm";
+
+let $c1 := date("2010-10-30")
+let $c2 := datetime("1987-11-19T23:49:23.938")
+let $c3 := date("-1987-11-19")
+let $c4 := date("09280329")
+let $c5 := datetime("19371229T20030628")
+let $c6 := time("12:23:34.930+07:00")
+let $c7 := string("-0003-01-09T23:12:12.39-07:00")
+let $c8 := duration("P3Y73M632DT49H743M3948.94S")
+
+return {"year1": year($c1), "year2": year($c2), "year3": year($c3), "year4": year($c4), "year5": year($c5), "year6": year($c7), "year7": year($c8), "month1": month($c1), "month2": month($c2), "month3": month($c3), "month4": month($c4), "month5": month($c5), "month6": month($c8), "day1": day($c1), "day2": day($c2), "day3": day($c3), "day4": day($c4), "day5": day($c5), "day6": day($c8), "hour1": hour($c2), "hour2": hour($c5), "hour3": hour($c6), "hour4": hour($c8), "min1": minute($c2), "min2": minute($c5), "min3": minute($c6), "min4": minute($c8), "second1": second($c2), "second2": second($c5), "second3": second($c6), "second4": second($c8), "ms1": millisecond($c2), "ms2": millisecond($c5), "ms3": millisecond($c6), "ms4": millisecond($c8)}
diff --git a/asterix-app/src/test/resources/runtimets/queries/temp/adjust_timezone.aql b/asterix-app/src/test/resources/runtimets/queries/temp/adjust_timezone.aql
new file mode 100644
index 0000000..9f6c60e
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/temp/adjust_timezone.aql
@@ -0,0 +1,17 @@
+/*
+ * Description      :   Check the adjust-timezone functions
+ * Expected Result  :   Success
+ * Date             :   15th Oct, 2012
+ */
+
+drop dataverse test if exists;
+create dataverse test;
+use dataverse test;
+
+write output to nc1:"rttest/temp_adjust_timezone.adm";
+
+let $t1 := time("20:15:10.327")
+let $dt1 := datetime("2010-10-23T01:12:13.329Z")
+let $s1 := adjust-time-for-timezone($t1, "+0800")
+let $s2 := adjust-datetime-for-timezone($dt1, "-0615")
+return { "string1" : $s1, "string2" : $s2 }
\ No newline at end of file
diff --git a/asterix-app/src/test/resources/runtimets/queries/temp/calendar_duration.aql b/asterix-app/src/test/resources/runtimets/queries/temp/calendar_duration.aql
new file mode 100644
index 0000000..67360ce
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/temp/calendar_duration.aql
@@ -0,0 +1,28 @@
+/*
+ * Description      :   Check the calendar-duration functions
+ * Expected Result  :   Success
+ * Date             :   15th Oct, 2012
+ */
+
+drop dataverse test if exists;
+create dataverse test;
+use dataverse test;
+
+write output to nc1:"rttest/temp_calendar_duration.adm";
+
+let $t1 := datetime("1987-11-19T23:49:23.938")
+let $t2 := date("-1328-10-23")
+let $dr1 := duration("P7382DT39283M3921.329S")
+let $dr2 := duration("-PT63H398212M3219.328S")
+let $dr3 := duration("P1Y90M")
+let $dr4 := duration("-P3Y89M4089DT47382.983S")
+let $cdr1 := calendar-duration-from-datetime($t1, $dr1)
+let $cdr2 := calendar-duration-from-datetime($t1, $dr2)
+let $cdr3 := calendar-duration-from-datetime($t1, $dr3)
+let $cdr4 := calendar-duration-from-datetime($t1, $dr4)
+let $cdr5 := calendar-duration-from-date($t2, $dr1)
+let $cdr6 := calendar-duration-from-date($t2, $dr2)
+let $cdr7 := calendar-duration-from-date($t2, $dr3)
+let $cdr8 := calendar-duration-from-date($t2, $dr4)
+
+return { "cduration1":$cdr1, "cduration2":$cdr2, "cduration3":$cdr3, "cduration4":$cdr4, "cduration5":$cdr5, "cduration6":$cdr6, "cduration7":$cdr7, "cduration8":$cdr8 }
diff --git a/asterix-app/src/test/resources/runtimets/queries/temp/date_functions.aql b/asterix-app/src/test/resources/runtimets/queries/temp/date_functions.aql
new file mode 100644
index 0000000..310fa43
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/temp/date_functions.aql
@@ -0,0 +1,24 @@
+/*
+ * Description      :   Check temporal functions for date type
+ * Expected Result  :   Success
+ * Date             :   24th Sep, 2012
+ */
+drop dataverse test if exists;
+create dataverse test;
+use dataverse test;
+
+write output to nc1:"rttest/temp_date_functions.adm";
+
+let $d1 := date-from-unix-time-in-days(15600)
+let $dt1 := datetime("1327-12-02T23:35:49.938Z")
+let $d2 := date-from-datetime($dt1)
+let $dt2 := datetime("2012-10-11T02:30:23+03:00")
+let $d3 := date-from-datetime($dt2)
+let $dr1 := duration("-P2Y1M90DT30H")
+let $d4 := add-date-duration($d1, $dr1)
+let $dr2 := duration("P300Y900MT360000M")
+let $d5 := add-date-duration($d2, $dr2)
+let $dr3 := subtract-date($d5, $d2)
+let $dr4 := subtract-date($d4, $d1)
+
+return { "date1" : $d1, "date2" : $d2, "date3" : $d3, "date4" : $d4, "date5" : $d5, "duration1" : $dr3, "duration2" : $dr4  }
\ No newline at end of file
diff --git a/asterix-app/src/test/resources/runtimets/queries/temp/datetime_functions.aql b/asterix-app/src/test/resources/runtimets/queries/temp/datetime_functions.aql
new file mode 100644
index 0000000..a70c9f2
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/temp/datetime_functions.aql
@@ -0,0 +1,20 @@
+/*
+ * Description      :   Check temporal functions for datetime
+ * Expected Result  :   Success
+ * Date             :   24th Sep, 2012
+ */
+
+drop dataverse test if exists;
+create dataverse test;
+use dataverse test;
+
+write output to nc1:"rttest/temp_datetime_functions.adm";
+
+let $dt1 := datetime-from-unix-time-in-ms(956007429)
+let $d1 := date("1327-12-02")
+let $t1 := time("23:35:49.938Z")
+let $dt2 := datetime-from-date-time($d1, $t1)
+let $dr1 := subtract-datetime($dt2, $dt1)
+let $dt3 := add-datetime-duration($dt1, $dr1)
+
+return { "datetime1" : $dt1, "datetime2" : $dt2, "datetime3" : $dt3, "duration1" : $dr1 }
\ No newline at end of file
diff --git a/asterix-app/src/test/resources/runtimets/queries/temp/insert_from_delimited_ds.aql b/asterix-app/src/test/resources/runtimets/queries/temp/insert_from_delimited_ds.aql
new file mode 100644
index 0000000..4520f46
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/temp/insert_from_delimited_ds.aql
@@ -0,0 +1,26 @@
+/*
+ * Test case name: date-insert.aql
+ * Description: verify insertion operation for date type
+ * Expected result: success
+ */
+ 
+drop dataverse testdvt if exists;
+create dataverse testdvt;
+use dataverse testdvt;
+
+create type testtype as closed {
+  id: string,
+  dateField: date,
+  timeField: time,
+  datetimeField: datetime,
+  durationField: duration
+}
+
+write output to nc1:"rttest/temp_insert_from_delimited_ds.adm";
+
+create external dataset testds(testtype)
+using "edu.uci.ics.asterix.external.dataset.adapter.NCFileSystemAdapter"
+(("path"="nc1://data/temporal/temporalData.txt"),("format"="delimited-text"),("delimiter"="|"));
+
+for $r in dataset("testds") 
+return {"date": $r.dateField, "time": $r.timeField, "datetime": $r.datetimeField, "duration": $r.durationField }
\ No newline at end of file
diff --git a/asterix-app/src/test/resources/runtimets/queries/temp/insert_from_ext_ds.aql b/asterix-app/src/test/resources/runtimets/queries/temp/insert_from_ext_ds.aql
new file mode 100644
index 0000000..5813696
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/temp/insert_from_ext_ds.aql
@@ -0,0 +1,27 @@
+/*
+ * Test case name: date-insert.aql
+ * Description: verify insertion operation for date type
+ * Expected result: success
+ */
+ 
+drop dataverse testdvt if exists;
+create dataverse testdvt;
+use dataverse testdvt;
+
+create type testtype as open {
+  id: string,
+  dateField: date?,
+  timeField: time?,
+  datetimeField: datetime?,
+  durationField: duration?,
+  intervalField: interval?
+}
+
+write output to nc1:"rttest/temp_insert_from_ext_ds.adm";
+
+create external dataset testds(testtype)
+using "edu.uci.ics.asterix.external.dataset.adapter.NCFileSystemAdapter"
+(("path"="nc1://data/temporal/temporalData.json"),("format"="adm"));
+
+for $r in dataset("testds") 
+return {"date": $r.dateField, "time": $r.timeField, "datetime": $r.datetimeField, "duration": $r.durationField, "interval": $r.intervalField }
\ No newline at end of file
diff --git a/asterix-app/src/test/resources/runtimets/queries/temp/interval_functions.aql b/asterix-app/src/test/resources/runtimets/queries/temp/interval_functions.aql
new file mode 100644
index 0000000..a29f7f5
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/temp/interval_functions.aql
@@ -0,0 +1,56 @@
+/*
+ * Description      :   Check temporal functions for interval
+ * Expected Result  :   Success
+ * Date             :   2nd Nov, 2012
+ */
+
+drop dataverse test if exists;
+create dataverse test;
+use dataverse test;
+
+write output to nc1:"rttest/temp_interval_functions.adm";
+
+let $itv1 := interval-from-date("2010-10-30", "2010-12-21")
+let $itv2 := interval-from-date("2011-10-30", "2012-10-21")
+let $itv3 := interval-from-date("2010-06-30", "2013-01-01")
+let $blnBefore1 := interval-before($itv1, $itv2)
+let $blnAfter1 := interval-after($itv2, $itv1)
+let $blnBefore2 := interval-before($itv1, $itv3)
+let $blnAfter2 := interval-after($itv3, $itv1)
+
+let $itv4 := interval-from-datetime("2012-06-26T01:01:01.111", "2012-07-27T02:02:02.222")
+let $itv5 := interval-from-datetime("20120727T020202222", "2013-08-08T03:03:03.333")
+let $itv6 := interval-from-datetime("19000707T020202222", "2013-08-07T03:03:03.333")
+let $blnMeet1 := interval-meets($itv4, $itv5)
+let $blnMetBy1 := interval-met-by($itv5, $itv4)
+let $blnMeet2 := interval-meets($itv6, $itv4)
+let $blnMetBy2 := interval-met-by($itv6, $itv4)
+
+let $itv7 := interval-from-time("12:32:38", "20:29:20")
+let $itv8 := interval-from-time("17:48:19", "22:19:49")
+let $itv9 := interval-from-time("01:32:49", "12:33:00")
+let $blnOverlaps1 := interval-overlaps($itv7, $itv8)
+let $blnOverlapped1 := interval-overlapped-by($itv8, $itv7)
+let $blnOverlaps2 := interval-overlaps($itv8, $itv7)
+let $blnOverlapped2 := interval-overlapped-by($itv7, $itv8)
+let $blnOverlap1 := overlap($itv9, $itv7)
+let $blnOverlap2 := overlap($itv9, $itv8)
+
+let $itv10 := interval-from-date("2010-10-30", "2010-11-30")
+let $blnStarts1 := interval-starts($itv10, $itv1)
+let $blnStarts2 := interval-starts($itv10, $itv2)
+let $blnStartedBy1 := interval-started-by($itv1, $itv10)
+let $blnStartedBy2 := interval-started-by($itv10, $itv2)
+
+let $blnCovers1 := interval-covers($itv6, $itv4)
+let $blnCovers2 := interval-covers($itv6, $itv5)
+let $blnCoveredBy1 := interval-covered-by($itv4, $itv6)
+let $blnCoveredBy2 := interval-covered-by($itv5, $itv6)
+
+let $itv11 := interval-from-time("19:00:00.009", "20:29:20.000")
+let $blnEnds1 := interval-ends($itv11, $itv7)
+let $blnEnds2 := interval-ends($itv11, $itv8)
+let $blnEndedBy1 := interval-ended-by($itv7, $itv11)
+let $blnEndedBy2 := interval-ended-by($itv8, $itv11)
+
+return { "before1" : $blnBefore1, "before2" : $blnBefore2, "after1" : $blnAfter1, "after2" : $blnAfter2, "meet1" : $blnMeet1, "meet2" : $blnMeet2, "metby1" : $blnMetBy1, "metby2" : $blnMetBy2, "overlaps1" : $blnOverlaps1, "overlaps2" : $blnOverlaps2, "overlapped1" : $blnOverlapped1, "overlapped2" : $blnOverlapped2, "overlap1" : $blnOverlap1, "overlap2" : $blnOverlap2, "starts1" : $blnStarts1, "starts2" : $blnStarts2, "startedby1" : $blnStartedBy1, "startedby2" : $blnStartedBy2, "covers1" : $blnCovers1, "covers2" : $blnCovers2, "coveredby1" : $blnCoveredBy1, "coveredby2" : $blnCoveredBy2, "ends1" : $blnEnds1, "ends2" : $blnEnds2, "endedby1" : $blnEndedBy1, "endedby2" : $blnEndedBy2 }
\ No newline at end of file
diff --git a/asterix-app/src/test/resources/runtimets/queries/temp/time_functions.aql b/asterix-app/src/test/resources/runtimets/queries/temp/time_functions.aql
new file mode 100644
index 0000000..29adcc0
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/queries/temp/time_functions.aql
@@ -0,0 +1,28 @@
+/*
+ * Description      :   Check temporal functions for time
+ * Expected Result  :   Success
+ * Date             :   24th Sep, 2012
+ */
+
+drop dataverse test if exists;
+create dataverse test;
+use dataverse test;
+
+write output to nc1:"rttest/temp_time_functions.adm";
+
+let $t1 := time-from-unix-time-in-ms(1560074)
+let $dt1 := datetime("1327-12-02T23:35:49.938Z")
+let $t2 := time-from-datetime($dt1)
+let $dt2 := datetime("2012-10-11T02:30:23+03:00")
+let $t3 := time-from-datetime($dt2)
+let $dr1 := duration("-PT30H")
+let $t4 := add-time-duration($t1, $dr1)
+let $dr2 := duration("PT36M")
+let $t5 := add-time-duration($t2, $dr2)
+let $dr3 := subtract-time($t5, $t2)
+let $dr4 := subtract-time($t4, $t1)
+let $ct := current-time()
+let $cd := current-date()
+let $cdt := current-datetime()
+
+return { "time1" : $t1, "time2" : $t2, "time3" : $t3, "time4" : $t4, "time5" : $t5, "duration1" : $dr3, "duration2" : $dr4  }
\ No newline at end of file
diff --git a/asterix-app/src/test/resources/runtimets/results/comparison/date_order.adm b/asterix-app/src/test/resources/runtimets/results/comparison/date_order.adm
new file mode 100644
index 0000000..3fd4c19
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/comparison/date_order.adm
@@ -0,0 +1,6 @@
+date("-0500-03-21")
+date("1362-02-28")
+date("1600-02-29")
+date("2012-02-29")
+date("2021-03-01")
+date("2049-04-23")
\ No newline at end of file
diff --git a/asterix-app/src/test/resources/runtimets/results/comparison/time_order.adm b/asterix-app/src/test/resources/runtimets/results/comparison/time_order.adm
new file mode 100644
index 0000000..c937bdd
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/comparison/time_order.adm
@@ -0,0 +1,6 @@
+time("00:00:00.000Z")
+time("02:00:00.000Z")
+time("19:00:00.000Z")
+time("20:00:00.470Z")
+time("23:00:00.382Z")
+time("23:59:59.999Z")
\ No newline at end of file
diff --git a/asterix-app/src/test/resources/runtimets/results/constructor/int_01.adm b/asterix-app/src/test/resources/runtimets/results/constructor/int_01.adm
index f9a1203..fb52e3b 100644
--- a/asterix-app/src/test/resources/runtimets/results/constructor/int_01.adm
+++ b/asterix-app/src/test/resources/runtimets/results/constructor/int_01.adm
@@ -1 +1 @@
-{ "int8": 80i8, "int16": 160i16, "int32": 320, "int64": 640i64, "int8": -80i8, "int16": -160i16, "int32": -320, "int64": -640i64 }
\ No newline at end of file
+{ "int8": 80i8, "int16": 160i16, "int32": 320, "int64": 640i64, "int8": -80i8, "int16": -160i16, "int32": -320, "int64": -640i64, "int64_min": -9223372036854775808i64 }
\ No newline at end of file
diff --git a/asterix-app/src/test/resources/runtimets/results/constructor/interval.adm b/asterix-app/src/test/resources/runtimets/results/constructor/interval.adm
new file mode 100644
index 0000000..8fb7e25
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/constructor/interval.adm
@@ -0,0 +1 @@
+{ "interval1": interval("date("2010-10-30"), date("2012-10-21")"), "interval2": interval("time("03:04:05.678Z"), time("23:24:25.267Z")"), "interval3": interval("datetime("-1987-11-19T02:43:57.938Z"), datetime("1999-11-12T12:49:35.948Z")"), "interval4": interval("date("0001-12-27"), date("0006-01-27")"), "interval5": interval("time("20:03:20.948Z"), time("20:57:50.886Z")"), "interval6": interval("datetime("-2043-11-19T15:32:39.293Z"), datetime("-1603-03-12T12:12:38.242Z")") }
\ No newline at end of file
diff --git a/asterix-app/src/test/resources/runtimets/results/temp/accessors.adm b/asterix-app/src/test/resources/runtimets/results/temp/accessors.adm
new file mode 100644
index 0000000..4f36f91
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/temp/accessors.adm
@@ -0,0 +1 @@
+{ "year1": 2010, "year2": 1987, "year3": -1987, "year4": 928, "year5": 1937, "year6": -3, "year7": 9, "month1": 10, "month2": 11, "month3": 11, "month4": 3, "month5": 12, "month6": 1, "day1": 30, "day2": 19, "day3": 19, "day4": 29, "day5": 29, "day6": 634, "hour1": 23, "hour2": 20, "hour3": 5, "hour4": 14, "min1": 49, "min2": 3, "min3": 23, "min4": 28, "second1": 23, "second2": 6, "second3": 34, "second4": 48, "ms1": 938, "ms2": 280, "ms3": 930, "ms4": 94 }
\ No newline at end of file
diff --git a/asterix-app/src/test/resources/runtimets/results/temp/adjust_timezone.adm b/asterix-app/src/test/resources/runtimets/results/temp/adjust_timezone.adm
new file mode 100644
index 0000000..1f80fd9
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/temp/adjust_timezone.adm
@@ -0,0 +1 @@
+{ "string1": "04:15:10.327+08:00", "string2": "2010-10-22T18:57:13.329-06:15" }
\ No newline at end of file
diff --git a/asterix-app/src/test/resources/runtimets/results/temp/calendar_duration.adm b/asterix-app/src/test/resources/runtimets/results/temp/calendar_duration.adm
new file mode 100644
index 0000000..eb7d565
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/temp/calendar_duration.adm
@@ -0,0 +1 @@
+{ "cduration1": duration("P20Y3M13DT7H48M21.329S"), "cduration2": duration("-P9M6DT4H45M39.328S"), "cduration3": duration("P8Y6M"), "cduration4": duration("-P21Y7M10DT13H9M42.983S"), "cduration5": duration("P20Y3M12DT7H48M21.329S"), "cduration6": duration("-P9M5DT4H45M39.328S"), "cduration7": duration("P8Y6M"), "cduration8": duration("-P21Y7M10DT13H9M42.983S") }
\ No newline at end of file
diff --git a/asterix-app/src/test/resources/runtimets/results/temp/date_functions.adm b/asterix-app/src/test/resources/runtimets/results/temp/date_functions.adm
new file mode 100644
index 0000000..2276f85
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/temp/date_functions.adm
@@ -0,0 +1 @@
+{ "date1": date("2012-09-17"), "date2": date("1327-12-02"), "date3": date("2012-10-10"), "date4": date("2010-05-17"), "date5": date("1703-08-09"), "duration1": duration("P137216D"), "duration2": duration("-P854D") }
\ No newline at end of file
diff --git a/asterix-app/src/test/resources/runtimets/results/temp/datetime_functions.adm b/asterix-app/src/test/resources/runtimets/results/temp/datetime_functions.adm
new file mode 100644
index 0000000..6ebc562
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/temp/datetime_functions.adm
@@ -0,0 +1 @@
+{ "datetime1": datetime("1970-01-12T01:33:27.429Z"), "datetime2": datetime("1327-12-02T23:35:49.938Z"), "datetime3": datetime("1327-12-02T23:35:49.938Z"), "duration1": duration("-P234526DT1H57M37.491S") }
\ No newline at end of file
diff --git a/asterix-app/src/test/resources/runtimets/results/temp/insert_from_delimited_ds.adm b/asterix-app/src/test/resources/runtimets/results/temp/insert_from_delimited_ds.adm
new file mode 100644
index 0000000..5c40e46
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/temp/insert_from_delimited_ds.adm
@@ -0,0 +1,4 @@
+{ "date": date("-2012-12-12"), "time": time("23:49:12.390Z"), "datetime": datetime("3827-12-12T11:43:29.329Z"), "duration": duration("P20Y19DT4H14M23.34S") }
+{ "date": date("1993-12-12"), "time": time("03:32:00.000Z"), "datetime": datetime("-2012-12-12T05:00:23.071Z"), "duration": duration("P20Y19D") }
+{ "date": date("1839-03-12"), "time": time("12:30:49.382Z"), "datetime": datetime("1012-06-12T00:37:00.000Z"), "duration": duration("PT4H14M23.34S") }
+{ "date": date("0003-11-02"), "time": time("23:19:32.382Z"), "datetime": datetime("2012-12-12T00:00:00.001Z"), "duration": duration("P20Y12DT12H9.34S") }
\ No newline at end of file
diff --git a/asterix-app/src/test/resources/runtimets/results/temp/insert_from_ext_ds.adm b/asterix-app/src/test/resources/runtimets/results/temp/insert_from_ext_ds.adm
new file mode 100644
index 0000000..afe2ccc
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/temp/insert_from_ext_ds.adm
@@ -0,0 +1,3 @@
+{ "date": date("-2012-12-12"), "time": time("23:49:12.390Z"), "datetime": datetime("2012-12-12T00:00:00.001Z"), "duration": duration("P20Y19DT4H14M23.34S"), "interval": interval("datetime("2012-12-12T00:00:00.001Z"), datetime("2013-08-10T22:10:15.398Z")") }
+{ "date": null, "time": null, "datetime": datetime("1920-12-20T23:29:18.478Z"), "duration": null, "interval": null }
+{ "date": null, "time": null, "datetime": null, "duration": null, "interval": null }
\ No newline at end of file
diff --git a/asterix-app/src/test/resources/runtimets/results/temp/interval_functions.adm b/asterix-app/src/test/resources/runtimets/results/temp/interval_functions.adm
new file mode 100644
index 0000000..9f9c9d3
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/temp/interval_functions.adm
@@ -0,0 +1 @@
+{ "before1": true, "before2": false, "after1": true, "after2": false, "meet1": true, "meet2": false, "metby1": true, "metby2": false, "overlaps1": true, "overlaps2": false, "overlapped1": true, "overlapped2": false, "overlap1": true, "overlap2": false, "starts1": true, "starts2": false, "startedby1": true, "startedby2": false, "covers1": true, "covers2": false, "coveredby1": true, "coveredby2": false, "ends1": true, "ends2": false, "endedby1": true, "endedby2": false }
\ No newline at end of file
diff --git a/asterix-app/src/test/resources/runtimets/results/temp/time_functions.adm b/asterix-app/src/test/resources/runtimets/results/temp/time_functions.adm
new file mode 100644
index 0000000..56531bd
--- /dev/null
+++ b/asterix-app/src/test/resources/runtimets/results/temp/time_functions.adm
@@ -0,0 +1 @@
+{ "time1": time("00:26:00.074Z"), "time2": time("23:35:49.938Z"), "time3": time("23:30:23.000Z"), "time4": time("18:26:00.074Z"), "time5": time("00:11:49.938Z"), "duration1": duration("-PT23H24M"), "duration2": duration("PT18H") }
\ No newline at end of file
diff --git a/asterix-external-data/pom.xml b/asterix-external-data/pom.xml
index 36e7a71..3076323 100644
--- a/asterix-external-data/pom.xml
+++ b/asterix-external-data/pom.xml
@@ -6,6 +6,7 @@
 		<version>0.0.4-SNAPSHOT</version>
 	</parent>
 	<artifactId>asterix-external-data</artifactId>
+
 	<build>
 		<plugins>
 			<plugin>
diff --git a/asterix-metadata/pom.xml b/asterix-metadata/pom.xml
index 459d4d0..58566f8 100644
--- a/asterix-metadata/pom.xml
+++ b/asterix-metadata/pom.xml
@@ -6,6 +6,7 @@
 		<version>0.0.4-SNAPSHOT</version>
 	</parent>
 	<artifactId>asterix-metadata</artifactId>
+
 	<build>
 		<plugins>
 			<plugin>
diff --git a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/entities/AsterixBuiltinTypeMap.java b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/entities/AsterixBuiltinTypeMap.java
index 734237e..27cf542 100644
--- a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/entities/AsterixBuiltinTypeMap.java
+++ b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/entities/AsterixBuiltinTypeMap.java
@@ -40,6 +40,7 @@
         _builtinTypeMap.put("time", BuiltinType.ATIME);
         _builtinTypeMap.put("datetime", BuiltinType.ADATETIME);
         _builtinTypeMap.put("duration", BuiltinType.ADURATION);
+        _builtinTypeMap.put("interval", BuiltinType.AINTERVAL);
         _builtinTypeMap.put("point", BuiltinType.APOINT);
         _builtinTypeMap.put("point3d", BuiltinType.APOINT3D);
         _builtinTypeMap.put("line", BuiltinType.ALINE);
diff --git a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/entities/Index.java b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/entities/Index.java
index 2aade27..4265630 100644
--- a/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/entities/Index.java
+++ b/asterix-metadata/src/main/java/edu/uci/ics/asterix/metadata/entities/Index.java
@@ -123,27 +123,27 @@
         }
         throw new AlgebricksException("Could not find field " + expr + " in the schema.");
     }
-    
+
     @Override
     public int hashCode() {
-    	return indexName.hashCode() ^ datasetName.hashCode() ^ dataverseName.hashCode();
+        return indexName.hashCode() ^ datasetName.hashCode() ^ dataverseName.hashCode();
     }
-    
+
     @Override
     public boolean equals(Object other) {
-    	if (!(other instanceof Index)) {
-    		return false;
-    	}
-    	Index otherIndex = (Index) other;
-    	if (!indexName.equals(otherIndex.getIndexName())) {
-    		return false;
-    	}
-    	if (!datasetName.equals(otherIndex.getDatasetName())) {
-    		return false;
-    	}
-    	if (!dataverseName.equals(otherIndex.getDataverseName())) {
-    		return false;
-    	}
-    	return true;
+        if (!(other instanceof Index)) {
+            return false;
+        }
+        Index otherIndex = (Index) other;
+        if (!indexName.equals(otherIndex.getIndexName())) {
+            return false;
+        }
+        if (!datasetName.equals(otherIndex.getDatasetName())) {
+            return false;
+        }
+        if (!dataverseName.equals(otherIndex.getDataverseName())) {
+            return false;
+        }
+        return true;
     }
 }
diff --git a/asterix-om/pom.xml b/asterix-om/pom.xml
index 5368f07..8cceaa0 100644
--- a/asterix-om/pom.xml
+++ b/asterix-om/pom.xml
@@ -6,6 +6,7 @@
 		<version>0.0.4-SNAPSHOT</version>
 	</parent>
 	<artifactId>asterix-om</artifactId>
+
 	<build>
 		<plugins>
 			<plugin>
@@ -44,6 +45,6 @@
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
 			<artifactId>hyracks-storage-am-rtree</artifactId>
-			</dependency>
+		</dependency>
 	</dependencies>
 </project>
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/comparators/ADateOrTimeAscBinaryComparatorFactory.java b/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/comparators/ADateOrTimeAscBinaryComparatorFactory.java
new file mode 100644
index 0000000..464a03c
--- /dev/null
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/comparators/ADateOrTimeAscBinaryComparatorFactory.java
@@ -0,0 +1,56 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.dataflow.data.nontagged.comparators;
+
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparator;
+import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory;
+
+public class ADateOrTimeAscBinaryComparatorFactory implements IBinaryComparatorFactory {
+
+    private static final long serialVersionUID = 1L;
+
+    public static final ADateOrTimeAscBinaryComparatorFactory INSTANCE = new ADateOrTimeAscBinaryComparatorFactory();
+
+    private ADateOrTimeAscBinaryComparatorFactory() {
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparatorFactory#createBinaryComparator()
+     */
+    @Override
+    public IBinaryComparator createBinaryComparator() {
+        return new IBinaryComparator() {
+
+            @Override
+            public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2) {
+                int chrononTime1 = getInt(b1, s1);
+                int chrononTime2 = getInt(b2, s2);
+
+                if (chrononTime1 > chrononTime2) {
+                    return 1;
+                } else if (chrononTime1 < chrononTime2) {
+                    return -1;
+                } else {
+                    return 0;
+                }
+            }
+
+            private int getInt(byte[] bytes, int start) {
+                return ((bytes[start] & 0xff) << 24) + ((bytes[start + 1] & 0xff) << 16)
+                        + ((bytes[start + 2] & 0xff) << 8) + ((bytes[start + 3] & 0xff) << 0);
+            }
+        };
+    }
+}
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/comparators/AObjectAscBinaryComparatorFactory.java b/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/comparators/AObjectAscBinaryComparatorFactory.java
index 881590d..0e486e7 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/comparators/AObjectAscBinaryComparatorFactory.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/comparators/AObjectAscBinaryComparatorFactory.java
@@ -24,15 +24,21 @@
     public IBinaryComparator createBinaryComparator() {
         return new IBinaryComparator() {
             final IBinaryComparator ascBoolComp = BooleanBinaryComparatorFactory.INSTANCE.createBinaryComparator();
-            final IBinaryComparator ascIntComp = new PointableBinaryComparatorFactory(IntegerPointable.FACTORY).createBinaryComparator();
+            final IBinaryComparator ascIntComp = new PointableBinaryComparatorFactory(IntegerPointable.FACTORY)
+                    .createBinaryComparator();
             final IBinaryComparator ascLongComp = LongBinaryComparatorFactory.INSTANCE.createBinaryComparator();
-            final IBinaryComparator ascStrComp = new PointableBinaryComparatorFactory(UTF8StringPointable.FACTORY).createBinaryComparator();
-            final IBinaryComparator ascFloatComp = new PointableBinaryComparatorFactory(FloatPointable.FACTORY).createBinaryComparator();
-            final IBinaryComparator ascDoubleComp = new PointableBinaryComparatorFactory(DoublePointable.FACTORY).createBinaryComparator();
+            final IBinaryComparator ascStrComp = new PointableBinaryComparatorFactory(UTF8StringPointable.FACTORY)
+                    .createBinaryComparator();
+            final IBinaryComparator ascFloatComp = new PointableBinaryComparatorFactory(FloatPointable.FACTORY)
+                    .createBinaryComparator();
+            final IBinaryComparator ascDoubleComp = new PointableBinaryComparatorFactory(DoublePointable.FACTORY)
+                    .createBinaryComparator();
             final IBinaryComparator ascRectangleComp = RectangleBinaryComparatorFactory.INSTANCE
                     .createBinaryComparator();
             final IBinaryComparator ascDateTimeComp = ADateTimeAscBinaryComparatorFactory.INSTANCE
                     .createBinaryComparator();
+            final IBinaryComparator ascDateOrTimeComp = ADateOrTimeAscBinaryComparatorFactory.INSTANCE
+                    .createBinaryComparator();
 
             @Override
             public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2) {
@@ -73,6 +79,10 @@
                     case DATETIME: {
                         return ascDateTimeComp.compare(b1, s1 + 1, l1 - 1, b2, s2 + 1, l2 - 1);
                     }
+                    case TIME:
+                    case DATE: {
+                        return ascDateOrTimeComp.compare(b1, s1 + 1, l1 - 1, b2, s2 + 1, l2 - 1);
+                    }
                     default: {
                         throw new NotImplementedException("Comparison for type " + tag + " is not implemented");
                     }
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/printers/AIntervalPrinter.java b/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/printers/AIntervalPrinter.java
new file mode 100644
index 0000000..99c40b2
--- /dev/null
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/printers/AIntervalPrinter.java
@@ -0,0 +1,70 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.dataflow.data.nontagged.printers;
+
+import java.io.PrintStream;
+
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AInt8SerializerDeserializer;
+import edu.uci.ics.asterix.om.types.ATypeTag;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.data.IPrinter;
+
+public class AIntervalPrinter implements IPrinter {
+
+    private static final long serialVersionUID = 1L;
+
+    public static final AIntervalPrinter INSTANCE = new AIntervalPrinter();
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.hyracks.algebricks.data.IPrinter#init()
+     */
+    @Override
+    public void init() throws AlgebricksException {
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.hyracks.algebricks.data.IPrinter#print(byte[], int, int, java.io.PrintStream)
+     */
+    @Override
+    public void print(byte[] b, int s, int l, PrintStream ps) throws AlgebricksException {
+        ps.print("interval(\"");
+
+        short typetag = AInt8SerializerDeserializer.getByte(b, s + 1 + 8 * 2);
+
+        IPrinter timeInstancePrinter;
+
+        if (typetag == ATypeTag.DATE.serialize()) {
+            timeInstancePrinter = ADatePrinter.INSTANCE;
+        } else if (typetag == ATypeTag.TIME.serialize()) {
+            timeInstancePrinter = ATimePrinter.INSTANCE;
+        } else if (typetag == ATypeTag.DATETIME.serialize()) {
+            timeInstancePrinter = ADateTimePrinter.INSTANCE;
+        } else {
+            throw new AlgebricksException("Unsupport internal time types in interval: " + typetag);
+        }
+
+        if (typetag == ATypeTag.TIME.serialize() || typetag == ATypeTag.DATE.serialize()) {
+            timeInstancePrinter.print(b, s + 1 + 4 - 1, 8, ps);
+            ps.print(", ");
+            timeInstancePrinter.print(b, s + 1 + 8 + 4 - 1, 8, ps);
+        } else {
+            timeInstancePrinter.print(b, s, 8, ps);
+            ps.print(", ");
+            timeInstancePrinter.print(b, s + 1 + 8 - 1, 8, ps);
+        }
+
+        ps.print("\")");
+    }
+}
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/printers/AIntervalPrinterFactory.java b/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/printers/AIntervalPrinterFactory.java
new file mode 100644
index 0000000..5500091
--- /dev/null
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/printers/AIntervalPrinterFactory.java
@@ -0,0 +1,30 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.dataflow.data.nontagged.printers;
+
+import edu.uci.ics.hyracks.algebricks.data.IPrinter;
+import edu.uci.ics.hyracks.algebricks.data.IPrinterFactory;
+
+public class AIntervalPrinterFactory implements IPrinterFactory {
+
+    private static final long serialVersionUID = 1L;
+    public static final AIntervalPrinterFactory INSTANCE = new AIntervalPrinterFactory();
+
+    @Override
+    public IPrinter createPrinter() {
+        return AIntervalPrinter.INSTANCE;
+    }
+
+}
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/printers/AObjectPrinter.java b/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/printers/AObjectPrinter.java
index edcfc8a..478ad2c 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/printers/AObjectPrinter.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/printers/AObjectPrinter.java
@@ -73,6 +73,10 @@
                 ADurationPrinter.INSTANCE.print(b, s, l, ps);
                 break;
             }
+            case INTERVAL: {
+                AIntervalPrinter.INSTANCE.print(b, s, l, ps);
+                break;
+            }
             case POINT: {
                 APointPrinter.INSTANCE.print(b, s, l, ps);
                 break;
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/serde/ADateSerializerDeserializer.java b/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/serde/ADateSerializerDeserializer.java
index 9bd25f4..86a9a8d 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/serde/ADateSerializerDeserializer.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/serde/ADateSerializerDeserializer.java
@@ -21,7 +21,7 @@
 import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
 import edu.uci.ics.asterix.om.base.ADate;
 import edu.uci.ics.asterix.om.base.AMutableDate;
-import edu.uci.ics.asterix.om.base.temporal.ADateAndTimeParser;
+import edu.uci.ics.asterix.om.base.temporal.ADateParserFactory;
 import edu.uci.ics.asterix.om.base.temporal.GregorianCalendarSystem;
 import edu.uci.ics.asterix.om.base.temporal.StringCharSequenceAccessor;
 import edu.uci.ics.asterix.om.types.BuiltinType;
@@ -64,8 +64,8 @@
         long chrononTimeInMs = 0;
         try {
             StringCharSequenceAccessor charAccessor = new StringCharSequenceAccessor();
-            charAccessor.reset(date, 0);
-            chrononTimeInMs = ADateAndTimeParser.parseDatePart(charAccessor, true);
+            charAccessor.reset(date, 0, date.length());
+            chrononTimeInMs = ADateParserFactory.parseDatePart(charAccessor, true);
         } catch (Exception e) {
             throw new HyracksDataException(e);
         }
@@ -78,4 +78,8 @@
 
         dateSerde.serialize(aDate, out);
     }
+
+    public static int getChronon(byte[] byteArray, int offset) {
+        return AInt32SerializerDeserializer.getInt(byteArray, offset);
+    }
 }
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/serde/ADateTimeSerializerDeserializer.java b/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/serde/ADateTimeSerializerDeserializer.java
index cb9e8e0..cedfc8d 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/serde/ADateTimeSerializerDeserializer.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/serde/ADateTimeSerializerDeserializer.java
@@ -21,7 +21,8 @@
 import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
 import edu.uci.ics.asterix.om.base.ADateTime;
 import edu.uci.ics.asterix.om.base.AMutableDateTime;
-import edu.uci.ics.asterix.om.base.temporal.ADateAndTimeParser;
+import edu.uci.ics.asterix.om.base.temporal.ADateParserFactory;
+import edu.uci.ics.asterix.om.base.temporal.ATimeParserFactory;
 import edu.uci.ics.asterix.om.base.temporal.StringCharSequenceAccessor;
 import edu.uci.ics.asterix.om.types.BuiltinType;
 import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
@@ -66,7 +67,7 @@
         long chrononTimeInMs = 0;
         try {
             StringCharSequenceAccessor charAccessor = new StringCharSequenceAccessor();
-            charAccessor.reset(datetime, 0);
+            charAccessor.reset(datetime, 0, datetime.length());
 
             // +1 if it is negative (-)
             short timeOffset = (short) ((charAccessor.getCharAt(0) == '-') ? 1 : 0);
@@ -78,11 +79,11 @@
             // if extended form 11, else 9
             timeOffset += (charAccessor.getCharAt(timeOffset + 13) == ':') ? (short) (11) : (short) (9);
 
-            chrononTimeInMs = ADateAndTimeParser.parseDatePart(charAccessor, false);
+            chrononTimeInMs = ADateParserFactory.parseDatePart(charAccessor, false);
 
-            charAccessor.reset(datetime, timeOffset);
+            charAccessor.reset(datetime, timeOffset, datetime.length() - timeOffset);
 
-            chrononTimeInMs += ADateAndTimeParser.parseTimePart(charAccessor);
+            chrononTimeInMs += ATimeParserFactory.parseTimePart(charAccessor);
         } catch (Exception e) {
             throw new HyracksDataException(e);
         }
@@ -90,4 +91,8 @@
 
         datetimeSerde.serialize(aDateTime, out);
     }
+
+    public static long getChronon(byte[] data, int offset) {
+        return AInt64SerializerDeserializer.getLong(data, offset);
+    }
 }
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/serde/ADurationSerializerDeserializer.java b/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/serde/ADurationSerializerDeserializer.java
index c3333f0..88e2ea5 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/serde/ADurationSerializerDeserializer.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/serde/ADurationSerializerDeserializer.java
@@ -7,7 +7,7 @@
 import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
 import edu.uci.ics.asterix.om.base.ADuration;
 import edu.uci.ics.asterix.om.base.AMutableDuration;
-import edu.uci.ics.asterix.om.base.temporal.ADurationParser;
+import edu.uci.ics.asterix.om.base.temporal.ADurationParserFactory;
 import edu.uci.ics.asterix.om.base.temporal.StringCharSequenceAccessor;
 import edu.uci.ics.asterix.om.types.BuiltinType;
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
@@ -48,12 +48,34 @@
         try {
             AMutableDuration aDuration = new AMutableDuration(0, 0);
             StringCharSequenceAccessor charAccessor = new StringCharSequenceAccessor();
-            charAccessor.reset(duration, 0);
-            ADurationParser.parse(charAccessor, aDuration);
+            charAccessor.reset(duration, 0, duration.length());
+            ADurationParserFactory.parseDuration(charAccessor, aDuration);
 
             durationSerde.serialize(aDuration, out);
         } catch (Exception e) {
             throw new HyracksDataException(e);
         }
     }
+
+    /**
+     * Get the year-month field of the duration as an integer number of days.
+     * 
+     * @param data
+     * @param offset
+     * @return
+     */
+    public static int getYearMonth(byte[] data, int offset) {
+        return AInt32SerializerDeserializer.getInt(data, offset);
+    }
+
+    /**
+     * Get the day-time field of the duration as an long integer number of milliseconds.
+     * 
+     * @param data
+     * @param offset
+     * @return
+     */
+    public static long getDayTime(byte[] data, int offset) {
+        return AInt64SerializerDeserializer.getLong(data, offset + 4);
+    }
 }
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/serde/AIntervalSerializerDeserializer.java b/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/serde/AIntervalSerializerDeserializer.java
new file mode 100644
index 0000000..7c87dfa
--- /dev/null
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/serde/AIntervalSerializerDeserializer.java
@@ -0,0 +1,264 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.dataflow.data.nontagged.serde;
+
+import java.io.DataInput;
+import java.io.DataOutput;
+import java.io.IOException;
+
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.AInterval;
+import edu.uci.ics.asterix.om.base.AMutableInterval;
+import edu.uci.ics.asterix.om.base.temporal.ADateParserFactory;
+import edu.uci.ics.asterix.om.base.temporal.ATimeParserFactory;
+import edu.uci.ics.asterix.om.base.temporal.GregorianCalendarSystem;
+import edu.uci.ics.asterix.om.base.temporal.StringCharSequenceAccessor;
+import edu.uci.ics.asterix.om.types.ATypeTag;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+
+public class AIntervalSerializerDeserializer implements ISerializerDeserializer<AInterval> {
+
+    private static final long serialVersionUID = 1L;
+
+    public static final AIntervalSerializerDeserializer INSTANCE = new AIntervalSerializerDeserializer();
+    @SuppressWarnings("unchecked")
+    private static final ISerializerDeserializer<AInterval> intervalSerde = AqlSerializerDeserializerProvider.INSTANCE
+            .getSerializerDeserializer(BuiltinType.AINTERVAL);
+
+    private static final String errorMessage = "This can not be an instance of interval";
+
+    private AIntervalSerializerDeserializer() {
+    }
+
+    @Override
+    public AInterval deserialize(DataInput in) throws HyracksDataException {
+        try {
+            return new AInterval(in.readLong(), in.readLong(), in.readByte());
+        } catch (IOException e) {
+            throw new HyracksDataException(e);
+        }
+
+    }
+
+    @Override
+    public void serialize(AInterval instance, DataOutput out) throws HyracksDataException {
+        try {
+            out.writeLong(instance.getIntervalStart());
+            out.writeLong(instance.getIntervalEnd());
+            out.writeByte(instance.getIntervalType());
+        } catch (IOException e) {
+            throw new HyracksDataException(e);
+        }
+
+    }
+
+    public static long getIntervalStart(byte[] data, int offset) {
+        return AInt64SerializerDeserializer.getLong(data, offset);
+    }
+
+    public static long getIntervalEnd(byte[] data, int offset) {
+        return AInt64SerializerDeserializer.getLong(data, offset + 8);
+    }
+
+    public static byte getIntervalTimeType(byte[] data, int offset) {
+        return data[offset + 8 * 2];
+    }
+
+    /**
+     * create an interval value from two given datetime instance.
+     * 
+     * @param interval
+     * @param out
+     * @throws HyracksDataException
+     */
+    public static void parseDatetime(String interval, DataOutput out) throws HyracksDataException {
+        AMutableInterval aInterval = new AMutableInterval(0l, 0l, (byte) 0);
+
+        long chrononTimeInMsStart = 0;
+        long chrononTimeInMsEnd = 0;
+        try {
+
+            StringCharSequenceAccessor charAccessor = new StringCharSequenceAccessor();
+
+            // Get the index for the comma
+            int commaIndex = interval.indexOf(',');
+            if (commaIndex < 0) {
+                throw new AlgebricksException("comma is missing for a string of interval");
+            }
+
+            int nonSpaceIndex = commaIndex - 1;
+            while (interval.charAt(nonSpaceIndex) == ' ') {
+                nonSpaceIndex--;
+            }
+
+            // Interval Start
+            charAccessor.reset(interval, 0, nonSpaceIndex + 1);
+
+            // +1 if it is negative (-)
+            short timeOffset = (short) ((charAccessor.getCharAt(0) == '-') ? 1 : 0);
+
+            if (charAccessor.getCharAt(timeOffset + 10) != 'T' && charAccessor.getCharAt(timeOffset + 8) != 'T') {
+                throw new AlgebricksException(errorMessage + ": missing T");
+            }
+
+            // if extended form 11, else 9
+            timeOffset += (charAccessor.getCharAt(timeOffset + 13) == ':') ? (short) (11) : (short) (9);
+
+            chrononTimeInMsStart = ADateParserFactory.parseDatePart(charAccessor, false);
+
+            charAccessor.reset(interval, timeOffset, nonSpaceIndex - timeOffset + 1);
+
+            chrononTimeInMsStart += ATimeParserFactory.parseTimePart(charAccessor);
+
+            // Interval End
+            nonSpaceIndex = commaIndex + 1;
+            while (interval.charAt(nonSpaceIndex) == ' ') {
+                nonSpaceIndex++;
+            }
+
+            charAccessor.reset(interval, nonSpaceIndex, interval.length() - nonSpaceIndex);
+
+            // +1 if it is negative (-)
+            timeOffset = (short) ((charAccessor.getCharAt(0) == '-') ? 1 : 0);
+
+            if (charAccessor.getCharAt(timeOffset + 10) != 'T' && charAccessor.getCharAt(timeOffset + 8) != 'T') {
+                throw new AlgebricksException(errorMessage + ": missing T");
+            }
+
+            // if extended form 11, else 9
+            timeOffset += (charAccessor.getCharAt(timeOffset + 13) == ':') ? (short) (11) : (short) (9);
+
+            chrononTimeInMsEnd = ADateParserFactory.parseDatePart(charAccessor, false);
+
+            charAccessor.reset(interval, nonSpaceIndex + timeOffset, interval.length() - nonSpaceIndex - timeOffset);
+
+            chrononTimeInMsEnd += ATimeParserFactory.parseTimePart(charAccessor);
+
+        } catch (Exception e) {
+            throw new HyracksDataException(e);
+        }
+
+        aInterval.setValue(chrononTimeInMsStart, chrononTimeInMsEnd, ATypeTag.DATETIME.serialize());
+
+        intervalSerde.serialize(aInterval, out);
+    }
+
+    public static void parseTime(String interval, DataOutput out) throws HyracksDataException {
+        AMutableInterval aInterval = new AMutableInterval(0l, 0l, (byte) 0);
+
+        long chrononTimeInMsStart = 0;
+        long chrononTimeInMsEnd = 0;
+        try {
+
+            StringCharSequenceAccessor charAccessor = new StringCharSequenceAccessor();
+
+            // Get the index for the comma
+            int commaIndex = interval.indexOf(',');
+            if (commaIndex < 0) {
+                throw new AlgebricksException("comma is missing for a string of interval");
+            }
+
+            int nonSpaceIndex = commaIndex - 1;
+            while (interval.charAt(nonSpaceIndex) == ' ') {
+                nonSpaceIndex--;
+            }
+
+            // Interval Start
+            charAccessor.reset(interval, 0, nonSpaceIndex + 1);
+            chrononTimeInMsStart = ATimeParserFactory.parseTimePart(charAccessor);
+
+            if (chrononTimeInMsStart < 0) {
+                chrononTimeInMsStart += GregorianCalendarSystem.CHRONON_OF_DAY;
+            }
+
+            // Interval End
+            nonSpaceIndex = commaIndex + 1;
+            while (interval.charAt(nonSpaceIndex) == ' ') {
+                nonSpaceIndex++;
+            }
+
+            charAccessor.reset(interval, nonSpaceIndex, interval.length() - nonSpaceIndex);
+            chrononTimeInMsEnd = ATimeParserFactory.parseTimePart(charAccessor);
+
+            if (chrononTimeInMsEnd < 0) {
+                chrononTimeInMsEnd += GregorianCalendarSystem.CHRONON_OF_DAY;
+            }
+
+        } catch (Exception e) {
+            throw new HyracksDataException(e);
+        }
+
+        aInterval.setValue(chrononTimeInMsStart, chrononTimeInMsEnd, ATypeTag.TIME.serialize());
+        intervalSerde.serialize(aInterval, out);
+    }
+
+    public static void parseDate(String interval, DataOutput out) throws HyracksDataException {
+        AMutableInterval aInterval = new AMutableInterval(0l, 0l, (byte) 0);
+
+        long chrononTimeInMsStart = 0;
+        long chrononTimeInMsEnd = 0;
+        short tempStart = 0;
+        short tempEnd = 0;
+        try {
+            StringCharSequenceAccessor charAccessor = new StringCharSequenceAccessor();
+
+            // Get the index for the comma
+            int commaIndex = interval.indexOf(',');
+            if (commaIndex < 0) {
+                throw new AlgebricksException("comma is missing for a string of interval");
+            }
+
+            int nonSpaceIndex = commaIndex - 1;
+            while (interval.charAt(nonSpaceIndex) == ' ') {
+                nonSpaceIndex--;
+            }
+
+            // Interval Start
+            charAccessor.reset(interval, 0, nonSpaceIndex + 1);
+
+            chrononTimeInMsStart = ADateParserFactory.parseDatePart(charAccessor, true);
+
+            if (chrononTimeInMsStart < 0 && chrononTimeInMsStart % GregorianCalendarSystem.CHRONON_OF_DAY != 0) {
+                tempStart = 1;
+            }
+
+            // Interval End
+            nonSpaceIndex = commaIndex + 1;
+            while (interval.charAt(nonSpaceIndex) == ' ') {
+                nonSpaceIndex++;
+            }
+
+            charAccessor.reset(interval, nonSpaceIndex, interval.length() - nonSpaceIndex);
+
+            chrononTimeInMsEnd = ADateParserFactory.parseDatePart(charAccessor, true);
+
+            if (chrononTimeInMsEnd < 0 && chrononTimeInMsEnd % GregorianCalendarSystem.CHRONON_OF_DAY != 0) {
+                tempEnd = 1;
+            }
+
+        } catch (Exception e) {
+            throw new HyracksDataException(e);
+        }
+
+        aInterval.setValue((chrononTimeInMsStart / GregorianCalendarSystem.CHRONON_OF_DAY) - tempStart,
+                (chrononTimeInMsEnd / GregorianCalendarSystem.CHRONON_OF_DAY) - tempEnd, ATypeTag.DATE.serialize());
+
+        intervalSerde.serialize(aInterval, out);
+    }
+
+}
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/serde/AObjectSerializerDeserializer.java b/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/serde/AObjectSerializerDeserializer.java
index 311a6bc..b5b7303 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/serde/AObjectSerializerDeserializer.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/serde/AObjectSerializerDeserializer.java
@@ -15,6 +15,7 @@
 import edu.uci.ics.asterix.om.base.AInt32;
 import edu.uci.ics.asterix.om.base.AInt64;
 import edu.uci.ics.asterix.om.base.AInt8;
+import edu.uci.ics.asterix.om.base.AInterval;
 import edu.uci.ics.asterix.om.base.ALine;
 import edu.uci.ics.asterix.om.base.ANull;
 import edu.uci.ics.asterix.om.base.AOrderedList;
@@ -84,6 +85,9 @@
             case DURATION: {
                 return ADurationSerializerDeserializer.INSTANCE.deserialize(in);
             }
+            case INTERVAL: {
+                return AIntervalSerializerDeserializer.INSTANCE.deserialize(in);
+            }
             case POINT: {
                 return APointSerializerDeserializer.INSTANCE.deserialize(in);
             }
@@ -108,9 +112,9 @@
             case UNORDEREDLIST: {
                 return AUnorderedListSerializerDeserializer.SCHEMALESS_INSTANCE.deserialize(in);
             }
-                // case TYPE: {
-                // return AUnorderedListBytesConverter.INSTANCE.deserialize(in);
-                // }
+            // case TYPE: {
+            // return AUnorderedListBytesConverter.INSTANCE.deserialize(in);
+            // }
             default: {
                 throw new NotImplementedException("No serializer/deserializer implemented for type " + typeTag + " .");
             }
@@ -179,6 +183,10 @@
                 ADurationSerializerDeserializer.INSTANCE.serialize((ADuration) instance, out);
                 break;
             }
+            case INTERVAL: {
+                AIntervalSerializerDeserializer.INSTANCE.serialize((AInterval) instance, out);
+                break;
+            }
             case POINT: {
                 APointSerializerDeserializer.INSTANCE.serialize((APoint) instance, out);
                 break;
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/serde/ATimeSerializerDeserializer.java b/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/serde/ATimeSerializerDeserializer.java
index 8860f2a..26e8d7a 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/serde/ATimeSerializerDeserializer.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/serde/ATimeSerializerDeserializer.java
@@ -7,7 +7,7 @@
 import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
 import edu.uci.ics.asterix.om.base.AMutableTime;
 import edu.uci.ics.asterix.om.base.ATime;
-import edu.uci.ics.asterix.om.base.temporal.ADateAndTimeParser;
+import edu.uci.ics.asterix.om.base.temporal.ATimeParserFactory;
 import edu.uci.ics.asterix.om.base.temporal.StringCharSequenceAccessor;
 import edu.uci.ics.asterix.om.types.BuiltinType;
 import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
@@ -52,8 +52,8 @@
 
         try {
             StringCharSequenceAccessor charAccessor = new StringCharSequenceAccessor();
-            charAccessor.reset(time, 0);
-            chrononTimeInMs = ADateAndTimeParser.parseTimePart(charAccessor);
+            charAccessor.reset(time, 0, time.length());
+            chrononTimeInMs = ATimeParserFactory.parseTimePart(charAccessor);
         } catch (Exception e) {
             throw new HyracksDataException(e);
         }
@@ -63,4 +63,8 @@
         timeSerde.serialize(aTime, out);
     }
 
+    public static int getChronon(byte[] byteArray, int offset) {
+        return AInt32SerializerDeserializer.getInt(byteArray, offset);
+    }
+
 }
\ No newline at end of file
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/formats/nontagged/AqlBinaryComparatorFactoryProvider.java b/asterix-om/src/main/java/edu/uci/ics/asterix/formats/nontagged/AqlBinaryComparatorFactoryProvider.java
index 09c99b8..02f0e47 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/formats/nontagged/AqlBinaryComparatorFactoryProvider.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/formats/nontagged/AqlBinaryComparatorFactoryProvider.java
@@ -2,6 +2,7 @@
 
 import java.io.Serializable;
 
+import edu.uci.ics.asterix.dataflow.data.nontagged.comparators.ADateOrTimeAscBinaryComparatorFactory;
 import edu.uci.ics.asterix.dataflow.data.nontagged.comparators.ADateTimeAscBinaryComparatorFactory;
 import edu.uci.ics.asterix.dataflow.data.nontagged.comparators.AObjectAscBinaryComparatorFactory;
 import edu.uci.ics.asterix.dataflow.data.nontagged.comparators.AObjectDescBinaryComparatorFactory;
@@ -120,7 +121,9 @@
                 return addOffset(RectangleBinaryComparatorFactory.INSTANCE, ascending);
             }
             case DATE:
-            case TIME:
+            case TIME: {
+                return addOffset(ADateOrTimeAscBinaryComparatorFactory.INSTANCE, ascending);
+            }
             case DATETIME: {
                 return addOffset(ADateTimeAscBinaryComparatorFactory.INSTANCE, ascending);
             }
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/formats/nontagged/AqlPrinterFactoryProvider.java b/asterix-om/src/main/java/edu/uci/ics/asterix/formats/nontagged/AqlPrinterFactoryProvider.java
index b576ce0..fe8792f 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/formats/nontagged/AqlPrinterFactoryProvider.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/formats/nontagged/AqlPrinterFactoryProvider.java
@@ -1,6 +1,5 @@
 package edu.uci.ics.asterix.formats.nontagged;
 
-
 import edu.uci.ics.asterix.dataflow.data.nontagged.printers.ABooleanPrinterFactory;
 import edu.uci.ics.asterix.dataflow.data.nontagged.printers.ACirclePrinterFactory;
 import edu.uci.ics.asterix.dataflow.data.nontagged.printers.ADatePrinterFactory;
@@ -12,6 +11,7 @@
 import edu.uci.ics.asterix.dataflow.data.nontagged.printers.AInt32PrinterFactory;
 import edu.uci.ics.asterix.dataflow.data.nontagged.printers.AInt64PrinterFactory;
 import edu.uci.ics.asterix.dataflow.data.nontagged.printers.AInt8PrinterFactory;
+import edu.uci.ics.asterix.dataflow.data.nontagged.printers.AIntervalPrinterFactory;
 import edu.uci.ics.asterix.dataflow.data.nontagged.printers.ALinePrinterFactory;
 import edu.uci.ics.asterix.dataflow.data.nontagged.printers.ANullPrinterFactory;
 import edu.uci.ics.asterix.dataflow.data.nontagged.printers.ANullableFieldPrinterFactory;
@@ -49,8 +49,8 @@
 
         if (aqlType != null) {
             switch (aqlType.getTypeTag()) {
-                // case ANYTYPE:
-                // return AAnyTypePrinterFactory.INSTANCE;
+            // case ANYTYPE:
+            // return AAnyTypePrinterFactory.INSTANCE;
                 case INT8:
                     return AInt8PrinterFactory.INSTANCE;
                 case INT16:
@@ -75,6 +75,8 @@
                     return ADateTimePrinterFactory.INSTANCE;
                 case DURATION:
                     return ADurationPrinterFactory.INSTANCE;
+                case INTERVAL:
+                    return AIntervalPrinterFactory.INSTANCE;
                 case POINT:
                     return APointPrinterFactory.INSTANCE;
                 case POINT3D:
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/formats/nontagged/AqlSerializerDeserializerProvider.java b/asterix-om/src/main/java/edu/uci/ics/asterix/formats/nontagged/AqlSerializerDeserializerProvider.java
index 5492c5c..29e33fd 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/formats/nontagged/AqlSerializerDeserializerProvider.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/formats/nontagged/AqlSerializerDeserializerProvider.java
@@ -16,6 +16,7 @@
 import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AInt32SerializerDeserializer;
 import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AInt64SerializerDeserializer;
 import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AInt8SerializerDeserializer;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AIntervalSerializerDeserializer;
 import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ALineSerializerDeserializer;
 import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ANullSerializerDeserializer;
 import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AObjectSerializerDeserializer;
@@ -111,6 +112,9 @@
             case DURATION: {
                 return ADurationSerializerDeserializer.INSTANCE;
             }
+            case INTERVAL: {
+                return AIntervalSerializerDeserializer.INSTANCE;
+            }
             case ORDEREDLIST: {
                 return new AOrderedListSerializerDeserializer((AOrderedListType) aqlType);
             }
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/formats/nontagged/AqlTypeTraitProvider.java b/asterix-om/src/main/java/edu/uci/ics/asterix/formats/nontagged/AqlTypeTraitProvider.java
index eac6602..a7e8e83 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/formats/nontagged/AqlTypeTraitProvider.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/formats/nontagged/AqlTypeTraitProvider.java
@@ -14,6 +14,7 @@
     private static final ITypeTraits FOURBYTETYPETRAIT = new TypeTrait(4 + 1);
     private static final ITypeTraits EIGHTBYTETYPETRAIT = new TypeTrait(8 + 1);
     private static final ITypeTraits SIXTEENBYTETYPETRAIT = new TypeTrait(16 + 1);
+    private static final ITypeTraits SEVENTEENBYTETYPETRAIT = new TypeTrait(17 + 1);
     private static final ITypeTraits THIRTYTWOBYTETYPETRAIT = new TypeTrait(32 + 1);
     private static final ITypeTraits TWENTYFOURBYTETYPETRAIT = new TypeTrait(24 + 1);
 
@@ -42,6 +43,8 @@
                 return EIGHTBYTETYPETRAIT;
             case POINT:
                 return SIXTEENBYTETYPETRAIT;
+            case INTERVAL:
+                return SEVENTEENBYTETYPETRAIT;
             case POINT3D:
                 return TWENTYFOURBYTETYPETRAIT;
             case LINE:
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/ADate.java b/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/ADate.java
index ea4c33b..097b736 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/ADate.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/ADate.java
@@ -30,7 +30,7 @@
      */
     protected int chrononTimeInDay;
 
-    private static long CHRONON_OF_DAY = 24 * 60 * 60 * 1000;
+    protected static long CHRONON_OF_DAY = 24 * 60 * 60 * 1000;
 
     public ADate(int chrononTimeInDay) {
         this.chrononTimeInDay = chrononTimeInDay;
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/AInterval.java b/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/AInterval.java
new file mode 100644
index 0000000..66a587a
--- /dev/null
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/AInterval.java
@@ -0,0 +1,144 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.om.base;
+
+import edu.uci.ics.asterix.common.exceptions.AsterixException;
+import edu.uci.ics.asterix.om.base.temporal.GregorianCalendarSystem;
+import edu.uci.ics.asterix.om.types.ATypeTag;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.om.types.IAType;
+import edu.uci.ics.asterix.om.visitors.IOMVisitor;
+
+public class AInterval implements IAObject {
+
+    protected long intervalStart;
+    protected long intervalEnd;
+    protected byte typetag;
+
+    public AInterval(long intervalStart, long intervalEnd, byte typetag) {
+        this.intervalStart = intervalStart;
+        this.intervalEnd = intervalEnd;
+        this.typetag = typetag;
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.base.IAObject#getType()
+     */
+    @Override
+    public IAType getType() {
+        return BuiltinType.AINTERVAL;
+    }
+
+    public int compare(Object o) {
+        if (!(o instanceof AInterval)) {
+            return -1;
+        }
+        AInterval d = (AInterval) o;
+        if (d.intervalStart == this.intervalStart && d.intervalEnd == this.intervalEnd && d.typetag == this.typetag) {
+            return 0;
+        } else {
+            return -1;
+        }
+    }
+
+    public boolean equals(Object o) {
+        if (!(o instanceof AInterval)) {
+            return false;
+        } else {
+            AInterval t = (AInterval) o;
+            return (t.intervalStart == this.intervalStart || t.intervalEnd == this.intervalEnd
+                    && t.typetag == this.typetag);
+        }
+    }
+
+    @Override
+    public int hashCode() {
+        return (int) (((int) (this.intervalStart ^ (this.intervalStart >>> 32))) * 31 + (int) (this.intervalEnd ^ (this.intervalEnd >>> 32)))
+                * 31 + (int) this.typetag;
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.base.IAObject#accept(edu.uci.ics.asterix.om.visitors.IOMVisitor)
+     */
+    @Override
+    public void accept(IOMVisitor visitor) throws AsterixException {
+        visitor.visitAInterval(this);
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.base.IAObject#deepEqual(edu.uci.ics.asterix.om.base.IAObject)
+     */
+    @Override
+    public boolean deepEqual(IAObject obj) {
+        return equals(obj);
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.base.IAObject#hash()
+     */
+    @Override
+    public int hash() {
+        return hashCode();
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder sbder = new StringBuilder();
+        sbder.append("AInterval: { ");
+        if (typetag == ATypeTag.DATE.serialize()) {
+            sbder.append("ADate: { ");
+            GregorianCalendarSystem.getInstance().getExtendStringRepWithTimezoneUntilField(
+                    intervalStart * ADate.CHRONON_OF_DAY, 0, sbder, GregorianCalendarSystem.Fields.YEAR,
+                    GregorianCalendarSystem.Fields.DAY);
+            sbder.append(" }, ADate: {");
+            GregorianCalendarSystem.getInstance().getExtendStringRepWithTimezoneUntilField(
+                    intervalEnd * ADate.CHRONON_OF_DAY, 0, sbder, GregorianCalendarSystem.Fields.YEAR,
+                    GregorianCalendarSystem.Fields.DAY);
+            sbder.append(" }");
+        } else if (typetag == ATypeTag.TIME.serialize()) {
+            sbder.append("ATime: { ");
+            GregorianCalendarSystem.getInstance().getExtendStringRepWithTimezoneUntilField(intervalStart, 0, sbder,
+                    GregorianCalendarSystem.Fields.HOUR, GregorianCalendarSystem.Fields.MILLISECOND);
+            sbder.append(" }, ATime: { ");
+
+            GregorianCalendarSystem.getInstance().getExtendStringRepWithTimezoneUntilField(intervalEnd, 0, sbder,
+                    GregorianCalendarSystem.Fields.HOUR, GregorianCalendarSystem.Fields.MILLISECOND);
+            sbder.append(" }");
+        } else if (typetag == ATypeTag.DATETIME.serialize()) {
+            sbder.append("ADateTime: { ");
+            GregorianCalendarSystem.getInstance().getExtendStringRepWithTimezoneUntilField(intervalStart, 0, sbder,
+                    GregorianCalendarSystem.Fields.YEAR, GregorianCalendarSystem.Fields.MILLISECOND);
+            sbder.append(" }, ADateTime: { ");
+            GregorianCalendarSystem.getInstance().getExtendStringRepWithTimezoneUntilField(intervalEnd, 0, sbder,
+                    GregorianCalendarSystem.Fields.YEAR, GregorianCalendarSystem.Fields.MILLISECOND);
+            sbder.append(" }");
+        }
+        sbder.append(" }");
+        return sbder.toString();
+    }
+
+    public long getIntervalStart() {
+        return intervalStart;
+    }
+
+    public long getIntervalEnd() {
+        return intervalEnd;
+    }
+
+    public short getIntervalType() {
+        return typetag;
+    }
+
+}
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/AMutableInterval.java b/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/AMutableInterval.java
new file mode 100644
index 0000000..055535f
--- /dev/null
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/AMutableInterval.java
@@ -0,0 +1,29 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.om.base;
+
+public class AMutableInterval extends AInterval {
+
+    public AMutableInterval(long intervalStart, long intervalEnd, byte typetag) {
+        super(intervalStart, intervalEnd, typetag);
+    }
+
+    public void setValue(long intervalStart, long intervalEnd, byte typetag) {
+        this.intervalStart = intervalStart;
+        this.intervalEnd = intervalEnd;
+        this.typetag = typetag;
+    }
+
+}
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/ADateAndTimeParser.java b/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/ADateAndTimeParser.java
deleted file mode 100644
index 30ee525..0000000
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/ADateAndTimeParser.java
+++ /dev/null
@@ -1,264 +0,0 @@
-/*
- * Copyright 2009-2011 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package edu.uci.ics.asterix.om.base.temporal;
-
-public class ADateAndTimeParser {
-
-    private static final GregorianCalendarSystem gCalInstance = GregorianCalendarSystem.getInstance();
-
-    private static final String dateErrorMessage = "Wrong date format!";
-    private static final String timeErrorMessage = "Wrong time format!";
-
-    /**
-     * Parse the given char sequence as a date string, and return the milliseconds represented by the date.
-     * 
-     * @param charAccessor
-     *            accessor for the char sequence
-     * @param isDateOnly
-     *            indicating whether it is a single date string, or it is the date part of a datetime string
-     * @param errorMessage
-     * @return
-     * @throws Exception
-     */
-    public static <T> long parseDatePart(ICharSequenceAccessor<T> charAccessor, boolean isDateOnly) throws Exception {
-
-        int length = charAccessor.getLength();
-        int offset = 0;
-
-        int year = 0, month = 0, day = 0;
-        boolean positive = true;
-
-        boolean isExtendedForm = false;
-
-        if (charAccessor.getCharAt(offset) == '-') {
-            offset++;
-            positive = false;
-        }
-
-        if ((isDateOnly) && charAccessor.getCharAt(offset + 4) == '-' || (!isDateOnly)
-                && charAccessor.getCharAt(offset + 13) == ':') {
-            isExtendedForm = true;
-        }
-
-        if (isExtendedForm) {
-            if (charAccessor.getCharAt(offset + 4) != '-' || charAccessor.getCharAt(offset + 7) != '-') {
-                throw new Exception(dateErrorMessage);
-            }
-        }
-
-        // year
-        for (int i = 0; i < 4; i++) {
-            if (charAccessor.getCharAt(offset + i) >= '0' && charAccessor.getCharAt(offset + i) <= '9') {
-                year = year * 10 + charAccessor.getCharAt(offset + i) - '0';
-            } else {
-                throw new Exception(dateErrorMessage);
-            }
-        }
-
-        if (year < GregorianCalendarSystem.FIELD_MINS[GregorianCalendarSystem.Fields.YEAR.ordinal()]
-                || year > GregorianCalendarSystem.FIELD_MAXS[GregorianCalendarSystem.Fields.YEAR.ordinal()]) {
-            throw new Exception(dateErrorMessage + ": year " + year);
-        }
-
-        offset += (isExtendedForm) ? 5 : 4;
-
-        // month
-        for (int i = 0; i < 2; i++) {
-            if ((charAccessor.getCharAt(offset + i) >= '0' && charAccessor.getCharAt(offset + i) <= '9')) {
-                month = month * 10 + charAccessor.getCharAt(offset + i) - '0';
-            } else {
-                throw new Exception(dateErrorMessage);
-            }
-        }
-
-        if (month < GregorianCalendarSystem.FIELD_MINS[GregorianCalendarSystem.Fields.MONTH.ordinal()]
-                || month > GregorianCalendarSystem.FIELD_MAXS[GregorianCalendarSystem.Fields.MONTH.ordinal()]) {
-            throw new Exception(dateErrorMessage + ": month " + month);
-        }
-        offset += (isExtendedForm) ? 3 : 2;
-
-        // day
-        for (int i = 0; i < 2; i++) {
-            if ((charAccessor.getCharAt(offset + i) >= '0' && charAccessor.getCharAt(offset + i) <= '9')) {
-                day = day * 10 + charAccessor.getCharAt(offset + i) - '0';
-            } else {
-                throw new Exception(dateErrorMessage);
-            }
-        }
-
-        if (day < GregorianCalendarSystem.FIELD_MINS[GregorianCalendarSystem.Fields.DAY.ordinal()]
-                || day > GregorianCalendarSystem.FIELD_MAXS[GregorianCalendarSystem.Fields.DAY.ordinal()]) {
-            throw new Exception(dateErrorMessage + ": day " + day);
-        }
-
-        offset += 2;
-
-        if (!positive) {
-            year *= -1;
-        }
-
-        if (isDateOnly && length > offset) {
-            throw new Exception(dateErrorMessage);
-        }
-        return gCalInstance.getChronon(year, month, day, 0, 0, 0, 0, 0);
-    }
-
-    /**
-     * Parse the given char sequence as a time string, and return the milliseconds represented by the time.
-     * 
-     * @param charAccessor
-     * @return
-     * @throws Exception
-     */
-    public static <T> int parseTimePart(ICharSequenceAccessor<T> charAccessor) throws Exception {
-
-        int length = charAccessor.getLength();
-        int offset = 0;
-
-        int hour = 0, min = 0, sec = 0, millis = 0;
-        int timezone = 0;
-
-        boolean isExtendedForm = false;
-        if (charAccessor.getCharAt(offset + 2) == ':') {
-            isExtendedForm = true;
-        }
-
-        if (isExtendedForm && (charAccessor.getCharAt(offset + 2) != ':' || charAccessor.getCharAt(offset + 5) != ':')) {
-            throw new Exception(timeErrorMessage);
-        }
-        // hour
-        for (int i = 0; i < 2; i++) {
-            if ((charAccessor.getCharAt(offset + i) >= '0' && charAccessor.getCharAt(offset + i) <= '9')) {
-                hour = hour * 10 + charAccessor.getCharAt(offset + i) - '0';
-            } else {
-                throw new Exception(timeErrorMessage);
-            }
-        }
-
-        if (hour < GregorianCalendarSystem.FIELD_MINS[GregorianCalendarSystem.Fields.HOUR.ordinal()]
-                || hour > GregorianCalendarSystem.FIELD_MAXS[GregorianCalendarSystem.Fields.HOUR.ordinal()]) {
-            throw new Exception(timeErrorMessage + ": hour " + hour);
-        }
-
-        offset += (isExtendedForm) ? 3 : 2;
-
-        // minute
-        for (int i = 0; i < 2; i++) {
-            if ((charAccessor.getCharAt(offset + i) >= '0' && charAccessor.getCharAt(offset + i) <= '9')) {
-                min = min * 10 + charAccessor.getCharAt(offset + i) - '0';
-            } else {
-                throw new Exception(timeErrorMessage);
-            }
-        }
-
-        if (min < GregorianCalendarSystem.FIELD_MINS[GregorianCalendarSystem.Fields.MINUTE.ordinal()]
-                || min > GregorianCalendarSystem.FIELD_MAXS[GregorianCalendarSystem.Fields.MINUTE.ordinal()]) {
-            throw new Exception(timeErrorMessage + ": min " + min);
-        }
-
-        offset += (isExtendedForm) ? 3 : 2;
-
-        // second
-        for (int i = 0; i < 2; i++) {
-            if ((charAccessor.getCharAt(offset + i) >= '0' && charAccessor.getCharAt(offset + i) <= '9')) {
-                sec = sec * 10 + charAccessor.getCharAt(offset + i) - '0';
-            } else {
-                throw new Exception(timeErrorMessage);
-            }
-        }
-
-        if (sec < GregorianCalendarSystem.FIELD_MINS[GregorianCalendarSystem.Fields.SECOND.ordinal()]
-                || sec > GregorianCalendarSystem.FIELD_MAXS[GregorianCalendarSystem.Fields.SECOND.ordinal()]) {
-            throw new Exception(timeErrorMessage + ": sec " + sec);
-        }
-
-        offset += 2;
-
-        if ((isExtendedForm && length > offset && charAccessor.getCharAt(offset) == '.')
-                || (!isExtendedForm && length > offset)) {
-
-            offset += (isExtendedForm) ? 1 : 0;
-            int i = 0;
-            for (; i < 3 && offset + i < length; i++) {
-                if (charAccessor.getCharAt(offset + i) >= '0' && charAccessor.getCharAt(offset + i) <= '9') {
-                    millis = millis * 10 + charAccessor.getCharAt(offset + i) - '0';
-                } else {
-                    break;
-                }
-            }
-
-            offset += i;
-
-            for (; i < 3; i++) {
-                millis = millis * 10;
-            }
-
-            // error is thrown if more than three digits are seen for the millisecond part
-            if (charAccessor.getCharAt(offset) >= '0' && charAccessor.getCharAt(offset) <= '9') {
-                throw new Exception("Wrong format of time instance: too many fields for millisecond.");
-            }
-        }
-
-        if (length > offset) {
-            if (charAccessor.getCharAt(offset) != 'Z') {
-                if ((charAccessor.getCharAt(offset) != '+' && charAccessor.getCharAt(offset) != '-')
-                        || (isExtendedForm && charAccessor.getCharAt(offset + 3) != ':')) {
-                    throw new Exception(timeErrorMessage);
-                }
-
-                short timezoneHour = 0;
-                short timezoneMinute = 0;
-
-                for (int i = 0; i < 2; i++) {
-                    if ((charAccessor.getCharAt(offset + 1 + i) >= '0' && charAccessor.getCharAt(offset + 1 + i) <= '9')) {
-                        timezoneHour = (short) (timezoneHour * 10 + charAccessor.getCharAt(offset + 1 + i) - '0');
-                    } else {
-                        throw new Exception(timeErrorMessage);
-                    }
-                }
-
-                if (timezoneHour < GregorianCalendarSystem.TIMEZONE_HOUR_MIN
-                        || timezoneHour > GregorianCalendarSystem.TIMEZONE_HOUR_MAX) {
-                    throw new Exception(timeErrorMessage + ": time zone hour " + timezoneHour);
-                }
-
-                int temp_offset = (isExtendedForm) ? 1 : 0;
-
-                for (int i = 0; i < 2; i++) {
-                    if ((charAccessor.getCharAt(offset + temp_offset + 3 + i) >= '0' && charAccessor.getCharAt(offset
-                            + temp_offset + 3 + i) <= '9')) {
-                        timezoneMinute = (short) (timezoneMinute * 10
-                                + charAccessor.getCharAt(offset + temp_offset + 3 + i) - '0');
-                    } else {
-                        throw new Exception(timeErrorMessage);
-                    }
-                }
-
-                if (timezoneMinute < GregorianCalendarSystem.TIMEZONE_MIN_MIN
-                        || timezoneMinute > GregorianCalendarSystem.TIMEZONE_MIN_MAX) {
-                    throw new Exception(timeErrorMessage + ": time zone minute " + timezoneMinute);
-                }
-
-                if (charAccessor.getCharAt(offset) == '-') {
-                    timezone = (byte) -((timezoneHour * 4) + timezoneMinute / 15);
-                } else {
-                    timezone = (byte) ((timezoneHour * 4) + timezoneMinute / 15);
-                }
-            }
-        }
-
-        return gCalInstance.getChronon(hour, min, sec, millis, timezone);
-    }
-}
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/ADateParserFactory.java b/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/ADateParserFactory.java
new file mode 100644
index 0000000..8192919
--- /dev/null
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/ADateParserFactory.java
@@ -0,0 +1,150 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.om.base.temporal;
+
+import java.io.DataOutput;
+import java.io.IOException;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.parsers.IValueParser;
+import edu.uci.ics.hyracks.dataflow.common.data.parsers.IValueParserFactory;
+
+public class ADateParserFactory implements IValueParserFactory {
+
+    public static final IValueParserFactory INSTANCE = new ADateParserFactory();
+
+    private static final long serialVersionUID = 1L;
+
+    private static final String dateErrorMessage = "Wrong input format for a date value";
+
+    private ADateParserFactory() {
+
+    }
+
+    @Override
+    public IValueParser createValueParser() {
+
+        final CharArrayCharSequenceAccessor charArrayAccessor = new CharArrayCharSequenceAccessor();
+
+        return new IValueParser() {
+
+            @Override
+            public void parse(char[] buffer, int start, int length, DataOutput out) throws HyracksDataException {
+                charArrayAccessor.reset(buffer, start, length);
+                try {
+                    out.writeInt((int) (parseDatePart(charArrayAccessor, true) / GregorianCalendarSystem.CHRONON_OF_DAY));
+                } catch (IOException ex) {
+                    throw new HyracksDataException(ex);
+                }
+            }
+        };
+    }
+
+    /**
+     * Parse the given char sequence as a date string, and return the milliseconds represented by the date.
+     * 
+     * @param charAccessor
+     *            accessor for the char sequence
+     * @param isDateOnly
+     *            indicating whether it is a single date string, or it is the date part of a datetime string
+     * @param errorMessage
+     * @return
+     * @throws Exception
+     */
+    public static <T> long parseDatePart(ICharSequenceAccessor<T> charAccessor, boolean isDateOnly)
+            throws HyracksDataException {
+
+        int length = charAccessor.getLength();
+        int offset = 0;
+
+        int year = 0, month = 0, day = 0;
+        boolean positive = true;
+
+        boolean isExtendedForm = false;
+
+        if (charAccessor.getCharAt(offset) == '-') {
+            offset++;
+            positive = false;
+        }
+
+        if ((isDateOnly) && charAccessor.getCharAt(offset + 4) == '-' || (!isDateOnly)
+                && charAccessor.getCharAt(offset + 13) == ':') {
+            isExtendedForm = true;
+        }
+
+        if (isExtendedForm) {
+            if (charAccessor.getCharAt(offset + 4) != '-' || charAccessor.getCharAt(offset + 7) != '-') {
+                throw new HyracksDataException("Missing dash in the date string as an extended form");
+            }
+        }
+
+        // year
+        for (int i = 0; i < 4; i++) {
+            if (charAccessor.getCharAt(offset + i) >= '0' && charAccessor.getCharAt(offset + i) <= '9') {
+                year = year * 10 + charAccessor.getCharAt(offset + i) - '0';
+            } else {
+                throw new HyracksDataException("Non-numeric value in year field");
+            }
+        }
+
+        if (year < GregorianCalendarSystem.FIELD_MINS[GregorianCalendarSystem.Fields.YEAR.ordinal()]
+                || year > GregorianCalendarSystem.FIELD_MAXS[GregorianCalendarSystem.Fields.YEAR.ordinal()]) {
+            throw new HyracksDataException(dateErrorMessage + ": year " + year);
+        }
+
+        offset += (isExtendedForm) ? 5 : 4;
+
+        // month
+        for (int i = 0; i < 2; i++) {
+            if ((charAccessor.getCharAt(offset + i) >= '0' && charAccessor.getCharAt(offset + i) <= '9')) {
+                month = month * 10 + charAccessor.getCharAt(offset + i) - '0';
+            } else {
+                throw new HyracksDataException("Non-numeric value in month field");
+            }
+        }
+
+        if (month < GregorianCalendarSystem.FIELD_MINS[GregorianCalendarSystem.Fields.MONTH.ordinal()]
+                || month > GregorianCalendarSystem.FIELD_MAXS[GregorianCalendarSystem.Fields.MONTH.ordinal()]) {
+            throw new HyracksDataException(dateErrorMessage + ": month " + month);
+        }
+        offset += (isExtendedForm) ? 3 : 2;
+
+        // day
+        for (int i = 0; i < 2; i++) {
+            if ((charAccessor.getCharAt(offset + i) >= '0' && charAccessor.getCharAt(offset + i) <= '9')) {
+                day = day * 10 + charAccessor.getCharAt(offset + i) - '0';
+            } else {
+                throw new HyracksDataException("Non-numeric value in day field");
+            }
+        }
+
+        if (day < GregorianCalendarSystem.FIELD_MINS[GregorianCalendarSystem.Fields.DAY.ordinal()]
+                || day > GregorianCalendarSystem.FIELD_MAXS[GregorianCalendarSystem.Fields.DAY.ordinal()]) {
+            throw new HyracksDataException(dateErrorMessage + ": day " + day);
+        }
+
+        offset += 2;
+
+        if (!positive) {
+            year *= -1;
+        }
+
+        if (isDateOnly && length > offset) {
+            throw new HyracksDataException("Too many chars for a date only value");
+        }
+        return GregorianCalendarSystem.getInstance().getChronon(year, month, day, 0, 0, 0, 0, 0);
+    }
+
+}
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/ADateTimeParserFactory.java b/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/ADateTimeParserFactory.java
new file mode 100644
index 0000000..2df3c3b
--- /dev/null
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/ADateTimeParserFactory.java
@@ -0,0 +1,74 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.om.base.temporal;
+
+import java.io.DataOutput;
+import java.io.IOException;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.parsers.IValueParser;
+import edu.uci.ics.hyracks.dataflow.common.data.parsers.IValueParserFactory;
+
+public class ADateTimeParserFactory implements IValueParserFactory {
+
+    public static final IValueParserFactory INSTANCE = new ADateTimeParserFactory();
+
+    private static final long serialVersionUID = 1L;
+
+    private static final String dateTimeErrorMessage = "Wrong Input Format for a DateTime Value";
+
+    private ADateTimeParserFactory() {
+
+    }
+
+    @Override
+    public IValueParser createValueParser() {
+
+        final CharArrayCharSequenceAccessor charArrayAccessor = new CharArrayCharSequenceAccessor();
+
+        return new IValueParser() {
+
+            @Override
+            public void parse(char[] buffer, int start, int length, DataOutput out) throws HyracksDataException {
+                long chrononTimeInMs = 0;
+
+                charArrayAccessor.reset(buffer, start, length);
+
+                short timeOffset = (short) ((charArrayAccessor.getCharAt(0) == '-') ? 1 : 0);
+
+                if (charArrayAccessor.getCharAt(timeOffset + 10) != 'T'
+                        && charArrayAccessor.getCharAt(timeOffset + 8) != 'T') {
+                    throw new HyracksDataException(dateTimeErrorMessage + ": missing T");
+                }
+
+                // if extended form 11, else 9
+                timeOffset += (charArrayAccessor.getCharAt(timeOffset + 13) == ':') ? (short) (11) : (short) (9);
+
+                chrononTimeInMs = ADateParserFactory.parseDatePart(charArrayAccessor, false);
+
+                charArrayAccessor.reset(buffer, start + timeOffset, length - timeOffset);
+
+                chrononTimeInMs += ATimeParserFactory.parseTimePart(charArrayAccessor);
+
+                try {
+                    out.writeLong(chrononTimeInMs);
+                } catch (IOException ex) {
+                    throw new HyracksDataException(ex);
+                }
+            }
+        };
+    }
+
+}
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/ADurationParser.java b/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/ADurationParserFactory.java
similarity index 62%
rename from asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/ADurationParser.java
rename to asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/ADurationParserFactory.java
index 5d43bba..b176061 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/ADurationParser.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/ADurationParserFactory.java
@@ -14,9 +14,45 @@
  */
 package edu.uci.ics.asterix.om.base.temporal;
 
-import edu.uci.ics.asterix.om.base.AMutableDuration;
+import java.io.DataOutput;
+import java.io.IOException;
 
-public class ADurationParser {
+import edu.uci.ics.asterix.om.base.AMutableDuration;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.parsers.IValueParser;
+import edu.uci.ics.hyracks.dataflow.common.data.parsers.IValueParserFactory;
+
+public class ADurationParserFactory implements IValueParserFactory {
+
+    public static final IValueParserFactory INSTANCE = new ADurationParserFactory();
+
+    private static final long serialVersionUID = 1L;
+
+    private static final String durationErrorMessage = "Wrong Input Format for a Duration Value";
+
+    private ADurationParserFactory() {
+
+    }
+
+    @Override
+    public IValueParser createValueParser() {
+        final CharArrayCharSequenceAccessor charArrayAccessor = new CharArrayCharSequenceAccessor();
+        final AMutableDuration aMutableDuration = new AMutableDuration(0, 0);
+        return new IValueParser() {
+
+            @Override
+            public void parse(char[] buffer, int start, int length, DataOutput out) throws HyracksDataException {
+                charArrayAccessor.reset(buffer, start, length);
+                parseDuration(charArrayAccessor, aMutableDuration);
+                try {
+                    out.writeInt(aMutableDuration.getMonths());
+                    out.writeLong(aMutableDuration.getMilliseconds());
+                } catch (IOException ex) {
+                    throw new HyracksDataException(ex);
+                }
+            }
+        };
+    }
 
     private enum State {
         NOTHING_READ,
@@ -30,9 +66,8 @@
         SEC;
     };
 
-    private static final String errorMessage = "This can not be an instance of duration";
-
-    public static <T> void parse(ICharSequenceAccessor<T> charAccessor, AMutableDuration aDuration) throws Exception {
+    public static <T> void parseDuration(ICharSequenceAccessor<T> charAccessor, AMutableDuration aDuration)
+            throws HyracksDataException {
 
         boolean positive = true;
         int offset = 0;
@@ -45,7 +80,7 @@
         }
 
         if (charAccessor.getCharAt(offset++) != 'P') {
-            throw new Exception(errorMessage);
+            throw new HyracksDataException(durationErrorMessage + ": Missing leading 'P'.");
         }
 
         for (; offset < charAccessor.getLength(); offset++) {
@@ -59,7 +94,7 @@
                             year = value;
                             state = State.YEAR;
                         } else {
-                            throw new Exception(errorMessage);
+                            throw new HyracksDataException(durationErrorMessage + ": wrong YEAR feild.");
                         }
                         break;
                     case 'M':
@@ -68,13 +103,13 @@
                                 month = value;
                                 state = State.MONTH;
                             } else {
-                                throw new Exception(errorMessage);
+                                throw new HyracksDataException(durationErrorMessage + ": wrong MONTH field.");
                             }
                         } else if (state.compareTo(State.MIN) < 0) {
                             minute = value;
                             state = State.MIN;
                         } else {
-                            throw new Exception(errorMessage);
+                            throw new HyracksDataException(durationErrorMessage + ": wrong MIN field.");
                         }
                         break;
                     case 'D':
@@ -82,14 +117,14 @@
                             day = value;
                             state = State.DAY;
                         } else {
-                            throw new Exception(errorMessage);
+                            throw new HyracksDataException(durationErrorMessage + ": wrong DAY field");
                         }
                         break;
                     case 'T':
                         if (state.compareTo(State.TIME) < 0) {
                             state = State.TIME;
                         } else {
-                            throw new Exception(errorMessage);
+                            throw new HyracksDataException(durationErrorMessage + ": wrong TIME field.");
                         }
                         break;
 
@@ -98,7 +133,7 @@
                             hour = value;
                             state = State.HOUR;
                         } else {
-                            throw new Exception(errorMessage);
+                            throw new HyracksDataException(durationErrorMessage + ": wrong HOUR field.");
                         }
                         break;
                     case '.':
@@ -110,7 +145,8 @@
                                     if (i < 4) {
                                         millisecond = millisecond * 10 + (charAccessor.getCharAt(offset + i) - '0');
                                     } else {
-                                        throw new Exception(errorMessage);
+                                        throw new HyracksDataException(durationErrorMessage
+                                                + ": wrong MILLISECOND field.");
                                     }
                                 } else {
                                     break;
@@ -119,18 +155,18 @@
                             offset += i;
                             state = State.MILLISEC;
                         } else {
-                            throw new Exception(errorMessage);
+                            throw new HyracksDataException(durationErrorMessage + ": wrong MILLISECOND field.");
                         }
                     case 'S':
                         if (state.compareTo(State.SEC) < 0) {
                             second = value;
                             state = State.SEC;
                         } else {
-                            throw new Exception(errorMessage);
+                            throw new HyracksDataException(durationErrorMessage + ": wrong SECOND field.");
                         }
                         break;
                     default:
-                        throw new Exception(errorMessage);
+                        throw new HyracksDataException(durationErrorMessage + ": wrong format for duration.");
 
                 }
                 value = 0;
@@ -138,7 +174,7 @@
         }
 
         if (state.compareTo(State.TIME) == 0) {
-            throw new Exception(errorMessage);
+            throw new HyracksDataException(durationErrorMessage + ": no time fields after time separator.");
         }
 
         short temp = 1;
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/ATimeParserFactory.java b/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/ATimeParserFactory.java
new file mode 100644
index 0000000..d76f41d
--- /dev/null
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/ATimeParserFactory.java
@@ -0,0 +1,217 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.om.base.temporal;
+
+import java.io.DataOutput;
+import java.io.IOException;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.dataflow.common.data.parsers.IValueParser;
+import edu.uci.ics.hyracks.dataflow.common.data.parsers.IValueParserFactory;
+
+public class ATimeParserFactory implements IValueParserFactory {
+
+    public static final IValueParserFactory INSTANCE = new ATimeParserFactory();
+
+    private static final long serialVersionUID = 1L;
+
+    private static final String timeErrorMessage = "Wrong Input Format for a Time Value";
+
+    private ATimeParserFactory() {
+
+    }
+
+    @Override
+    public IValueParser createValueParser() {
+
+        final CharArrayCharSequenceAccessor charArrayAccessor = new CharArrayCharSequenceAccessor();
+
+        return new IValueParser() {
+
+            @Override
+            public void parse(char[] buffer, int start, int length, DataOutput out) throws HyracksDataException {
+                charArrayAccessor.reset(buffer, start, length);
+                try {
+                    out.writeInt(parseTimePart(charArrayAccessor));
+                } catch (IOException ex) {
+                    throw new HyracksDataException(ex);
+                }
+            }
+        };
+    }
+
+    /**
+     * Parse the given char sequence as a time string, and return the milliseconds represented by the time.
+     * 
+     * @param charAccessor
+     * @return
+     * @throws Exception
+     */
+    public static <T> int parseTimePart(ICharSequenceAccessor<T> charAccessor) throws HyracksDataException {
+
+        int length = charAccessor.getLength();
+        int offset = 0;
+
+        int hour = 0, min = 0, sec = 0, millis = 0;
+        int timezone = 0;
+
+        boolean isExtendedForm = false;
+        if (charAccessor.getCharAt(offset + 2) == ':') {
+            isExtendedForm = true;
+        }
+
+        if (isExtendedForm && (charAccessor.getCharAt(offset + 2) != ':' || charAccessor.getCharAt(offset + 5) != ':')) {
+            throw new HyracksDataException(timeErrorMessage + ": Missing colon in an extended time format.");
+        }
+        // hour
+        for (int i = 0; i < 2; i++) {
+            if ((charAccessor.getCharAt(offset + i) >= '0' && charAccessor.getCharAt(offset + i) <= '9')) {
+                hour = hour * 10 + charAccessor.getCharAt(offset + i) - '0';
+            } else {
+                throw new HyracksDataException(timeErrorMessage + ": Non-numeric value in hour field");
+            }
+        }
+
+        if (hour < GregorianCalendarSystem.FIELD_MINS[GregorianCalendarSystem.Fields.HOUR.ordinal()]
+                || hour > GregorianCalendarSystem.FIELD_MAXS[GregorianCalendarSystem.Fields.HOUR.ordinal()]) {
+            throw new HyracksDataException(timeErrorMessage + ": hour " + hour);
+        }
+
+        offset += (isExtendedForm) ? 3 : 2;
+
+        // minute
+        for (int i = 0; i < 2; i++) {
+            if ((charAccessor.getCharAt(offset + i) >= '0' && charAccessor.getCharAt(offset + i) <= '9')) {
+                min = min * 10 + charAccessor.getCharAt(offset + i) - '0';
+            } else {
+                throw new HyracksDataException(timeErrorMessage + ": Non-numeric value in minute field");
+            }
+        }
+
+        if (min < GregorianCalendarSystem.FIELD_MINS[GregorianCalendarSystem.Fields.MINUTE.ordinal()]
+                || min > GregorianCalendarSystem.FIELD_MAXS[GregorianCalendarSystem.Fields.MINUTE.ordinal()]) {
+            throw new HyracksDataException(timeErrorMessage + ": min " + min);
+        }
+
+        offset += (isExtendedForm) ? 3 : 2;
+
+        // second
+        for (int i = 0; i < 2; i++) {
+            if ((charAccessor.getCharAt(offset + i) >= '0' && charAccessor.getCharAt(offset + i) <= '9')) {
+                sec = sec * 10 + charAccessor.getCharAt(offset + i) - '0';
+            } else {
+                throw new HyracksDataException(timeErrorMessage + ": Non-numeric value in second field");
+            }
+        }
+
+        if (sec < GregorianCalendarSystem.FIELD_MINS[GregorianCalendarSystem.Fields.SECOND.ordinal()]
+                || sec > GregorianCalendarSystem.FIELD_MAXS[GregorianCalendarSystem.Fields.SECOND.ordinal()]) {
+            throw new HyracksDataException(timeErrorMessage + ": sec " + sec);
+        }
+
+        offset += 2;
+
+        if ((isExtendedForm && length > offset && charAccessor.getCharAt(offset) == '.')
+                || (!isExtendedForm && length > offset)) {
+
+            offset += (isExtendedForm) ? 1 : 0;
+            int i = 0;
+            for (; i < 3 && offset + i < length; i++) {
+                if (charAccessor.getCharAt(offset + i) >= '0' && charAccessor.getCharAt(offset + i) <= '9') {
+                    millis = millis * 10 + charAccessor.getCharAt(offset + i) - '0';
+                } else {
+                    break;
+                }
+            }
+
+            offset += i;
+
+            for (; i < 3; i++) {
+                millis = millis * 10;
+            }
+
+            // error is thrown if more than three digits are seen for the millisecond part
+            if (charAccessor.getLength() > offset && charAccessor.getCharAt(offset) >= '0'
+                    && charAccessor.getCharAt(offset) <= '9') {
+                throw new HyracksDataException(timeErrorMessage + ": too many fields for millisecond.");
+            }
+        }
+
+        if (length > offset) {
+            timezone = parseTimezonePart(charAccessor, offset);
+        }
+
+        return GregorianCalendarSystem.getInstance().getChronon(hour, min, sec, millis, timezone);
+    }
+
+    /**
+     * Parse the given char sequence as a time string, and return the milliseconds represented by the time.
+     * 
+     * @param charAccessor
+     * @return
+     * @throws Exception
+     */
+    public static <T> int parseTimezonePart(ICharSequenceAccessor<T> charAccessor, int offset)
+            throws HyracksDataException {
+        int timezone = 0;
+
+        if (charAccessor.getCharAt(offset) != 'Z') {
+            if ((charAccessor.getCharAt(offset) != '+' && charAccessor.getCharAt(offset) != '-')) {
+                throw new HyracksDataException("Wrong timezone format: missing sign or missing colon for a time zone");
+            }
+
+            short timezoneHour = 0;
+            short timezoneMinute = 0;
+
+            for (int i = 0; i < 2; i++) {
+                if ((charAccessor.getCharAt(offset + 1 + i) >= '0' && charAccessor.getCharAt(offset + 1 + i) <= '9')) {
+                    timezoneHour = (short) (timezoneHour * 10 + charAccessor.getCharAt(offset + 1 + i) - '0');
+                } else {
+                    throw new HyracksDataException(timeErrorMessage + ": Non-numeric value in timezone hour field");
+                }
+            }
+
+            if (timezoneHour < GregorianCalendarSystem.TIMEZONE_HOUR_MIN
+                    || timezoneHour > GregorianCalendarSystem.TIMEZONE_HOUR_MAX) {
+                throw new HyracksDataException(timeErrorMessage + ": time zone hour " + timezoneHour);
+            }
+
+            int temp_offset = (charAccessor.getCharAt(offset + 3) == ':') ? 1 : 0;
+
+            for (int i = 0; i < 2; i++) {
+                if ((charAccessor.getCharAt(offset + temp_offset + 3 + i) >= '0' && charAccessor.getCharAt(offset
+                        + temp_offset + 3 + i) <= '9')) {
+                    timezoneMinute = (short) (timezoneMinute * 10
+                            + charAccessor.getCharAt(offset + temp_offset + 3 + i) - '0');
+                } else {
+                    throw new HyracksDataException(timeErrorMessage + ": Non-numeric value in timezone minute field");
+                }
+            }
+
+            if (timezoneMinute < GregorianCalendarSystem.TIMEZONE_MIN_MIN
+                    || timezoneMinute > GregorianCalendarSystem.TIMEZONE_MIN_MAX) {
+                throw new HyracksDataException(timeErrorMessage + ": time zone minute " + timezoneMinute);
+            }
+
+            if (charAccessor.getCharAt(offset) == '-') {
+                timezone = (byte) -((timezoneHour * 4) + timezoneMinute / 15);
+            } else {
+                timezone = (byte) ((timezoneHour * 4) + timezoneMinute / 15);
+            }
+        }
+        return timezone;
+    }
+
+}
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/ByteArrayCharSequenceAccessor.java b/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/ByteArrayCharSequenceAccessor.java
index e1a2135..453c86f 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/ByteArrayCharSequenceAccessor.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/ByteArrayCharSequenceAccessor.java
@@ -14,27 +14,41 @@
  */
 package edu.uci.ics.asterix.om.base.temporal;
 
+import edu.uci.ics.asterix.common.exceptions.AsterixRuntimeException;
+
 public class ByteArrayCharSequenceAccessor implements ICharSequenceAccessor<Byte[]> {
 
-    private byte[] string;
+    private byte[] buf;
     private int offset;
-    private int beginOffset;
+    private int length;
 
     @Override
-    public char getCharAt(int index) {
-        return (char) (string[index + offset + beginOffset]);
+    public char getCharAt(int index) throws AsterixRuntimeException {
+        if (index < 0 || index >= length) {
+            throw new AsterixRuntimeException("Byte array char accessor is out of bound: " + index + ":" + length);
+        }
+        return (char) (buf[index + offset]);
     }
 
-    /* The offset is the position of the first letter in the byte array */
-    public void reset(byte[] obj, int beginOffset, int offset) {
-        string = obj;
+    /**
+     * Reset the wrapped byte array.
+     * 
+     * @param obj
+     *            The byte array to be wrapped
+     * @param beginOffset
+     *            The offset of the string stored in the byte array.
+     * @param offset
+     *            The offset of the substring of the string stored (offset from the beginOffset).
+     */
+    public void reset(byte[] obj, int offset, int length) {
+        this.buf = obj;
         this.offset = offset;
-        this.beginOffset = beginOffset;
+        this.length = length;
     }
 
     @Override
     public int getLength() {
-        return ((string[beginOffset - 2] & 0xff) << 8) + ((string[beginOffset - 1] & 0xff) << 0) - offset;
+        return length;
     }
 
 }
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/CharArrayCharSequenceAccessor.java b/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/CharArrayCharSequenceAccessor.java
new file mode 100644
index 0000000..404f0ee
--- /dev/null
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/CharArrayCharSequenceAccessor.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.om.base.temporal;
+
+import edu.uci.ics.asterix.common.exceptions.AsterixRuntimeException;
+
+public class CharArrayCharSequenceAccessor implements ICharSequenceAccessor<char[]> {
+
+    private char[] buf;
+    private int offset;
+    private int length;
+    
+    @Override
+    public char getCharAt(int index) throws AsterixRuntimeException {
+        if (index < 0 || index >= length) {
+            throw new AsterixRuntimeException("Byte array char accessor is out of bound: " + index + ":" + length);
+        }
+        return (char) (buf[index + offset]);
+    }
+
+    /**
+     * Reset the wrapped byte array.
+     * 
+     * @param obj
+     *            The byte array to be wrapped
+     * @param beginOffset
+     *            The offset of the string stored in the byte array.
+     * @param offset
+     *            The offset of the substring of the string stored (offset from the beginOffset).
+     */
+    public void reset(char[] obj, int offset, int length) {
+        this.buf = obj;
+        this.offset = offset;
+        this.length = length;
+    }
+
+    @Override
+    public int getLength() {
+        return length;
+ }
+
+}
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/DurationArithmeticOperations.java b/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/DurationArithmeticOperations.java
new file mode 100644
index 0000000..9d6bc2f
--- /dev/null
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/DurationArithmeticOperations.java
@@ -0,0 +1,87 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.om.base.temporal;
+
+/**
+ * Algorithms for duration related arithmetic operations.
+ */
+public class DurationArithmeticOperations {
+
+    private final static GregorianCalendarSystem calSystem = GregorianCalendarSystem.getInstance();
+
+    /**
+     * Add a duration (with yearMonth and dayTime) onto a time point. The algorithm works as described in
+     * <a
+     * href="http://www.w3.org/TR/xmlschema-2/#adding-durations-to-dateTimes">"XML: adding durations to dateTimes"</a>.
+     * <p/>
+     * The basic algorithm is like this: duration is applied to the time point as two separated fields: year-month field
+     * and day-time field. Year-month field is applied firstly by reserving the correct day within the month's range
+     * (for example add 1M to 03-31 will return 04-30). Then day-time field is applied.
+     * <p/>
+     * 
+     * @param pointChronon
+     * @param yearMonthDuration
+     * @param dayTimeDuration
+     * @return
+     */
+    public static long addDuration(long pointChronon, int yearMonthDuration, long dayTimeDuration) {
+
+        int year = calSystem.getYear(pointChronon);
+        int month = calSystem.getMonthOfYear(pointChronon, year);
+        int day = calSystem.getDayOfMonthYear(pointChronon, year, month);
+        int hour = calSystem.getHourOfDay(pointChronon);
+        int min = calSystem.getMinOfHour(pointChronon);
+        int sec = calSystem.getSecOfMin(pointChronon);
+        int ms = calSystem.getMillisOfSec(pointChronon);
+
+        // Apply the year-month duration
+        int carry = yearMonthDuration / 12;
+        month += (yearMonthDuration % 12);
+
+        if (month < 0) {
+            month += 12;
+            carry -= 1;
+        } else if (month > 12) {
+            month -= 12;
+            carry += 1;
+        }
+
+        year += carry;
+
+        boolean isLeapYear = calSystem.isLeapYear(year);
+
+        if (isLeapYear) {
+            if (day > GregorianCalendarSystem.DAYS_OF_MONTH_ORDI[month - 1]) {
+                day = GregorianCalendarSystem.DAYS_OF_MONTH_ORDI[month - 1];
+            }
+        } else {
+            if (day > GregorianCalendarSystem.DAYS_OF_MONTH_LEAP[month - 1]) {
+                day = GregorianCalendarSystem.DAYS_OF_MONTH_LEAP[month - 1];
+            }
+        }
+
+        return calSystem.getChronon(year, month, day, hour, min, sec, ms, 0) + dayTimeDuration;
+    }
+
+    public static int addDuration(int pointChronon, long dayTimeDuration) {
+        int rtnChronon = (int) ((pointChronon + dayTimeDuration) % GregorianCalendarSystem.CHRONON_OF_DAY);
+        if (rtnChronon < 0) {
+            rtnChronon += GregorianCalendarSystem.CHRONON_OF_DAY;
+        }
+
+        return rtnChronon;
+    }
+
+}
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/GregorianCalendarSystem.java b/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/GregorianCalendarSystem.java
index 149a1d2..d43f235 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/GregorianCalendarSystem.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/GregorianCalendarSystem.java
@@ -57,6 +57,7 @@
     public static final int CHRONON_OF_MINUTE = 60 * CHRONON_OF_SECOND;
     public static final int CHRONON_OF_HOUR = 60 * CHRONON_OF_MINUTE;
     public static final long CHRONON_OF_DAY = 24 * CHRONON_OF_HOUR;
+    public static final int MONTHS_IN_A_YEAR = 12;
 
     /**
      * Minimum feasible value of each field
@@ -238,8 +239,25 @@
         return chrononTime;
     }
 
+    public long adjustChrononByTimezone(long chronon, int timezone) {
+        return chronon + timezone / 4 * CHRONON_OF_HOUR + (timezone % 4) * 15 * CHRONON_OF_MINUTE;
+    }
+
+    public static int getChrononInDays(long chronon) {
+        if (chronon >= 0) {
+            return (int) (chronon / CHRONON_OF_DAY);
+        } else {
+            if (chronon % CHRONON_OF_DAY != 0) {
+                return (int) (chronon / CHRONON_OF_DAY - 1);
+            } else {
+                return (int) (chronon / CHRONON_OF_DAY);
+            }
+        }
+    }
+
     /**
-     * Get the extended string representation of the given UTC chronon time under the given time zone. Only fields before
+     * Get the extended string representation of the given UTC chronon time under the given time zone. Only fields
+     * before
      * the given field index will be returned.
      * <p/>
      * The extended string representation is like:<br/>
@@ -258,6 +276,7 @@
 
         switch (startField) {
             case YEAR:
+            default:
                 sbder.append(String.format(year < 0 ? "%05d" : "%04d", year));
                 if (untilField == Fields.YEAR) {
                     return;
@@ -304,10 +323,13 @@
                 break;
         }
 
-        if (untilField.compareTo(Fields.DAY) > 0) {
+        if (timezone == 0) {
             sbder.append("Z");
         } else {
             short tzMin = (short) ((timezone % 4) * 15);
+            if (tzMin < 0) {
+                tzMin = (short) (-1 * tzMin);
+            }
             short tzHr = (short) (timezone / 4);
             sbder.append((tzHr >= 0 ? "+" : "-")).append(String.format("%02d", (tzHr < 0 ? -tzHr : tzHr))).append(":")
                     .append(String.format("%02d", tzMin));
@@ -328,6 +350,7 @@
 
         switch (startField) {
             case YEAR:
+            default:
                 sbder.append(String.format(year < 0 ? "%05d" : "%04d", year));
                 if (untilField == Fields.YEAR) {
                     return;
@@ -359,10 +382,13 @@
                 break;
         }
 
-        if (untilField.compareTo(Fields.DAY) > 0) {
+        if (timezone == 0) {
             sbder.append("Z");
         } else {
             short tzMin = (short) ((timezone % 4) * 15);
+            if (tzMin < 0) {
+                tzMin = (short) (-1 * tzMin);
+            }
             short tzHr = (short) (timezone / 4);
             sbder.append((tzHr >= 0 ? "+" : "-")).append(String.format("%02d", (tzHr < 0 ? -tzHr : tzHr)))
                     .append(String.format("%02d", tzMin));
@@ -422,7 +448,7 @@
      * @param year
      * @return
      */
-    protected boolean isLeapYear(int year) {
+    public boolean isLeapYear(int year) {
         return ((year & 3) == 0) && ((year % 100) != 0 || (year % 400) == 0);
     }
 
@@ -454,7 +480,8 @@
      * Get the year for the given chronon time.
      * <p/>
      * This code is directly from the Joda library BadicChronology.java.<br/>
-     * The original authers are Stephen Colebourne, Brain S O'Neill and Guy Allard, and modified by JArod Wen on May 7th, 2012.
+     * The original authers are Stephen Colebourne, Brain S O'Neill and Guy Allard, and modified by JArod Wen on May
+     * 7th, 2012.
      * 
      * @param chrononTime
      * @return
@@ -501,7 +528,8 @@
      * Get the month of the year for the given chronon time and the year.
      * <p/>
      * This code is directly from the Joda library BasicGJChronology.java.<br/>
-     * The original authers are Stephen Colebourne, Brain S O'Neill and Guy Allard, and modified by JArod Wen on May 7th, 2012.
+     * The original authers are Stephen Colebourne, Brain S O'Neill and Guy Allard, and modified by JArod Wen on May
+     * 7th, 2012 and commented by Theodoros Ioannou on July 2012.
      * <p/>
      * 
      * @param millis
@@ -565,7 +593,8 @@
      * Get the day of the given month and year for the input chronon time.
      * <p/>
      * This function is directly from Joda Library BasicChronology.java.<br/>
-     * The original authers are Stephen Colebourne, Brain S O'Neill and Guy Allard, and modified by JArod Wen on May 7th, 2012.
+     * The original authers are Stephen Colebourne, Brain S O'Neill and Guy Allard, and modified by JArod Wen on May
+     * 7th, 2012.
      * <p/>
      * 
      * @param millis
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/ICharSequenceAccessor.java b/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/ICharSequenceAccessor.java
index 6b4e898..d5a99a0 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/ICharSequenceAccessor.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/ICharSequenceAccessor.java
@@ -14,10 +14,23 @@
  */
 package edu.uci.ics.asterix.om.base.temporal;
 
+import edu.uci.ics.asterix.common.exceptions.AsterixRuntimeException;
+
 public interface ICharSequenceAccessor<T> {
 
-    public char getCharAt(int index);
+    /**
+     * Return the character in the wrapped char sequence at the given index.
+     * 
+     * @param index
+     * @return
+     */
+    public char getCharAt(int index) throws AsterixRuntimeException;
 
+    /**
+     * Get the length of the wrapped char sequence.
+     * 
+     * @return
+     */
     public int getLength();
 
 }
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/StringCharSequenceAccessor.java b/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/StringCharSequenceAccessor.java
index 6c02340..17e483a 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/StringCharSequenceAccessor.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/om/base/temporal/StringCharSequenceAccessor.java
@@ -14,24 +14,31 @@
  */
 package edu.uci.ics.asterix.om.base.temporal;
 
+import edu.uci.ics.asterix.common.exceptions.AsterixRuntimeException;
+
 public class StringCharSequenceAccessor implements ICharSequenceAccessor<String> {
 
     private String string;
     private int offset;
+    private int length;
 
     @Override
-    public char getCharAt(int index) {
+    public char getCharAt(int index) throws AsterixRuntimeException {
+        if (index >= length) {
+            throw new AsterixRuntimeException("String accessor is out of bound.");
+        }
         return string.charAt(index + offset);
     }
 
-    public void reset(String obj, int offset) {
-        string = obj;
+    public void reset(String obj, int offset, int len) {
+        this.string = obj;
         this.offset = offset;
+        this.length = len;
     }
 
     @Override
     public int getLength() {
-        return string.length() - offset;
+        return length;
     }
 
 }
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 2d4419f..a547737 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
@@ -12,6 +12,8 @@
 import edu.uci.ics.asterix.om.typecomputer.base.IResultTypeComputer;
 import edu.uci.ics.asterix.om.typecomputer.impl.ABooleanTypeComputer;
 import edu.uci.ics.asterix.om.typecomputer.impl.ACircleTypeComputer;
+import edu.uci.ics.asterix.om.typecomputer.impl.ADateTimeTypeComputer;
+import edu.uci.ics.asterix.om.typecomputer.impl.ADateTypeComputer;
 import edu.uci.ics.asterix.om.typecomputer.impl.ADoubleTypeComputer;
 import edu.uci.ics.asterix.om.typecomputer.impl.AFloatTypeComputer;
 import edu.uci.ics.asterix.om.typecomputer.impl.AInt32TypeComputer;
@@ -21,6 +23,7 @@
 import edu.uci.ics.asterix.om.typecomputer.impl.APolygonTypeComputer;
 import edu.uci.ics.asterix.om.typecomputer.impl.ARectangleTypeComputer;
 import edu.uci.ics.asterix.om.typecomputer.impl.AStringTypeComputer;
+import edu.uci.ics.asterix.om.typecomputer.impl.ATimeTypeComputer;
 import edu.uci.ics.asterix.om.typecomputer.impl.BinaryBooleanOrNullFunctionTypeComputer;
 import edu.uci.ics.asterix.om.typecomputer.impl.BinaryStringBoolOrNullTypeComputer;
 import edu.uci.ics.asterix.om.typecomputer.impl.BinaryStringStringOrNullTypeComputer;
@@ -40,6 +43,7 @@
 import edu.uci.ics.asterix.om.typecomputer.impl.NonTaggedUnaryMinusTypeComputer;
 import edu.uci.ics.asterix.om.typecomputer.impl.NotNullTypeComputer;
 import edu.uci.ics.asterix.om.typecomputer.impl.OpenRecordConstructorResultType;
+import edu.uci.ics.asterix.om.typecomputer.impl.OptionalABooleanTypeComputer;
 import edu.uci.ics.asterix.om.typecomputer.impl.OptionalACircleTypeComputer;
 import edu.uci.ics.asterix.om.typecomputer.impl.OptionalADateTimeTypeComputer;
 import edu.uci.ics.asterix.om.typecomputer.impl.OptionalADateTypeComputer;
@@ -50,6 +54,7 @@
 import edu.uci.ics.asterix.om.typecomputer.impl.OptionalAInt32TypeComputer;
 import edu.uci.ics.asterix.om.typecomputer.impl.OptionalAInt64TypeComputer;
 import edu.uci.ics.asterix.om.typecomputer.impl.OptionalAInt8TypeComputer;
+import edu.uci.ics.asterix.om.typecomputer.impl.OptionalAIntervalTypeComputer;
 import edu.uci.ics.asterix.om.typecomputer.impl.OptionalALineTypeComputer;
 import edu.uci.ics.asterix.om.typecomputer.impl.OptionalAPoint3DTypeComputer;
 import edu.uci.ics.asterix.om.typecomputer.impl.OptionalAPointTypeComputer;
@@ -274,8 +279,6 @@
     public final static FunctionIdentifier SERIAL_LOCAL_AVG = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
             "local-avg-serial", 1);
 
-    public final static FunctionIdentifier YEAR = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "year", 1);
-
     public final static FunctionIdentifier SCAN_COLLECTION = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
             "scan-collection", 1);
     public final static FunctionIdentifier SUBSET_COLLECTION = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
@@ -367,6 +370,49 @@
             "datetime", 1);
     public final static FunctionIdentifier DURATION_CONSTRUCTOR = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
             "duration", 1);
+    public final static FunctionIdentifier INTERVAL_CONSTRUCTOR_DATE = new FunctionIdentifier(
+            FunctionConstants.ASTERIX_NS, "interval-from-date", 2);
+    public final static FunctionIdentifier INTERVAL_CONSTRUCTOR_TIME = new FunctionIdentifier(
+            FunctionConstants.ASTERIX_NS, "interval-from-time", 2);
+    public final static FunctionIdentifier INTERVAL_CONSTRUCTOR_DATETIME = new FunctionIdentifier(
+            FunctionConstants.ASTERIX_NS, "interval-from-datetime", 2);
+    public final static FunctionIdentifier INTERVAL_CONSTRUCTOR_START_FROM_DATE = new FunctionIdentifier(
+            FunctionConstants.ASTERIX_NS, "interval-start-from-date", 2);
+    public final static FunctionIdentifier INTERVAL_CONSTRUCTOR_START_FROM_TIME = new FunctionIdentifier(
+            FunctionConstants.ASTERIX_NS, "interval-start-from-time", 2);
+    public final static FunctionIdentifier INTERVAL_CONSTRUCTOR_START_FROM_DATETIME = new FunctionIdentifier(
+            FunctionConstants.ASTERIX_NS, "interval-start-from-datetime", 2);
+    public final static FunctionIdentifier INTERVAL_BEFORE = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-before", 2);
+    public final static FunctionIdentifier INTERVAL_AFTER = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-after", 2);
+    public final static FunctionIdentifier INTERVAL_MEETS = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-meets", 2);
+    public final static FunctionIdentifier INTERVAL_MET_BY = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-met-by", 2);
+    public final static FunctionIdentifier INTERVAL_OVERLAPS = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-overlaps", 2);
+    public final static FunctionIdentifier INTERVAL_OVERLAPPED_BY = new FunctionIdentifier(
+            FunctionConstants.ASTERIX_NS, "interval-overlapped-by", 2);
+    public final static FunctionIdentifier OVERLAP = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "overlap", 2);
+    public final static FunctionIdentifier INTERVAL_STARTS = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-starts", 2);
+    public final static FunctionIdentifier INTERVAL_STARTED_BY = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-started-by", 2);
+    public final static FunctionIdentifier INTERVAL_COVERS = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-covers", 2);
+    public final static FunctionIdentifier INTERVAL_COVERED_BY = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-covered-by", 2);
+    public final static FunctionIdentifier INTERVAL_ENDS = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-ends", 2);
+    public final static FunctionIdentifier INTERVAL_ENDED_BY = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-ended-by", 2);
+    public final static FunctionIdentifier CURRENT_TIME = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "current-time", 0);
+    public final static FunctionIdentifier CURRENT_DATE = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "current-date", 0);
+    public final static FunctionIdentifier CURRENT_DATETIME = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "current-datetime", 0);
 
     // spatial
     public final static FunctionIdentifier CREATE_POINT = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
@@ -398,17 +444,62 @@
     public final static FunctionIdentifier CAST_RECORD = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
             "cast-record", 1);
 
-    public final static FunctionIdentifier GET_POINT_X_COORDINATE_ACCESSOR = new FunctionIdentifier(
-            FunctionConstants.ASTERIX_NS, "get-x", 1);
-    public final static FunctionIdentifier GET_POINT_Y_COORDINATE_ACCESSOR = new FunctionIdentifier(
-            FunctionConstants.ASTERIX_NS, "get-y", 1);
-    public final static FunctionIdentifier GET_CIRCLE_RADIUS_ACCESSOR = new FunctionIdentifier(
-            FunctionConstants.ASTERIX_NS, "get-radius", 1);
-    public final static FunctionIdentifier GET_CIRCLE_CENTER_ACCESSOR = new FunctionIdentifier(
-            FunctionConstants.ASTERIX_NS, "get-center", 1);
-    public final static FunctionIdentifier GET_POINTS_LINE_RECTANGLE_POLYGON_ACCESSOR = new FunctionIdentifier(
-            FunctionConstants.ASTERIX_NS, "get-points", 1);
+    // Spatial and temporal type accessors
+    public static final FunctionIdentifier ACCESSOR_TEMPORAL_YEAR = new FunctionIdentifier(
+            FunctionConstants.ASTERIX_NS, "year", 1);
+    public static final FunctionIdentifier ACCESSOR_TEMPORAL_MONTH = new FunctionIdentifier(
+            FunctionConstants.ASTERIX_NS, "month", 2);
+    public static final FunctionIdentifier ACCESSOR_TEMPORAL_DAY = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "day", 1);
+    public static final FunctionIdentifier ACCESSOR_TEMPORAL_HOUR = new FunctionIdentifier(
+            FunctionConstants.ASTERIX_NS, "hour", 1);
+    public static final FunctionIdentifier ACCESSOR_TEMPORAL_MIN = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "minute", 1);
+    public static final FunctionIdentifier ACCESSOR_TEMPORAL_SEC = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "second", 1);
+    public static final FunctionIdentifier ACCESSOR_TEMPORAL_MILLISEC = new FunctionIdentifier(
+            FunctionConstants.ASTERIX_NS, "millisecond", 1);
 
+    // Temporal functions
+    public static final FunctionIdentifier DATE_FROM_UNIX_TIME_IN_DAYS = new FunctionIdentifier(
+            FunctionConstants.ASTERIX_NS, "date-from-unix-time-in-days", 1);
+    public static final FunctionIdentifier DATE_FROM_DATETIME = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "date-from-datetime", 1);
+    public final static FunctionIdentifier ADD_DATE_DURATION = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "add-date-duration", 2);
+    public final static FunctionIdentifier SUBTRACT_DATE = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "subtract-date", 2);
+    public final static FunctionIdentifier TIME_FROM_UNIX_TIME_IN_MS = new FunctionIdentifier(
+            FunctionConstants.ASTERIX_NS, "time-from-unix-time-in-ms", 1);
+    public final static FunctionIdentifier TIME_FROM_DATETIME = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "time-from-datetime", 1);
+    public final static FunctionIdentifier SUBTRACT_TIME = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "subtract-time", 2);
+    public final static FunctionIdentifier ADD_TIME_DURATION = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "add-time-duration", 2);
+    public final static FunctionIdentifier DATETIME_FROM_UNIX_TIME_IN_MS = new FunctionIdentifier(
+            FunctionConstants.ASTERIX_NS, "datetime-from-unix-time-in-ms", 1);
+    public final static FunctionIdentifier DATETIME_FROM_DATE_TIME = new FunctionIdentifier(
+            FunctionConstants.ASTERIX_NS, "datetime-from-date-time", 2);
+    public final static FunctionIdentifier SUBTRACT_DATETIME = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "subtract-datetime", 2);
+    public final static FunctionIdentifier ADD_DATETIME_DURATION = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "add-datetime-duration", 2);
+    public final static FunctionIdentifier CALENDAR_DURATION_FROM_DATETIME = new FunctionIdentifier(
+            FunctionConstants.ASTERIX_NS, "calendar-duration-from-datetime", 2);
+    public final static FunctionIdentifier CALENDAR_DURATION_FROM_DATE = new FunctionIdentifier(
+            FunctionConstants.ASTERIX_NS, "calendar-duration-from-date", 2);
+    public final static FunctionIdentifier ADJUST_TIME_FOR_TIMEZONE = new FunctionIdentifier(
+            FunctionConstants.ASTERIX_NS, "adjust-time-for-timezone", 2);
+    public final static FunctionIdentifier ADJUST_DATETIME_FOR_TIMEZONE = new FunctionIdentifier(
+            FunctionConstants.ASTERIX_NS, "adjust-datetime-for-timezone", 2);
+
+    public final static FunctionIdentifier GET_POINT_X_COORDINATE_ACCESSOR = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "get-x", 1);
+    public final static FunctionIdentifier GET_POINT_Y_COORDINATE_ACCESSOR = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "get-y", 1);
+    public final static FunctionIdentifier GET_CIRCLE_RADIUS_ACCESSOR = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "get-radius", 1);
+    public final static FunctionIdentifier GET_CIRCLE_CENTER_ACCESSOR = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "get-center", 1);
+    public final static FunctionIdentifier GET_POINTS_LINE_RECTANGLE_POLYGON_ACCESSOR = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "get-points", 1);
+    
     public static final FunctionIdentifier EQ = AlgebricksBuiltinFunctions.EQ;
     public static final FunctionIdentifier LE = AlgebricksBuiltinFunctions.LE;
     public static final FunctionIdentifier GE = AlgebricksBuiltinFunctions.GE;
@@ -661,7 +752,6 @@
         add(TIME_CONSTRUCTOR, OptionalATimeTypeComputer.INSTANCE);
         add(TYPE_OF, null); // TODO
         add(UNORDERED_LIST_CONSTRUCTOR, UnorderedListConstructorResultType.INSTANCE);
-        add(YEAR, OptionalAInt32TypeComputer.INSTANCE);
         add(WORD_TOKENS, new IResultTypeComputer() {
 
             @Override
@@ -671,12 +761,64 @@
             }
         });
 
+        // temporal type accessors
+        add(ACCESSOR_TEMPORAL_YEAR, OptionalAInt32TypeComputer.INSTANCE);
+        add(ACCESSOR_TEMPORAL_MONTH, OptionalAInt32TypeComputer.INSTANCE);
+        add(ACCESSOR_TEMPORAL_DAY, OptionalAInt32TypeComputer.INSTANCE);
+        add(ACCESSOR_TEMPORAL_HOUR, OptionalAInt32TypeComputer.INSTANCE);
+        add(ACCESSOR_TEMPORAL_MIN, OptionalAInt32TypeComputer.INSTANCE);
+        add(ACCESSOR_TEMPORAL_SEC, OptionalAInt32TypeComputer.INSTANCE);
+        add(ACCESSOR_TEMPORAL_MILLISEC, OptionalAInt32TypeComputer.INSTANCE);
+
+        // temporal functions
+        add(DATE_FROM_UNIX_TIME_IN_DAYS, OptionalADateTypeComputer.INSTANCE);
+        add(DATE_FROM_DATETIME, OptionalADateTypeComputer.INSTANCE);
+        add(ADD_DATE_DURATION, OptionalADateTypeComputer.INSTANCE);
+        add(SUBTRACT_DATE, OptionalADurationTypeComputer.INSTANCE);
+        add(TIME_FROM_UNIX_TIME_IN_MS, OptionalATimeTypeComputer.INSTANCE);
+        add(TIME_FROM_DATETIME, OptionalATimeTypeComputer.INSTANCE);
+        add(SUBTRACT_TIME, OptionalADurationTypeComputer.INSTANCE);
+        add(ADD_TIME_DURATION, OptionalATimeTypeComputer.INSTANCE);
+        add(DATETIME_FROM_DATE_TIME, OptionalADateTimeTypeComputer.INSTANCE);
+        add(DATETIME_FROM_UNIX_TIME_IN_MS, OptionalADateTimeTypeComputer.INSTANCE);
+        add(SUBTRACT_DATETIME, OptionalADurationTypeComputer.INSTANCE);
+        add(ADD_DATETIME_DURATION, OptionalADateTimeTypeComputer.INSTANCE);
+        add(CALENDAR_DURATION_FROM_DATETIME, OptionalADurationTypeComputer.INSTANCE);
+        add(CALENDAR_DURATION_FROM_DATE, OptionalADurationTypeComputer.INSTANCE);
+        add(ADJUST_DATETIME_FOR_TIMEZONE, OptionalAStringTypeComputer.INSTANCE);
+        add(ADJUST_TIME_FOR_TIMEZONE, OptionalAStringTypeComputer.INSTANCE);
+        add(INTERVAL_BEFORE, OptionalABooleanTypeComputer.INSTANCE);
+        add(INTERVAL_AFTER, OptionalABooleanTypeComputer.INSTANCE);
+        add(INTERVAL_MEETS, OptionalABooleanTypeComputer.INSTANCE);
+        add(INTERVAL_MET_BY, OptionalABooleanTypeComputer.INSTANCE);
+        add(INTERVAL_OVERLAPS, OptionalABooleanTypeComputer.INSTANCE);
+        add(INTERVAL_OVERLAPPED_BY, OptionalABooleanTypeComputer.INSTANCE);
+        add(OVERLAP, OptionalABooleanTypeComputer.INSTANCE);
+        add(INTERVAL_STARTS, OptionalABooleanTypeComputer.INSTANCE);
+        add(INTERVAL_STARTED_BY, OptionalABooleanTypeComputer.INSTANCE);
+        add(INTERVAL_COVERS, OptionalABooleanTypeComputer.INSTANCE);
+        add(INTERVAL_COVERED_BY, OptionalABooleanTypeComputer.INSTANCE);
+        add(INTERVAL_ENDS, OptionalABooleanTypeComputer.INSTANCE);
+        add(INTERVAL_ENDED_BY, OptionalABooleanTypeComputer.INSTANCE);
+        add(CURRENT_DATE, ADateTypeComputer.INSTANCE);
+        add(CURRENT_TIME, ATimeTypeComputer.INSTANCE);
+        add(CURRENT_DATETIME, ADateTimeTypeComputer.INSTANCE);
+
+        // interval constructors
+        add(INTERVAL_CONSTRUCTOR_DATE, OptionalAIntervalTypeComputer.INSTANCE);
+        add(INTERVAL_CONSTRUCTOR_TIME, OptionalAIntervalTypeComputer.INSTANCE);
+        add(INTERVAL_CONSTRUCTOR_DATETIME, OptionalAIntervalTypeComputer.INSTANCE);
+        add(INTERVAL_CONSTRUCTOR_START_FROM_DATE, OptionalAIntervalTypeComputer.INSTANCE);
+        add(INTERVAL_CONSTRUCTOR_START_FROM_DATETIME, OptionalAIntervalTypeComputer.INSTANCE);
+        add(INTERVAL_CONSTRUCTOR_START_FROM_TIME, OptionalAIntervalTypeComputer.INSTANCE);
+
         String metadataFunctionLoaderClassName = "edu.uci.ics.asterix.metadata.functions.MetadataBuiltinFunctions";
         try {
             Class.forName(metadataFunctionLoaderClassName);
         } catch (ClassNotFoundException e) {
             throw new RuntimeException(e);
         }
+
     }
 
     static {
@@ -853,7 +995,7 @@
         funTypeComputer.put(functionInfo, typeComputer);
         finfoRepo.put(fi);
     }
-
+    
     private static IFunctionInfo addPrivateFunction(FunctionIdentifier fi, IResultTypeComputer typeComputer) {
         IFunctionInfo functionInfo = getAsterixFunctionInfo(fi);
         builtinFunctionsSet.put(functionInfo, functionInfo);
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/om/typecomputer/impl/ADateTimeTypeComputer.java b/asterix-om/src/main/java/edu/uci/ics/asterix/om/typecomputer/impl/ADateTimeTypeComputer.java
new file mode 100644
index 0000000..c7a51da
--- /dev/null
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/om/typecomputer/impl/ADateTimeTypeComputer.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.om.typecomputer.impl;
+
+import edu.uci.ics.asterix.om.typecomputer.base.IResultTypeComputer;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.om.types.IAType;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.IVariableTypeEnvironment;
+import edu.uci.ics.hyracks.algebricks.core.algebra.metadata.IMetadataProvider;
+
+public class ADateTimeTypeComputer implements IResultTypeComputer {
+
+    public static final ADateTimeTypeComputer INSTANCE = new ADateTimeTypeComputer();
+
+    private ADateTimeTypeComputer() {
+    }
+
+    @Override
+    public IAType computeType(ILogicalExpression expression, IVariableTypeEnvironment env,
+            IMetadataProvider<?, ?> metadataProvider) throws AlgebricksException {
+        return BuiltinType.ADATETIME;
+    }
+
+}
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/om/typecomputer/impl/ATimeTypeComputer.java b/asterix-om/src/main/java/edu/uci/ics/asterix/om/typecomputer/impl/ATimeTypeComputer.java
new file mode 100644
index 0000000..55e1bc4
--- /dev/null
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/om/typecomputer/impl/ATimeTypeComputer.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.om.typecomputer.impl;
+
+import edu.uci.ics.asterix.om.typecomputer.base.IResultTypeComputer;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.om.types.IAType;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.IVariableTypeEnvironment;
+import edu.uci.ics.hyracks.algebricks.core.algebra.metadata.IMetadataProvider;
+
+public class ATimeTypeComputer implements IResultTypeComputer {
+
+    public static final ATimeTypeComputer INSTANCE = new ATimeTypeComputer();
+
+    private ATimeTypeComputer() {
+    }
+
+    @Override
+    public IAType computeType(ILogicalExpression expression, IVariableTypeEnvironment env,
+            IMetadataProvider<?, ?> metadataProvider) throws AlgebricksException {
+        return BuiltinType.ATIME;
+    }
+
+}
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/om/typecomputer/impl/OptionalABooleanTypeComputer.java b/asterix-om/src/main/java/edu/uci/ics/asterix/om/typecomputer/impl/OptionalABooleanTypeComputer.java
new file mode 100644
index 0000000..abeea2a
--- /dev/null
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/om/typecomputer/impl/OptionalABooleanTypeComputer.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.om.typecomputer.impl;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import edu.uci.ics.asterix.om.typecomputer.base.IResultTypeComputer;
+import edu.uci.ics.asterix.om.types.AUnionType;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.om.types.IAType;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.IVariableTypeEnvironment;
+import edu.uci.ics.hyracks.algebricks.core.algebra.metadata.IMetadataProvider;
+
+public class OptionalABooleanTypeComputer implements IResultTypeComputer {
+
+    public static final OptionalABooleanTypeComputer INSTANCE = new OptionalABooleanTypeComputer();
+
+    private OptionalABooleanTypeComputer() {
+    }
+
+    @Override
+    public IAType computeType(ILogicalExpression expression, IVariableTypeEnvironment env,
+            IMetadataProvider<?, ?> metadataProvider) throws AlgebricksException {
+        List<IAType> unionList = new ArrayList<IAType>();
+        unionList.add(BuiltinType.ANULL);
+        unionList.add(BuiltinType.ABOOLEAN);
+        return new AUnionType(unionList, "OptionalBoolean");
+    }
+
+}
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/om/typecomputer/impl/OptionalAIntervalTypeComputer.java b/asterix-om/src/main/java/edu/uci/ics/asterix/om/typecomputer/impl/OptionalAIntervalTypeComputer.java
new file mode 100644
index 0000000..bb9f993
--- /dev/null
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/om/typecomputer/impl/OptionalAIntervalTypeComputer.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.om.typecomputer.impl;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import edu.uci.ics.asterix.om.typecomputer.base.IResultTypeComputer;
+import edu.uci.ics.asterix.om.types.AUnionType;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.om.types.IAType;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.base.ILogicalExpression;
+import edu.uci.ics.hyracks.algebricks.core.algebra.expressions.IVariableTypeEnvironment;
+import edu.uci.ics.hyracks.algebricks.core.algebra.metadata.IMetadataProvider;
+
+public class OptionalAIntervalTypeComputer implements IResultTypeComputer {
+
+    public static final OptionalAIntervalTypeComputer INSTANCE = new OptionalAIntervalTypeComputer();
+
+    private OptionalAIntervalTypeComputer() {
+
+    }
+
+    public IAType computeType(ILogicalExpression expression, IVariableTypeEnvironment env,
+            IMetadataProvider<?, ?> metadataProvider) throws AlgebricksException {
+        List<IAType> unionList = new ArrayList<IAType>();
+        unionList.add(BuiltinType.ANULL);
+        unionList.add(BuiltinType.AINTERVAL);
+        return new AUnionType(unionList, "OptionalInterval");
+    }
+
+}
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/om/types/ATypeTag.java b/asterix-om/src/main/java/edu/uci/ics/asterix/om/types/ATypeTag.java
index b75c074..e69fbcd 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/om/types/ATypeTag.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/om/types/ATypeTag.java
@@ -42,6 +42,7 @@
     LINE(30),
     POLYGON(31),
     CIRCLE(32),
+    INTERVAL(34),
     RECTANGLE(33),
     SYSTEM_NULL(34);
 
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/om/types/BuiltinType.java b/asterix-om/src/main/java/edu/uci/ics/asterix/om/types/BuiltinType.java
index 0ec3b21..4d9cd7f 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/om/types/BuiltinType.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/om/types/BuiltinType.java
@@ -329,6 +329,27 @@
 
     };
 
+    public final static BuiltinType AINTERVAL = new LowerCaseConstructorType() {
+
+        private static final long serialVersionUID = 1L;
+
+        @Override
+        public String getDisplayName() {
+            return "AInterval";
+        }
+
+        @Override
+        public ATypeTag getTypeTag() {
+            return ATypeTag.INTERVAL;
+        }
+
+        @Override
+        public String getTypeName() {
+            return "interval";
+        }
+
+    };
+
     public final static BuiltinType APOINT = new LowerCaseConstructorType() {
 
         private static final long serialVersionUID = 1L;
@@ -515,25 +536,25 @@
         return getTypeTag().toString();
     }
 
-	@Override
-	public boolean deepEqual(IAObject obj) {
-		if (obj == this) {
-			return true;
-		}
-		if (!(obj instanceof BuiltinType)) {
-			return false;
-		}
-		return ((BuiltinType) obj).getTypeTag().equals(getTypeTag());
-	}
+    @Override
+    public boolean deepEqual(IAObject obj) {
+        if (obj == this) {
+            return true;
+        }
+        if (!(obj instanceof BuiltinType)) {
+            return false;
+        }
+        return ((BuiltinType) obj).getTypeTag().equals(getTypeTag());
+    }
 
     @Override
     public boolean equals(Object object) {
         return this.deepEqual((IAObject) object);
     }
-    
+
     @Override
     public int hashCode() {
-    	return getTypeTag().hashCode();
+        return getTypeTag().hashCode();
     }
 
     @Override
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/om/util/NonTaggedFormatUtil.java b/asterix-om/src/main/java/edu/uci/ics/asterix/om/util/NonTaggedFormatUtil.java
index 8832164..a8c0485 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/om/util/NonTaggedFormatUtil.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/om/util/NonTaggedFormatUtil.java
@@ -95,6 +95,8 @@
                 return 12;
             case POINT:
                 return 16;
+            case INTERVAL:
+                return 17;
             case POINT3D:
             case CIRCLE:
                 return 24;
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/om/visitors/IOMVisitor.java b/asterix-om/src/main/java/edu/uci/ics/asterix/om/visitors/IOMVisitor.java
index 2c82174..703b792 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/om/visitors/IOMVisitor.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/om/visitors/IOMVisitor.java
@@ -14,6 +14,7 @@
 import edu.uci.ics.asterix.om.base.AInt32;
 import edu.uci.ics.asterix.om.base.AInt64;
 import edu.uci.ics.asterix.om.base.AInt8;
+import edu.uci.ics.asterix.om.base.AInterval;
 import edu.uci.ics.asterix.om.base.ALine;
 import edu.uci.ics.asterix.om.base.ANull;
 import edu.uci.ics.asterix.om.base.AOrderedList;
@@ -46,6 +47,8 @@
 
     public void visitADuration(ADuration obj) throws AsterixException;
 
+    public void visitAInterval(AInterval obj) throws AsterixException;
+
     public void visitADate(ADate obj) throws AsterixException;
 
     public void visitATime(ATime obj) throws AsterixException;
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/om/visitors/OMPrintToStringVisitor.java b/asterix-om/src/main/java/edu/uci/ics/asterix/om/visitors/OMPrintToStringVisitor.java
index 1697c5c..e7856f0 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/om/visitors/OMPrintToStringVisitor.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/om/visitors/OMPrintToStringVisitor.java
@@ -15,6 +15,7 @@
 import edu.uci.ics.asterix.om.base.AInt32;
 import edu.uci.ics.asterix.om.base.AInt64;
 import edu.uci.ics.asterix.om.base.AInt8;
+import edu.uci.ics.asterix.om.base.AInterval;
 import edu.uci.ics.asterix.om.base.ALine;
 import edu.uci.ics.asterix.om.base.ANull;
 import edu.uci.ics.asterix.om.base.AOrderedList;
@@ -90,6 +91,12 @@
     }
 
     @Override
+    public void visitAInterval(AInterval obj) throws AsterixException {
+        // TODO Auto-generated method stub
+        throw new NotImplementedException();
+    }
+
+    @Override
     public void visitAFloat(AFloat obj) throws AsterixException {
         buffer.append(obj.getFloatValue() + "f");
     }
diff --git a/asterix-runtime/pom.xml b/asterix-runtime/pom.xml
index ddc1cfd..93b38df 100644
--- a/asterix-runtime/pom.xml
+++ b/asterix-runtime/pom.xml
@@ -1,4 +1,5 @@
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 	<parent>
 		<artifactId>asterix</artifactId>
@@ -6,6 +7,8 @@
 		<version>0.0.4-SNAPSHOT</version>
 	</parent>
 	<artifactId>asterix-runtime</artifactId>
+
+
 	<build>
 		<plugins>
 			<plugin>
@@ -51,25 +54,25 @@
 		</dependency>
 		<dependency>
 			<groupId>edu.uci.ics.hyracks</groupId>
-		        <artifactId>hyracks-storage-am-btree</artifactId>
+			<artifactId>hyracks-storage-am-btree</artifactId>
 		</dependency>
 		<dependency>
-		        <groupId>edu.uci.ics.asterix</groupId>
-		        <artifactId>asterix-transactions</artifactId>
+			<groupId>edu.uci.ics.asterix</groupId>
+			<artifactId>asterix-transactions</artifactId>
 			<version>0.0.4-SNAPSHOT</version>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
-		        <groupId>org.twitter4j</groupId>
-		        <artifactId>twitter4j-core</artifactId>
-		        <version>2.2.3</version>
+			<groupId>org.twitter4j</groupId>
+			<artifactId>twitter4j-core</artifactId>
+			<version>2.2.3</version>
 		</dependency>
 		<dependency>
-		        <groupId>org.apache.hadoop</groupId>
-		        <artifactId>hadoop-core</artifactId>
-		        <version>0.20.2</version>
-		        <type>jar</type>
-		        <scope>compile</scope>
+			<groupId>org.apache.hadoop</groupId>
+			<artifactId>hadoop-core</artifactId>
+			<version>0.20.2</version>
+			<type>jar</type>
+			<scope>compile</scope>
 		</dependency>
 	</dependencies>
 
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/accessors/TemporalDayAccessor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/accessors/TemporalDayAccessor.java
new file mode 100644
index 0000000..05391de
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/accessors/TemporalDayAccessor.java
@@ -0,0 +1,145 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.accessors;
+
+import java.io.DataOutput;
+import java.io.IOException;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ADurationSerializerDeserializer;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AInt32SerializerDeserializer;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AInt64SerializerDeserializer;
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.AInt32;
+import edu.uci.ics.asterix.om.base.AMutableInt32;
+import edu.uci.ics.asterix.om.base.ANull;
+import edu.uci.ics.asterix.om.base.temporal.GregorianCalendarSystem;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.asterix.om.types.ATypeTag;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
+import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class TemporalDayAccessor extends AbstractScalarFunctionDynamicDescriptor {
+
+    private static final long serialVersionUID = 1L;
+
+    private static final FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "day", 1);
+
+    // allowed input types
+    private static final byte SER_DATE_TYPE_TAG = ATypeTag.DATE.serialize();
+    private static final byte SER_DATETIME_TYPE_TAG = ATypeTag.DATETIME.serialize();
+    private static final byte SER_DURATION_TYPE_TAG = ATypeTag.DURATION.serialize();
+    private static final byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize();
+
+    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new TemporalDayAccessor();
+        }
+    };
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.runtime.base.IScalarFunctionDynamicDescriptor#createEvaluatorFactory(edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory[])
+     */
+    @Override
+    public ICopyEvaluatorFactory createEvaluatorFactory(final ICopyEvaluatorFactory[] args) throws AlgebricksException {
+        return new ICopyEvaluatorFactory() {
+
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException {
+                return new ICopyEvaluator() {
+
+                    private DataOutput out = output.getDataOutput();
+
+                    private ArrayBackedValueStorage argOut = new ArrayBackedValueStorage();
+
+                    private ICopyEvaluator eval = args[0].createEvaluator(argOut);
+
+                    private GregorianCalendarSystem calSystem = GregorianCalendarSystem.getInstance();
+
+                    // for output: type integer
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<AInt32> intSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.AINT32);
+                    private AMutableInt32 aMutableInt32 = new AMutableInt32(0);
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ANULL);
+
+                    @Override
+                    public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
+                        argOut.reset();
+                        eval.evaluate(tuple);
+                        byte[] bytes = argOut.getByteArray();
+
+                        try {
+
+                            if (bytes[0] == SER_DURATION_TYPE_TAG) {
+                                aMutableInt32.setValue(calSystem.getDurationDay(ADurationSerializerDeserializer
+                                        .getDayTime(bytes, 1)));
+                                intSerde.serialize(aMutableInt32, out);
+                                return;
+                            }
+
+                            long chrononTimeInMs = 0;
+                            if (bytes[0] == SER_DATE_TYPE_TAG) {
+                                chrononTimeInMs = AInt32SerializerDeserializer.getInt(bytes, 1)
+                                        * GregorianCalendarSystem.CHRONON_OF_DAY;
+                            } else if (bytes[0] == SER_DATETIME_TYPE_TAG) {
+                                chrononTimeInMs = AInt64SerializerDeserializer.getLong(bytes, 1);
+                            } else if (bytes[0] == SER_NULL_TYPE_TAG) {
+                                nullSerde.serialize(ANull.NULL, out);
+                                return;
+                            } else {
+                                throw new AlgebricksException("Inapplicable input type: " + bytes[0]);
+                            }
+
+                            int year = calSystem.getYear(chrononTimeInMs);
+                            int month = calSystem.getMonthOfYear(chrononTimeInMs, year);
+                            int day = calSystem.getDayOfMonthYear(chrononTimeInMs, year, month);
+
+                            aMutableInt32.setValue(day);
+                            intSerde.serialize(aMutableInt32, out);
+
+                        } catch (IOException e) {
+                            throw new AlgebricksException(e);
+                        }
+                    }
+                };
+            }
+        };
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.functions.IFunctionDescriptor#getIdentifier()
+     */
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/accessors/TemporalHourAccessor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/accessors/TemporalHourAccessor.java
new file mode 100644
index 0000000..eba012f
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/accessors/TemporalHourAccessor.java
@@ -0,0 +1,143 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.accessors;
+
+import java.io.DataOutput;
+import java.io.IOException;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ADurationSerializerDeserializer;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AInt32SerializerDeserializer;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AInt64SerializerDeserializer;
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.AInt32;
+import edu.uci.ics.asterix.om.base.AMutableInt32;
+import edu.uci.ics.asterix.om.base.ANull;
+import edu.uci.ics.asterix.om.base.temporal.GregorianCalendarSystem;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.asterix.om.types.ATypeTag;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
+import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class TemporalHourAccessor extends AbstractScalarFunctionDynamicDescriptor {
+
+    private static final long serialVersionUID = 1L;
+
+    private static final FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "hour", 1);
+
+    // allowed input types
+    private static final byte SER_TIME_TYPE_TAG = ATypeTag.TIME.serialize();
+    private static final byte SER_DATETIME_TYPE_TAG = ATypeTag.DATETIME.serialize();
+    private static final byte SER_DURATION_TYPE_TAG = ATypeTag.DURATION.serialize();
+    private static final byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize();
+
+    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new TemporalHourAccessor();
+        }
+
+    };
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.runtime.base.IScalarFunctionDynamicDescriptor#createEvaluatorFactory(edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory[])
+     */
+    @Override
+    public ICopyEvaluatorFactory createEvaluatorFactory(final ICopyEvaluatorFactory[] args) throws AlgebricksException {
+        return new ICopyEvaluatorFactory() {
+
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException {
+                return new ICopyEvaluator() {
+
+                    private DataOutput out = output.getDataOutput();
+
+                    private ArrayBackedValueStorage argOut = new ArrayBackedValueStorage();
+
+                    private ICopyEvaluator eval = args[0].createEvaluator(argOut);
+
+                    private GregorianCalendarSystem calSystem = GregorianCalendarSystem.getInstance();
+
+                    // for output: type integer
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<AInt32> intSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.AINT32);
+                    private AMutableInt32 aMutableInt32 = new AMutableInt32(0);
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ANULL);
+
+                    @Override
+                    public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
+                        argOut.reset();
+                        eval.evaluate(tuple);
+                        byte[] bytes = argOut.getByteArray();
+
+                        try {
+
+                            if (bytes[0] == SER_DURATION_TYPE_TAG) {
+                                aMutableInt32.setValue(calSystem.getDurationHour(ADurationSerializerDeserializer
+                                        .getDayTime(bytes, 1)));
+                                intSerde.serialize(aMutableInt32, out);
+                                return;
+                            }
+
+                            long chrononTimeInMs = 0;
+                            if (bytes[0] == SER_TIME_TYPE_TAG) {
+                                chrononTimeInMs = AInt32SerializerDeserializer.getInt(bytes, 1);
+                            } else if (bytes[0] == SER_DATETIME_TYPE_TAG) {
+                                chrononTimeInMs = AInt64SerializerDeserializer.getLong(bytes, 1);
+                            } else if (bytes[0] == SER_NULL_TYPE_TAG) {
+                                nullSerde.serialize(ANull.NULL, out);
+                                return;
+                            } else {
+                                throw new AlgebricksException("Inapplicable input type: " + bytes[0]);
+                            }
+
+                            int hour = calSystem.getHourOfDay(chrononTimeInMs);
+
+                            aMutableInt32.setValue(hour);
+                            intSerde.serialize(aMutableInt32, out);
+
+                        } catch (IOException e) {
+                            throw new AlgebricksException(e);
+                        }
+                    }
+                };
+            }
+        };
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.functions.IFunctionDescriptor#getIdentifier()
+     */
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/accessors/TemporalMillisecondAccessor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/accessors/TemporalMillisecondAccessor.java
new file mode 100644
index 0000000..ecc1a35
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/accessors/TemporalMillisecondAccessor.java
@@ -0,0 +1,143 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.accessors;
+
+import java.io.DataOutput;
+import java.io.IOException;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ADurationSerializerDeserializer;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AInt32SerializerDeserializer;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AInt64SerializerDeserializer;
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.AInt32;
+import edu.uci.ics.asterix.om.base.AMutableInt32;
+import edu.uci.ics.asterix.om.base.ANull;
+import edu.uci.ics.asterix.om.base.temporal.GregorianCalendarSystem;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.asterix.om.types.ATypeTag;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
+import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class TemporalMillisecondAccessor extends AbstractScalarFunctionDynamicDescriptor {
+
+    private static final long serialVersionUID = 1L;
+
+    private static final FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "millisecond", 1);
+
+    // allowed input types
+    private static final byte SER_TIME_TYPE_TAG = ATypeTag.TIME.serialize();
+    private static final byte SER_DATETIME_TYPE_TAG = ATypeTag.DATETIME.serialize();
+    private static final byte SER_DURATION_TYPE_TAG = ATypeTag.DURATION.serialize();
+    private static final byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize();
+
+    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new TemporalMillisecondAccessor();
+        }
+
+    };
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.runtime.base.IScalarFunctionDynamicDescriptor#createEvaluatorFactory(edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory[])
+     */
+    @Override
+    public ICopyEvaluatorFactory createEvaluatorFactory(final ICopyEvaluatorFactory[] args) throws AlgebricksException {
+        return new ICopyEvaluatorFactory() {
+
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException {
+                return new ICopyEvaluator() {
+
+                    private DataOutput out = output.getDataOutput();
+
+                    private ArrayBackedValueStorage argOut = new ArrayBackedValueStorage();
+
+                    private ICopyEvaluator eval = args[0].createEvaluator(argOut);
+
+                    private GregorianCalendarSystem calSystem = GregorianCalendarSystem.getInstance();
+
+                    // for output: type integer
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<AInt32> intSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.AINT32);
+                    private AMutableInt32 aMutableInt32 = new AMutableInt32(0);
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ANULL);
+
+                    @Override
+                    public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
+                        argOut.reset();
+                        eval.evaluate(tuple);
+                        byte[] bytes = argOut.getByteArray();
+
+                        try {
+
+                            if (bytes[0] == SER_DURATION_TYPE_TAG) {
+                                aMutableInt32.setValue(calSystem.getDurationMillisecond(ADurationSerializerDeserializer
+                                        .getDayTime(bytes, 1)));
+                                intSerde.serialize(aMutableInt32, out);
+                                return;
+                            }
+
+                            long chrononTimeInMs = 0;
+                            if (bytes[0] == SER_TIME_TYPE_TAG) {
+                                chrononTimeInMs = AInt32SerializerDeserializer.getInt(bytes, 1);
+                            } else if (bytes[0] == SER_DATETIME_TYPE_TAG) {
+                                chrononTimeInMs = AInt64SerializerDeserializer.getLong(bytes, 1);
+                            } else if (bytes[0] == SER_NULL_TYPE_TAG) {
+                                nullSerde.serialize(ANull.NULL, out);
+                                return;
+                            } else {
+                                throw new AlgebricksException("Inapplicable input type: " + bytes[0]);
+                            }
+
+                            int ms = calSystem.getMillisOfSec(chrononTimeInMs);
+
+                            aMutableInt32.setValue(ms);
+                            intSerde.serialize(aMutableInt32, out);
+
+                        } catch (IOException e) {
+                            throw new AlgebricksException(e);
+                        }
+                    }
+                };
+            }
+        };
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.functions.IFunctionDescriptor#getIdentifier()
+     */
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/accessors/TemporalMinuteAccessor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/accessors/TemporalMinuteAccessor.java
new file mode 100644
index 0000000..f436016
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/accessors/TemporalMinuteAccessor.java
@@ -0,0 +1,143 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.accessors;
+
+import java.io.DataOutput;
+import java.io.IOException;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ADurationSerializerDeserializer;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AInt32SerializerDeserializer;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AInt64SerializerDeserializer;
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.AInt32;
+import edu.uci.ics.asterix.om.base.AMutableInt32;
+import edu.uci.ics.asterix.om.base.ANull;
+import edu.uci.ics.asterix.om.base.temporal.GregorianCalendarSystem;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.asterix.om.types.ATypeTag;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
+import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class TemporalMinuteAccessor extends AbstractScalarFunctionDynamicDescriptor {
+
+    private static final long serialVersionUID = 1L;
+
+    private static final FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "minute", 1);
+
+    // allowed input types
+    private static final byte SER_TIME_TYPE_TAG = ATypeTag.TIME.serialize();
+    private static final byte SER_DATETIME_TYPE_TAG = ATypeTag.DATETIME.serialize();
+    private static final byte SER_DURATION_TYPE_TAG = ATypeTag.DURATION.serialize();
+    private static final byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize();
+
+    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new TemporalMinuteAccessor();
+        }
+
+    };
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.runtime.base.IScalarFunctionDynamicDescriptor#createEvaluatorFactory(edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory[])
+     */
+    @Override
+    public ICopyEvaluatorFactory createEvaluatorFactory(final ICopyEvaluatorFactory[] args) throws AlgebricksException {
+        return new ICopyEvaluatorFactory() {
+
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException {
+                return new ICopyEvaluator() {
+
+                    private DataOutput out = output.getDataOutput();
+
+                    private ArrayBackedValueStorage argOut = new ArrayBackedValueStorage();
+
+                    private ICopyEvaluator eval = args[0].createEvaluator(argOut);
+
+                    private GregorianCalendarSystem calSystem = GregorianCalendarSystem.getInstance();
+
+                    // for output: type integer
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<AInt32> intSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.AINT32);
+                    private AMutableInt32 aMutableInt32 = new AMutableInt32(0);
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ANULL);
+
+                    @Override
+                    public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
+                        argOut.reset();
+                        eval.evaluate(tuple);
+                        byte[] bytes = argOut.getByteArray();
+
+                        try {
+
+                            if (bytes[0] == SER_DURATION_TYPE_TAG) {
+                                aMutableInt32.setValue(calSystem.getDurationMinute(ADurationSerializerDeserializer
+                                        .getDayTime(bytes, 1)));
+                                intSerde.serialize(aMutableInt32, out);
+                                return;
+                            }
+
+                            long chrononTimeInMs = 0;
+                            if (bytes[0] == SER_TIME_TYPE_TAG) {
+                                chrononTimeInMs = AInt32SerializerDeserializer.getInt(bytes, 1);
+                            } else if (bytes[0] == SER_DATETIME_TYPE_TAG) {
+                                chrononTimeInMs = AInt64SerializerDeserializer.getLong(bytes, 1);
+                            } else if (bytes[0] == SER_NULL_TYPE_TAG) {
+                                nullSerde.serialize(ANull.NULL, out);
+                                return;
+                            } else {
+                                throw new AlgebricksException("Inapplicable input type: " + bytes[0]);
+                            }
+
+                            int min = calSystem.getMinOfHour(chrononTimeInMs);
+
+                            aMutableInt32.setValue(min);
+                            intSerde.serialize(aMutableInt32, out);
+
+                        } catch (IOException e) {
+                            throw new AlgebricksException(e);
+                        }
+                    }
+                };
+            }
+        };
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.functions.IFunctionDescriptor#getIdentifier()
+     */
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/accessors/TemporalMonthAccessor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/accessors/TemporalMonthAccessor.java
new file mode 100644
index 0000000..fb68f7d
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/accessors/TemporalMonthAccessor.java
@@ -0,0 +1,145 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.accessors;
+
+import java.io.DataOutput;
+import java.io.IOException;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ADurationSerializerDeserializer;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AInt32SerializerDeserializer;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AInt64SerializerDeserializer;
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.AInt32;
+import edu.uci.ics.asterix.om.base.AMutableInt32;
+import edu.uci.ics.asterix.om.base.ANull;
+import edu.uci.ics.asterix.om.base.temporal.GregorianCalendarSystem;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.asterix.om.types.ATypeTag;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
+import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class TemporalMonthAccessor extends AbstractScalarFunctionDynamicDescriptor {
+
+    private static final long serialVersionUID = 1L;
+
+    private static final FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "month", 1);
+
+    // allowed input types
+    private static final byte SER_DATE_TYPE_TAG = ATypeTag.DATE.serialize();
+    private static final byte SER_DATETIME_TYPE_TAG = ATypeTag.DATETIME.serialize();
+    private static final byte SER_DURATION_TYPE_TAG = ATypeTag.DURATION.serialize();
+    private static final byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize();
+
+    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new TemporalMonthAccessor();
+        }
+
+    };
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.runtime.base.IScalarFunctionDynamicDescriptor#createEvaluatorFactory(edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory[])
+     */
+    @Override
+    public ICopyEvaluatorFactory createEvaluatorFactory(final ICopyEvaluatorFactory[] args) throws AlgebricksException {
+        return new ICopyEvaluatorFactory() {
+
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException {
+                return new ICopyEvaluator() {
+
+                    private DataOutput out = output.getDataOutput();
+
+                    private ArrayBackedValueStorage argOut = new ArrayBackedValueStorage();
+
+                    private ICopyEvaluator eval = args[0].createEvaluator(argOut);
+
+                    private GregorianCalendarSystem calSystem = GregorianCalendarSystem.getInstance();
+
+                    // for output: type integer
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<AInt32> intSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.AINT32);
+                    private AMutableInt32 aMutableInt32 = new AMutableInt32(0);
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ANULL);
+
+                    @Override
+                    public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
+                        argOut.reset();
+                        eval.evaluate(tuple);
+                        byte[] bytes = argOut.getByteArray();
+
+                        try {
+
+                            if (bytes[0] == SER_DURATION_TYPE_TAG) {
+                                aMutableInt32.setValue(calSystem.getDurationMonth(ADurationSerializerDeserializer
+                                        .getYearMonth(bytes, 1)));
+                                intSerde.serialize(aMutableInt32, out);
+                                return;
+                            }
+
+                            long chrononTimeInMs = 0;
+                            if (bytes[0] == SER_DATE_TYPE_TAG) {
+                                chrononTimeInMs = AInt32SerializerDeserializer.getInt(bytes, 1)
+                                        * GregorianCalendarSystem.CHRONON_OF_DAY;
+                            } else if (bytes[0] == SER_DATETIME_TYPE_TAG) {
+                                chrononTimeInMs = AInt64SerializerDeserializer.getLong(bytes, 1);
+                            } else if (bytes[0] == SER_NULL_TYPE_TAG) {
+                                nullSerde.serialize(ANull.NULL, out);
+                                return;
+                            } else {
+                                throw new AlgebricksException("Inapplicable input type: " + bytes[0]);
+                            }
+
+                            int year = calSystem.getYear(chrononTimeInMs);
+                            int month = calSystem.getMonthOfYear(chrononTimeInMs, year);
+
+                            aMutableInt32.setValue(month);
+                            intSerde.serialize(aMutableInt32, out);
+
+                        } catch (IOException e) {
+                            throw new AlgebricksException(e);
+                        }
+                    }
+                };
+            }
+        };
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.functions.IFunctionDescriptor#getIdentifier()
+     */
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/accessors/TemporalSecondAccessor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/accessors/TemporalSecondAccessor.java
new file mode 100644
index 0000000..3b9ee95
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/accessors/TemporalSecondAccessor.java
@@ -0,0 +1,143 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.accessors;
+
+import java.io.DataOutput;
+import java.io.IOException;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ADurationSerializerDeserializer;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AInt32SerializerDeserializer;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AInt64SerializerDeserializer;
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.AInt32;
+import edu.uci.ics.asterix.om.base.AMutableInt32;
+import edu.uci.ics.asterix.om.base.ANull;
+import edu.uci.ics.asterix.om.base.temporal.GregorianCalendarSystem;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.asterix.om.types.ATypeTag;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
+import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class TemporalSecondAccessor extends AbstractScalarFunctionDynamicDescriptor {
+
+    private static final long serialVersionUID = 1L;
+
+    private static final FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "second", 1);
+
+    // allowed input types
+    private static final byte SER_TIME_TYPE_TAG = ATypeTag.TIME.serialize();
+    private static final byte SER_DATETIME_TYPE_TAG = ATypeTag.DATETIME.serialize();
+    private static final byte SER_DURATION_TYPE_TAG = ATypeTag.DURATION.serialize();
+    private static final byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize();
+
+    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new TemporalSecondAccessor();
+        }
+
+    };
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.runtime.base.IScalarFunctionDynamicDescriptor#createEvaluatorFactory(edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory[])
+     */
+    @Override
+    public ICopyEvaluatorFactory createEvaluatorFactory(final ICopyEvaluatorFactory[] args) throws AlgebricksException {
+        return new ICopyEvaluatorFactory() {
+
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException {
+                return new ICopyEvaluator() {
+
+                    private DataOutput out = output.getDataOutput();
+
+                    private ArrayBackedValueStorage argOut = new ArrayBackedValueStorage();
+
+                    private ICopyEvaluator eval = args[0].createEvaluator(argOut);
+
+                    private GregorianCalendarSystem calSystem = GregorianCalendarSystem.getInstance();
+
+                    // for output: type integer
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<AInt32> intSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.AINT32);
+                    private AMutableInt32 aMutableInt32 = new AMutableInt32(0);
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ANULL);
+
+                    @Override
+                    public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
+                        argOut.reset();
+                        eval.evaluate(tuple);
+                        byte[] bytes = argOut.getByteArray();
+
+                        try {
+
+                            if (bytes[0] == SER_DURATION_TYPE_TAG) {
+                                aMutableInt32.setValue(calSystem.getDurationSecond(ADurationSerializerDeserializer
+                                        .getDayTime(bytes, 1)));
+                                intSerde.serialize(aMutableInt32, out);
+                                return;
+                            }
+
+                            long chrononTimeInMs = 0;
+                            if (bytes[0] == SER_TIME_TYPE_TAG) {
+                                chrononTimeInMs = AInt32SerializerDeserializer.getInt(bytes, 1);
+                            } else if (bytes[0] == SER_DATETIME_TYPE_TAG) {
+                                chrononTimeInMs = AInt64SerializerDeserializer.getLong(bytes, 1);
+                            } else if (bytes[0] == SER_NULL_TYPE_TAG) {
+                                nullSerde.serialize(ANull.NULL, out);
+                                return;
+                            } else {
+                                throw new AlgebricksException("Inapplicable input type: " + bytes[0]);
+                            }
+
+                            int sec = calSystem.getSecOfMin(chrononTimeInMs);
+
+                            aMutableInt32.setValue(sec);
+                            intSerde.serialize(aMutableInt32, out);
+
+                        } catch (IOException e) {
+                            throw new AlgebricksException(e);
+                        }
+                    }
+                };
+            }
+        };
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.functions.IFunctionDescriptor#getIdentifier()
+     */
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/accessors/TemporalYearAccessor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/accessors/TemporalYearAccessor.java
new file mode 100644
index 0000000..41dacfd
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/accessors/TemporalYearAccessor.java
@@ -0,0 +1,156 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.accessors;
+
+import java.io.DataOutput;
+import java.io.IOException;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ADurationSerializerDeserializer;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AInt32SerializerDeserializer;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AInt64SerializerDeserializer;
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.AInt32;
+import edu.uci.ics.asterix.om.base.AMutableInt32;
+import edu.uci.ics.asterix.om.base.ANull;
+import edu.uci.ics.asterix.om.base.temporal.GregorianCalendarSystem;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.asterix.om.types.ATypeTag;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
+import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
+import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class TemporalYearAccessor extends AbstractScalarFunctionDynamicDescriptor {
+
+    private static final long serialVersionUID = 1L;
+
+    private static final FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "year", 1);
+
+    // allowed input types
+    private static final byte SER_DATE_TYPE_TAG = ATypeTag.DATE.serialize();
+    private static final byte SER_DATETIME_TYPE_TAG = ATypeTag.DATETIME.serialize();
+    private static final byte SER_DURATION_TYPE_TAG = ATypeTag.DURATION.serialize();
+    private static final byte SER_STRING_TYPE_TAG = ATypeTag.STRING.serialize();
+    private static final byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize();
+
+    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new TemporalYearAccessor();
+        }
+    };
+
+    @Override
+    public ICopyEvaluatorFactory createEvaluatorFactory(final ICopyEvaluatorFactory[] args) throws AlgebricksException {
+        return new ICopyEvaluatorFactory() {
+
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException {
+                return new ICopyEvaluator() {
+
+                    private DataOutput out = output.getDataOutput();
+
+                    private ArrayBackedValueStorage argOut = new ArrayBackedValueStorage();
+
+                    private ICopyEvaluator eval = args[0].createEvaluator(argOut);
+
+                    private GregorianCalendarSystem calSystem = GregorianCalendarSystem.getInstance();
+
+                    // for output: type integer
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<AInt32> intSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.AINT32);
+                    private AMutableInt32 aMutableInt32 = new AMutableInt32(0);
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ANULL);
+
+                    @Override
+                    public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
+                        argOut.reset();
+                        eval.evaluate(tuple);
+                        byte[] bytes = argOut.getByteArray();
+
+                        try {
+
+                            if (bytes[0] == SER_DURATION_TYPE_TAG) {
+                                aMutableInt32.setValue(calSystem.getDurationYear(ADurationSerializerDeserializer
+                                        .getYearMonth(bytes, 1)));
+                                intSerde.serialize(aMutableInt32, out);
+                                return;
+                            }
+
+                            long chrononTimeInMs = 0;
+                            if (bytes[0] == SER_DATE_TYPE_TAG) {
+                                chrononTimeInMs = AInt32SerializerDeserializer.getInt(bytes, 1)
+                                        * GregorianCalendarSystem.CHRONON_OF_DAY;
+                            } else if (bytes[0] == SER_DATETIME_TYPE_TAG) {
+                                chrononTimeInMs = AInt64SerializerDeserializer.getLong(bytes, 1);
+                            } else if (bytes[0] == SER_NULL_TYPE_TAG) {
+                                nullSerde.serialize(ANull.NULL, out);
+                                return;
+                            } else if (bytes[0] == SER_STRING_TYPE_TAG) {
+                                int year;
+                                if (UTF8StringPointable.charAt(bytes, 3) == '-') {
+                                    // in case of a negative year
+                                    year = -1
+                                            * ((UTF8StringPointable.charAt(bytes, 4) - '0') * 1000
+                                                    + (UTF8StringPointable.charAt(bytes, 5) - '0') * 100
+                                                    + (UTF8StringPointable.charAt(bytes, 6) - '0') * 10 + (UTF8StringPointable
+                                                    .charAt(bytes, 7) - '0'));
+                                } else {
+                                    year = (UTF8StringPointable.charAt(bytes, 3) - '0') * 1000
+                                            + (UTF8StringPointable.charAt(bytes, 4) - '0') * 100
+                                            + (UTF8StringPointable.charAt(bytes, 5) - '0') * 10
+                                            + (UTF8StringPointable.charAt(bytes, 6) - '0');
+                                }
+                                aMutableInt32.setValue(year);
+                                intSerde.serialize(aMutableInt32, out);
+                                return;
+                            } else {
+                                throw new AlgebricksException("Inapplicable input type: " + bytes[0]);
+                            }
+
+                            int year = calSystem.getYear(chrononTimeInMs);
+
+                            aMutableInt32.setValue(year);
+                            intSerde.serialize(aMutableInt32, out);
+
+                        } catch (IOException e) {
+                            throw new AlgebricksException(e);
+                        }
+                    }
+                };
+            }
+        };
+    }
+
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/comparisons/AbstractComparisonEvaluator.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/comparisons/AbstractComparisonEvaluator.java
index 18fc2d7..2b4ea3a 100644
--- a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/comparisons/AbstractComparisonEvaluator.java
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/comparisons/AbstractComparisonEvaluator.java
@@ -2,6 +2,7 @@
 
 import java.io.DataOutput;
 
+import edu.uci.ics.asterix.dataflow.data.nontagged.comparators.ADateOrTimeAscBinaryComparatorFactory;
 import edu.uci.ics.asterix.dataflow.data.nontagged.comparators.ADateTimeAscBinaryComparatorFactory;
 import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ADoubleSerializerDeserializer;
 import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AFloatSerializerDeserializer;
@@ -50,6 +51,8 @@
             .createBinaryComparator();
     protected IBinaryComparator dateTimeBinaryComp = ADateTimeAscBinaryComparatorFactory.INSTANCE
             .createBinaryComparator();
+    protected IBinaryComparator dateOrTimeBinaryComp = ADateOrTimeAscBinaryComparatorFactory.INSTANCE
+            .createBinaryComparator();
 
     public AbstractComparisonEvaluator(DataOutput out, ICopyEvaluatorFactory evalLeftFactory,
             ICopyEvaluatorFactory evalRightFactory) throws AlgebricksException {
@@ -119,6 +122,10 @@
             case DATETIME: {
                 return compareDateTimeWithArg(typeTag2);
             }
+            case DATE:
+            case TIME: {
+                return compareDateOrTimeWithArg(typeTag2);
+            }
             default: {
                 throw new AlgebricksException("Comparison is undefined between types " + typeTag1 + " and " + typeTag2
                         + " .");
@@ -126,6 +133,22 @@
         }
     }
 
+    private ComparisonResult compareDateOrTimeWithArg(ATypeTag typeTag2) throws AlgebricksException {
+        if (typeTag2 == ATypeTag.NULL) {
+            return ComparisonResult.GREATER_THAN;
+        } else if (typeTag2 == ATypeTag.DATETIME) {
+            int result = dateOrTimeBinaryComp.compare(outLeft.getByteArray(), 1, outLeft.getLength() - 1,
+                    outRight.getByteArray(), 1, outRight.getLength() - 1);
+            if (result == 0)
+                return ComparisonResult.EQUAL;
+            else if (result < 0)
+                return ComparisonResult.LESS_THAN;
+            else
+                return ComparisonResult.GREATER_THAN;
+        }
+        throw new AlgebricksException("Comparison is undefined between types ADateTime and " + typeTag2 + " .");
+    }
+
     private ComparisonResult compareDateTimeWithArg(ATypeTag typeTag2) throws AlgebricksException {
         if (typeTag2 == ATypeTag.NULL) {
             return ComparisonResult.GREATER_THAN;
@@ -153,8 +176,8 @@
 
     private ComparisonResult compareStringWithArg(ATypeTag typeTag2) throws AlgebricksException {
         if (typeTag2 == ATypeTag.STRING) {
-            int result = strBinaryComp.compare(outLeft.getByteArray(), 1, outLeft.getLength() - 1, outRight.getByteArray(), 1,
-                    outRight.getLength() - 1);
+            int result = strBinaryComp.compare(outLeft.getByteArray(), 1, outLeft.getLength() - 1,
+                    outRight.getByteArray(), 1, outRight.getLength() - 1);
             if (result == 0)
                 return ComparisonResult.EQUAL;
             else if (result < 0)
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 cfebf48..44fcf7c 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
@@ -21,7 +21,7 @@
 import edu.uci.ics.asterix.om.base.ADate;
 import edu.uci.ics.asterix.om.base.AMutableDate;
 import edu.uci.ics.asterix.om.base.ANull;
-import edu.uci.ics.asterix.om.base.temporal.ADateAndTimeParser;
+import edu.uci.ics.asterix.om.base.temporal.ADateParserFactory;
 import edu.uci.ics.asterix.om.base.temporal.ByteArrayCharSequenceAccessor;
 import edu.uci.ics.asterix.om.base.temporal.GregorianCalendarSystem;
 import edu.uci.ics.asterix.om.functions.AsterixBuiltinFunctions;
@@ -84,8 +84,10 @@
                             byte[] serString = outInput.getByteArray();
                             if (serString[0] == SER_STRING_TYPE_TAG) {
 
-                                charAccessor.reset(serString, 3, 0);
-                                long chrononTimeInMs = ADateAndTimeParser.parseDatePart(charAccessor, true);
+                                int stringLength = (serString[1] & 0xff << 8) + (serString[2] & 0xff << 0);
+
+                                charAccessor.reset(serString, 3, stringLength);
+                                long chrononTimeInMs = ADateParserFactory.parseDatePart(charAccessor, true);
 
                                 short temp = 0;
                                 if (chrononTimeInMs < 0
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 19849aa..6a5783b 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
@@ -21,7 +21,8 @@
 import edu.uci.ics.asterix.om.base.ADateTime;
 import edu.uci.ics.asterix.om.base.AMutableDateTime;
 import edu.uci.ics.asterix.om.base.ANull;
-import edu.uci.ics.asterix.om.base.temporal.ADateAndTimeParser;
+import edu.uci.ics.asterix.om.base.temporal.ADateParserFactory;
+import edu.uci.ics.asterix.om.base.temporal.ATimeParserFactory;
 import edu.uci.ics.asterix.om.base.temporal.ByteArrayCharSequenceAccessor;
 import edu.uci.ics.asterix.om.functions.AsterixBuiltinFunctions;
 import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
@@ -71,7 +72,6 @@
                     @SuppressWarnings("unchecked")
                     private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
                             .getSerializerDeserializer(BuiltinType.ANULL);
-
                     private ByteArrayCharSequenceAccessor charAccessor = new ByteArrayCharSequenceAccessor();
 
                     @Override
@@ -82,7 +82,10 @@
                             eval.evaluate(tuple);
                             byte[] serString = outInput.getByteArray();
                             if (serString[0] == SER_STRING_TYPE_TAG) {
-                                charAccessor.reset(serString, 3, 0);
+
+                                int stringLength = (serString[1] & 0xff << 8) + (serString[2] & 0xff << 0);
+
+                                charAccessor.reset(serString, 3, stringLength);
 
                                 // +1 if it is negative (-)
                                 short timeOffset = (short) ((charAccessor.getCharAt(0) == '-') ? 1 : 0);
@@ -96,11 +99,11 @@
                                 timeOffset += (charAccessor.getCharAt(timeOffset + 13) == ':') ? (short) (11)
                                         : (short) (9);
 
-                                long chrononTimeInMs = ADateAndTimeParser.parseDatePart(charAccessor, false);
+                                long chrononTimeInMs = ADateParserFactory.parseDatePart(charAccessor, false);
 
-                                charAccessor.reset(serString, 3, timeOffset);
+                                charAccessor.reset(serString, 3 + timeOffset, stringLength - timeOffset);
 
-                                chrononTimeInMs += ADateAndTimeParser.parseTimePart(charAccessor);
+                                chrononTimeInMs += ATimeParserFactory.parseTimePart(charAccessor);
 
                                 aDateTime.setValue(chrononTimeInMs);
                                 datetimeSerde.serialize(aDateTime, out);
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/ADurationConstructorDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/ADurationConstructorDescriptor.java
index f0660f5..b2b3f4e 100644
--- a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/ADurationConstructorDescriptor.java
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/ADurationConstructorDescriptor.java
@@ -20,7 +20,7 @@
 import edu.uci.ics.asterix.om.base.ADuration;
 import edu.uci.ics.asterix.om.base.AMutableDuration;
 import edu.uci.ics.asterix.om.base.ANull;
-import edu.uci.ics.asterix.om.base.temporal.ADurationParser;
+import edu.uci.ics.asterix.om.base.temporal.ADurationParserFactory;
 import edu.uci.ics.asterix.om.base.temporal.ByteArrayCharSequenceAccessor;
 import edu.uci.ics.asterix.om.functions.AsterixBuiltinFunctions;
 import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
@@ -83,9 +83,11 @@
 
                             if (serString[0] == SER_STRING_TYPE_TAG) {
 
-                                charAccessor.reset(serString, 3, 0);
+                                int stringLength = (serString[1] & 0xff << 8) + (serString[2] & 0xff << 0);
 
-                                ADurationParser.parse(charAccessor, aDuration);
+                                charAccessor.reset(serString, 3, stringLength);
+
+                                ADurationParserFactory.parseDuration(charAccessor, aDuration);
 
                                 durationSerde.serialize(aDuration, out);
                             } else if (serString[0] == SER_NULL_TYPE_TAG) {
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/AInt64ConstructorDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/AInt64ConstructorDescriptor.java
index 15e3e72..6fa4925 100644
--- a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/AInt64ConstructorDescriptor.java
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/AInt64ConstructorDescriptor.java
@@ -98,8 +98,9 @@
                                     else
                                         throw new AlgebricksException(errorMessage);
                                 }
-                                if (value < 0)
+                                if (value < 0 && value != -9223372036854775808L) {
                                     throw new AlgebricksException(errorMessage);
+                                }
                                 if (value > 0 && !positive)
                                     value *= -1;
 
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/AIntervalFromDateConstructorDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/AIntervalFromDateConstructorDescriptor.java
new file mode 100644
index 0000000..e1a12f8
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/AIntervalFromDateConstructorDescriptor.java
@@ -0,0 +1,142 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.constructors;
+
+import java.io.DataOutput;
+import java.io.IOException;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.AInterval;
+import edu.uci.ics.asterix.om.base.AMutableInterval;
+import edu.uci.ics.asterix.om.base.ANull;
+import edu.uci.ics.asterix.om.base.temporal.ADateParserFactory;
+import edu.uci.ics.asterix.om.base.temporal.ByteArrayCharSequenceAccessor;
+import edu.uci.ics.asterix.om.base.temporal.GregorianCalendarSystem;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.asterix.om.types.ATypeTag;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
+import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class AIntervalFromDateConstructorDescriptor extends AbstractScalarFunctionDynamicDescriptor {
+
+    private static final long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-from-date", 2);
+    private final static byte SER_STRING_TYPE_TAG = ATypeTag.STRING.serialize();
+    private final static byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize();
+
+    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new AIntervalFromDateConstructorDescriptor();
+        }
+    };
+
+    @Override
+    public ICopyEvaluatorFactory createEvaluatorFactory(final ICopyEvaluatorFactory[] args) {
+        return new ICopyEvaluatorFactory() {
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException {
+                return new ICopyEvaluator() {
+
+                    private DataOutput out = output.getDataOutput();
+
+                    private ArrayBackedValueStorage argOut0 = new ArrayBackedValueStorage();
+                    private ArrayBackedValueStorage argOut1 = new ArrayBackedValueStorage();
+                    private ICopyEvaluator eval0 = args[0].createEvaluator(argOut0);
+                    private ICopyEvaluator eval1 = args[1].createEvaluator(argOut1);
+                    private String errorMessage = "This can not be an instance of interval (from Date)";
+                    //TODO: Where to move and fix these?
+                    private AMutableInterval aInterval = new AMutableInterval(0L, 0L, (byte) 0);
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<AInterval> intervalSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.AINTERVAL);
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ANULL);
+
+                    private ByteArrayCharSequenceAccessor charAccessor = new ByteArrayCharSequenceAccessor();
+
+                    @Override
+                    public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
+
+                        argOut0.reset();
+                        argOut1.reset();
+                        eval0.evaluate(tuple);
+                        eval1.evaluate(tuple);
+
+                        try {
+
+                            if (argOut0.getByteArray()[0] == SER_NULL_TYPE_TAG
+                                    || argOut1.getByteArray()[0] == SER_NULL_TYPE_TAG) {
+                                nullSerde.serialize(ANull.NULL, out);
+                            } else if (argOut0.getByteArray()[0] == SER_STRING_TYPE_TAG
+                                    && argOut1.getByteArray()[0] == SER_STRING_TYPE_TAG) {
+
+                                int stringLength = (argOut0.getByteArray()[1] & 0xff << 8)
+                                        + (argOut0.getByteArray()[2] & 0xff << 0);
+
+                                // start date
+                                charAccessor.reset(argOut0.getByteArray(), 3, stringLength);
+                                long intervalStart = ADateParserFactory.parseDatePart(charAccessor, true)
+                                        / GregorianCalendarSystem.CHRONON_OF_DAY;
+                                // end date
+
+                                stringLength = (argOut1.getByteArray()[1] & 0xff << 8)
+                                        + (argOut1.getByteArray()[2] & 0xff << 0);
+
+                                charAccessor.reset(argOut1.getByteArray(), 3, stringLength);
+                                long intervalEnd = ADateParserFactory.parseDatePart(charAccessor, true)
+                                        / GregorianCalendarSystem.CHRONON_OF_DAY;
+
+                                if (intervalEnd < intervalStart) {
+                                    throw new AlgebricksException(
+                                            "Interval end must not be less than the interval start.");
+                                }
+
+                                aInterval.setValue(intervalStart, intervalEnd, ATypeTag.DATE.serialize());
+                                intervalSerde.serialize(aInterval, out);
+                            } else {
+                                throw new AlgebricksException("Wrong format for interval constructor from dates.");
+                            }
+
+                        } catch (IOException e1) {
+                            throw new AlgebricksException(errorMessage);
+                        } catch (Exception e2) {
+                            throw new AlgebricksException(e2);
+                        }
+                    }
+                };
+            }
+        };
+    }
+
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+}
\ No newline at end of file
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/AIntervalFromDateTimeConstructorDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/AIntervalFromDateTimeConstructorDescriptor.java
new file mode 100644
index 0000000..72a8e37
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/AIntervalFromDateTimeConstructorDescriptor.java
@@ -0,0 +1,167 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.constructors;
+
+import java.io.DataOutput;
+import java.io.IOException;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.AInterval;
+import edu.uci.ics.asterix.om.base.AMutableInterval;
+import edu.uci.ics.asterix.om.base.ANull;
+import edu.uci.ics.asterix.om.base.temporal.ADateParserFactory;
+import edu.uci.ics.asterix.om.base.temporal.ATimeParserFactory;
+import edu.uci.ics.asterix.om.base.temporal.ByteArrayCharSequenceAccessor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.asterix.om.types.ATypeTag;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
+import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class AIntervalFromDateTimeConstructorDescriptor extends AbstractScalarFunctionDynamicDescriptor {
+
+    private static final long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-from-datetime", 2);
+    private final static byte SER_STRING_TYPE_TAG = ATypeTag.STRING.serialize();
+    private final static byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize();
+
+    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new AIntervalFromDateTimeConstructorDescriptor();
+        }
+    };
+
+    @Override
+    public ICopyEvaluatorFactory createEvaluatorFactory(final ICopyEvaluatorFactory[] args) {
+        return new ICopyEvaluatorFactory() {
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException {
+                return new ICopyEvaluator() {
+
+                    private DataOutput out = output.getDataOutput();
+
+                    private ArrayBackedValueStorage argOut0 = new ArrayBackedValueStorage();
+                    private ArrayBackedValueStorage argOut1 = new ArrayBackedValueStorage();
+                    private ICopyEvaluator eval0 = args[0].createEvaluator(argOut0);
+                    private ICopyEvaluator eval1 = args[1].createEvaluator(argOut1);
+                    private String errorMessage = "This can not be an instance of interval (from Date)";
+                    //TODO: Where to move and fix these?
+                    private AMutableInterval aInterval = new AMutableInterval(0L, 0L, (byte) 0);
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<AInterval> intervalSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.AINTERVAL);
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ANULL);
+
+                    private ByteArrayCharSequenceAccessor charAccessor = new ByteArrayCharSequenceAccessor();
+
+                    @Override
+                    public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
+
+                        argOut0.reset();
+                        argOut1.reset();
+                        eval0.evaluate(tuple);
+                        eval1.evaluate(tuple);
+
+                        try {
+
+                            if (argOut0.getByteArray()[0] == SER_NULL_TYPE_TAG
+                                    || argOut1.getByteArray()[0] == SER_NULL_TYPE_TAG) {
+                                nullSerde.serialize(ANull.NULL, out);
+                            } else if (argOut0.getByteArray()[0] == SER_STRING_TYPE_TAG
+                                    && argOut1.getByteArray()[0] == SER_STRING_TYPE_TAG) {
+                                // start date
+
+                                int stringLength = (argOut0.getByteArray()[1] & 0xff << 8)
+                                        + (argOut0.getByteArray()[2] & 0xff << 0);
+
+                                charAccessor.reset(argOut0.getByteArray(), 3, stringLength);
+                                // get offset for time part: +1 if it is negative (-)
+                                short timeOffset = (short) ((charAccessor.getCharAt(0) == '-') ? 1 : 0);
+
+                                if (charAccessor.getCharAt(timeOffset + 10) != 'T'
+                                        && charAccessor.getCharAt(timeOffset + 8) != 'T') {
+                                    throw new AlgebricksException(errorMessage + ": missing T");
+                                }
+
+                                // if extended form 11, else 9
+                                timeOffset += (charAccessor.getCharAt(timeOffset + 13) == ':') ? (short) (11)
+                                        : (short) (9);
+                                long intervalStart = ADateParserFactory.parseDatePart(charAccessor, false);
+                                charAccessor.reset(argOut0.getByteArray(), 3 + timeOffset, stringLength - timeOffset);
+                                intervalStart += ATimeParserFactory.parseTimePart(charAccessor);
+
+                                // end date
+
+                                stringLength = (argOut1.getByteArray()[1] & 0xff << 8)
+                                        + (argOut1.getByteArray()[2] & 0xff << 0);
+
+                                charAccessor.reset(argOut1.getByteArray(), 3, stringLength);
+                                // get offset for time part: +1 if it is negative (-)
+                                timeOffset = (short) ((charAccessor.getCharAt(0) == '-') ? 1 : 0);
+
+                                if (charAccessor.getCharAt(timeOffset + 10) != 'T'
+                                        && charAccessor.getCharAt(timeOffset + 8) != 'T') {
+                                    throw new AlgebricksException(errorMessage + ": missing T");
+                                }
+
+                                // if extended form 11, else 9
+                                timeOffset += (charAccessor.getCharAt(timeOffset + 13) == ':') ? (short) (11)
+                                        : (short) (9);
+                                long intervalEnd = ADateParserFactory.parseDatePart(charAccessor, false);
+                                charAccessor.reset(argOut1.getByteArray(), 3 + timeOffset, stringLength - timeOffset);
+                                intervalEnd += ATimeParserFactory.parseTimePart(charAccessor);
+
+                                if (intervalEnd < intervalStart) {
+                                    throw new AlgebricksException(
+                                            "Interval end must not be less than the interval start.");
+                                }
+
+                                aInterval.setValue(intervalStart, intervalEnd, ATypeTag.DATETIME.serialize());
+                                intervalSerde.serialize(aInterval, out);
+                            } else {
+                                throw new AlgebricksException("Wrong format for interval constructor from dates.");
+                            }
+
+                        } catch (IOException e1) {
+                            throw new AlgebricksException(errorMessage);
+                        } catch (Exception e2) {
+                            throw new AlgebricksException(e2);
+                        }
+                    }
+                };
+            }
+        };
+    }
+
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+}
\ No newline at end of file
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/AIntervalFromTimeConstructorDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/AIntervalFromTimeConstructorDescriptor.java
new file mode 100644
index 0000000..3ce722a
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/AIntervalFromTimeConstructorDescriptor.java
@@ -0,0 +1,147 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.constructors;
+
+import java.io.DataOutput;
+import java.io.IOException;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.AInterval;
+import edu.uci.ics.asterix.om.base.AMutableInterval;
+import edu.uci.ics.asterix.om.base.ANull;
+import edu.uci.ics.asterix.om.base.temporal.ATimeParserFactory;
+import edu.uci.ics.asterix.om.base.temporal.ByteArrayCharSequenceAccessor;
+import edu.uci.ics.asterix.om.base.temporal.GregorianCalendarSystem;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.asterix.om.types.ATypeTag;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
+import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class AIntervalFromTimeConstructorDescriptor extends AbstractScalarFunctionDynamicDescriptor {
+
+    private static final long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-from-time", 2);
+    private final static byte SER_STRING_TYPE_TAG = ATypeTag.STRING.serialize();
+    private final static byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize();
+
+    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new AIntervalFromTimeConstructorDescriptor();
+        }
+    };
+
+    @Override
+    public ICopyEvaluatorFactory createEvaluatorFactory(final ICopyEvaluatorFactory[] args) {
+        return new ICopyEvaluatorFactory() {
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException {
+                return new ICopyEvaluator() {
+
+                    private DataOutput out = output.getDataOutput();
+
+                    private ArrayBackedValueStorage argOut0 = new ArrayBackedValueStorage();
+                    private ArrayBackedValueStorage argOut1 = new ArrayBackedValueStorage();
+                    private ICopyEvaluator eval0 = args[0].createEvaluator(argOut0);
+                    private ICopyEvaluator eval1 = args[1].createEvaluator(argOut1);
+                    private String errorMessage = "This can not be an instance of interval (from Date)";
+                    //TODO: Where to move and fix these?
+                    private AMutableInterval aInterval = new AMutableInterval(0L, 0L, (byte) 0);
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<AInterval> intervalSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.AINTERVAL);
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ANULL);
+
+                    private ByteArrayCharSequenceAccessor charAccessor = new ByteArrayCharSequenceAccessor();
+
+                    @Override
+                    public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
+
+                        argOut0.reset();
+                        argOut1.reset();
+                        eval0.evaluate(tuple);
+                        eval1.evaluate(tuple);
+
+                        try {
+
+                            if (argOut0.getByteArray()[0] == SER_NULL_TYPE_TAG
+                                    || argOut1.getByteArray()[0] == SER_NULL_TYPE_TAG) {
+                                nullSerde.serialize(ANull.NULL, out);
+                            } else if (argOut0.getByteArray()[0] == SER_STRING_TYPE_TAG
+                                    && argOut1.getByteArray()[0] == SER_STRING_TYPE_TAG) {
+                                // start date
+
+                                int stringLength = (argOut0.getByteArray()[1] & 0xff << 8)
+                                        + (argOut0.getByteArray()[2] & 0xff << 0);
+
+                                charAccessor.reset(argOut0.getByteArray(), 3, stringLength);
+                                long intervalStart = ATimeParserFactory.parseTimePart(charAccessor);
+                                if (intervalStart < 0) {
+                                    intervalStart += GregorianCalendarSystem.CHRONON_OF_DAY;
+                                }
+
+                                // end date
+
+                                stringLength = (argOut1.getByteArray()[1] & 0xff << 8)
+                                        + (argOut1.getByteArray()[2] & 0xff << 0);
+
+                                charAccessor.reset(argOut1.getByteArray(), 3, stringLength);
+                                long intervalEnd = ATimeParserFactory.parseTimePart(charAccessor);
+                                if (intervalEnd < 0) {
+                                    intervalEnd += GregorianCalendarSystem.CHRONON_OF_DAY;
+                                }
+
+                                if (intervalEnd < intervalStart) {
+                                    throw new AlgebricksException(
+                                            "Interval end must not be less than the interval start.");
+                                }
+
+                                aInterval.setValue(intervalStart, intervalEnd, ATypeTag.TIME.serialize());
+                                intervalSerde.serialize(aInterval, out);
+                            } else {
+                                throw new AlgebricksException("Wrong format for interval constructor from dates.");
+                            }
+
+                        } catch (IOException e1) {
+                            throw new AlgebricksException(errorMessage);
+                        } catch (Exception e2) {
+                            throw new AlgebricksException(e2);
+                        }
+                    }
+                };
+            }
+        };
+    }
+
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+}
\ No newline at end of file
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/AIntervalStartFromDateConstructorDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/AIntervalStartFromDateConstructorDescriptor.java
new file mode 100644
index 0000000..23fdb07
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/AIntervalStartFromDateConstructorDescriptor.java
@@ -0,0 +1,150 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.constructors;
+
+import java.io.DataOutput;
+import java.io.IOException;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.AInterval;
+import edu.uci.ics.asterix.om.base.AMutableDuration;
+import edu.uci.ics.asterix.om.base.AMutableInterval;
+import edu.uci.ics.asterix.om.base.ANull;
+import edu.uci.ics.asterix.om.base.temporal.ADateParserFactory;
+import edu.uci.ics.asterix.om.base.temporal.ADurationParserFactory;
+import edu.uci.ics.asterix.om.base.temporal.ByteArrayCharSequenceAccessor;
+import edu.uci.ics.asterix.om.base.temporal.DurationArithmeticOperations;
+import edu.uci.ics.asterix.om.base.temporal.GregorianCalendarSystem;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.asterix.om.types.ATypeTag;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
+import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class AIntervalStartFromDateConstructorDescriptor extends AbstractScalarFunctionDynamicDescriptor {
+
+    private static final long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-start-from-date", 2);
+    private final static byte SER_STRING_TYPE_TAG = ATypeTag.STRING.serialize();
+    private final static byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize();
+
+    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new AIntervalStartFromDateConstructorDescriptor();
+        }
+    };
+
+    @Override
+    public ICopyEvaluatorFactory createEvaluatorFactory(final ICopyEvaluatorFactory[] args) {
+        return new ICopyEvaluatorFactory() {
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException {
+                return new ICopyEvaluator() {
+
+                    private DataOutput out = output.getDataOutput();
+
+                    private ArrayBackedValueStorage argOut0 = new ArrayBackedValueStorage();
+                    private ArrayBackedValueStorage argOut1 = new ArrayBackedValueStorage();
+                    private ICopyEvaluator eval0 = args[0].createEvaluator(argOut0);
+                    private ICopyEvaluator eval1 = args[1].createEvaluator(argOut1);
+                    private String errorMessage = "This can not be an instance of interval (from Date)";
+
+                    private AMutableInterval aInterval = new AMutableInterval(0L, 0L, (byte) 0);
+                    private AMutableDuration aDuration = new AMutableDuration(0, 0L);
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<AInterval> intervalSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.AINTERVAL);
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ANULL);
+
+                    private ByteArrayCharSequenceAccessor charAccessor = new ByteArrayCharSequenceAccessor();
+
+                    @Override
+                    public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
+
+                        argOut0.reset();
+                        argOut1.reset();
+                        eval0.evaluate(tuple);
+                        eval1.evaluate(tuple);
+
+                        try {
+
+                            if (argOut0.getByteArray()[0] == SER_NULL_TYPE_TAG
+                                    || argOut1.getByteArray()[0] == SER_NULL_TYPE_TAG) {
+                                nullSerde.serialize(ANull.NULL, out);
+                            } else if (argOut0.getByteArray()[0] == SER_STRING_TYPE_TAG
+                                    && argOut1.getByteArray()[0] == SER_STRING_TYPE_TAG) {
+                                // start date
+
+                                int stringLength = (argOut0.getByteArray()[1] & 0xff << 8)
+                                        + (argOut0.getByteArray()[2] & 0xff << 0);
+
+                                charAccessor.reset(argOut0.getByteArray(), 3, stringLength);
+                                long intervalStart = ADateParserFactory.parseDatePart(charAccessor, true);
+                                // duration
+
+                                stringLength = (argOut1.getByteArray()[1] & 0xff << 8)
+                                        + (argOut1.getByteArray()[2] & 0xff << 0);
+
+                                charAccessor.reset(argOut1.getByteArray(), 3, stringLength);
+                                ADurationParserFactory.parseDuration(charAccessor, aDuration);
+
+                                long intervalEnd = DurationArithmeticOperations.addDuration(intervalStart,
+                                        aDuration.getMonths(), aDuration.getMilliseconds());
+
+                                intervalStart = GregorianCalendarSystem.getChrononInDays(intervalStart);
+                                intervalEnd = GregorianCalendarSystem.getChrononInDays(intervalEnd);
+
+                                if (intervalEnd < intervalStart) {
+                                    throw new AlgebricksException(
+                                            "Interval end must not be less than the interval start.");
+                                }
+
+                                aInterval.setValue(intervalStart, intervalEnd, ATypeTag.DATE.serialize());
+                                intervalSerde.serialize(aInterval, out);
+                            } else {
+                                throw new AlgebricksException("Wrong format for interval constructor from dates.");
+                            }
+
+                        } catch (IOException e1) {
+                            throw new AlgebricksException(errorMessage);
+                        } catch (Exception e2) {
+                            throw new AlgebricksException(e2);
+                        }
+                    }
+                };
+            }
+        };
+    }
+
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+}
\ No newline at end of file
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/AIntervalStartFromDateTimeConstructorDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/AIntervalStartFromDateTimeConstructorDescriptor.java
new file mode 100644
index 0000000..91c45df
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/AIntervalStartFromDateTimeConstructorDescriptor.java
@@ -0,0 +1,161 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.constructors;
+
+import java.io.DataOutput;
+import java.io.IOException;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.AInterval;
+import edu.uci.ics.asterix.om.base.AMutableDuration;
+import edu.uci.ics.asterix.om.base.AMutableInterval;
+import edu.uci.ics.asterix.om.base.ANull;
+import edu.uci.ics.asterix.om.base.temporal.ADateParserFactory;
+import edu.uci.ics.asterix.om.base.temporal.ADurationParserFactory;
+import edu.uci.ics.asterix.om.base.temporal.ATimeParserFactory;
+import edu.uci.ics.asterix.om.base.temporal.ByteArrayCharSequenceAccessor;
+import edu.uci.ics.asterix.om.base.temporal.DurationArithmeticOperations;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.asterix.om.types.ATypeTag;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
+import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class AIntervalStartFromDateTimeConstructorDescriptor extends AbstractScalarFunctionDynamicDescriptor {
+
+    private static final long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-start-from-datetime", 2);
+    private final static byte SER_STRING_TYPE_TAG = ATypeTag.STRING.serialize();
+    private final static byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize();
+
+    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new AIntervalStartFromDateTimeConstructorDescriptor();
+        }
+    };
+
+    @Override
+    public ICopyEvaluatorFactory createEvaluatorFactory(final ICopyEvaluatorFactory[] args) {
+        return new ICopyEvaluatorFactory() {
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException {
+                return new ICopyEvaluator() {
+
+                    private DataOutput out = output.getDataOutput();
+
+                    private ArrayBackedValueStorage argOut0 = new ArrayBackedValueStorage();
+                    private ArrayBackedValueStorage argOut1 = new ArrayBackedValueStorage();
+                    private ICopyEvaluator eval0 = args[0].createEvaluator(argOut0);
+                    private ICopyEvaluator eval1 = args[1].createEvaluator(argOut1);
+                    private String errorMessage = "This can not be an instance of interval (from Date)";
+
+                    private AMutableInterval aInterval = new AMutableInterval(0L, 0L, (byte) 0);
+                    private AMutableDuration aDuration = new AMutableDuration(0, 0L);
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<AInterval> intervalSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.AINTERVAL);
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ANULL);
+
+                    private ByteArrayCharSequenceAccessor charAccessor = new ByteArrayCharSequenceAccessor();
+
+                    @Override
+                    public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
+
+                        argOut0.reset();
+                        argOut1.reset();
+                        eval0.evaluate(tuple);
+                        eval1.evaluate(tuple);
+
+                        try {
+
+                            if (argOut0.getByteArray()[0] == SER_NULL_TYPE_TAG
+                                    || argOut1.getByteArray()[0] == SER_NULL_TYPE_TAG) {
+                                nullSerde.serialize(ANull.NULL, out);
+                            } else if (argOut0.getByteArray()[0] == SER_STRING_TYPE_TAG
+                                    && argOut1.getByteArray()[0] == SER_STRING_TYPE_TAG) {
+                                // start date
+
+                                int stringLength = (argOut0.getByteArray()[1] & 0xff << 8)
+                                        + (argOut0.getByteArray()[2] & 0xff << 0);
+
+                                charAccessor.reset(argOut0.getByteArray(), 3, stringLength);
+                                // get offset for time part: +1 if it is negative (-)
+                                short timeOffset = (short) ((charAccessor.getCharAt(0) == '-') ? 1 : 0);
+
+                                if (charAccessor.getCharAt(timeOffset + 10) != 'T'
+                                        && charAccessor.getCharAt(timeOffset + 8) != 'T') {
+                                    throw new AlgebricksException(errorMessage + ": missing T");
+                                }
+
+                                // if extended form 11, else 9
+                                timeOffset += (charAccessor.getCharAt(timeOffset + 13) == ':') ? (short) (11)
+                                        : (short) (9);
+                                long intervalStart = ADateParserFactory.parseDatePart(charAccessor, false);
+                                charAccessor.reset(argOut0.getByteArray(), 3 + timeOffset, stringLength - timeOffset);
+                                intervalStart += ATimeParserFactory.parseTimePart(charAccessor);
+
+                                // duration
+
+                                stringLength = (argOut1.getByteArray()[1] & 0xff << 8)
+                                        + (argOut1.getByteArray()[2] & 0xff << 0);
+
+                                charAccessor.reset(argOut1.getByteArray(), 3, stringLength);
+                                ADurationParserFactory.parseDuration(charAccessor, aDuration);
+
+                                long intervalEnd = DurationArithmeticOperations.addDuration(intervalStart,
+                                        aDuration.getMonths(), aDuration.getMilliseconds());
+
+                                if (intervalEnd < intervalStart) {
+                                    throw new AlgebricksException(
+                                            "Interval end must not be less than the interval start.");
+                                }
+
+                                aInterval.setValue(intervalStart, intervalEnd, ATypeTag.DATETIME.serialize());
+                                intervalSerde.serialize(aInterval, out);
+                            } else {
+                                throw new AlgebricksException("Wrong format for interval constructor from dates.");
+                            }
+
+                        } catch (IOException e1) {
+                            throw new AlgebricksException(errorMessage);
+                        } catch (Exception e2) {
+                            throw new AlgebricksException(e2);
+                        }
+                    }
+                };
+            }
+        };
+    }
+
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+}
\ No newline at end of file
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/AIntervalStartFromTimeConstructorDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/AIntervalStartFromTimeConstructorDescriptor.java
new file mode 100644
index 0000000..e576fef
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/constructors/AIntervalStartFromTimeConstructorDescriptor.java
@@ -0,0 +1,161 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.constructors;
+
+import java.io.DataOutput;
+import java.io.IOException;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.AInterval;
+import edu.uci.ics.asterix.om.base.AMutableDuration;
+import edu.uci.ics.asterix.om.base.AMutableInterval;
+import edu.uci.ics.asterix.om.base.ANull;
+import edu.uci.ics.asterix.om.base.temporal.ADurationParserFactory;
+import edu.uci.ics.asterix.om.base.temporal.ATimeParserFactory;
+import edu.uci.ics.asterix.om.base.temporal.ByteArrayCharSequenceAccessor;
+import edu.uci.ics.asterix.om.base.temporal.DurationArithmeticOperations;
+import edu.uci.ics.asterix.om.base.temporal.GregorianCalendarSystem;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.asterix.om.types.ATypeTag;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
+import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class AIntervalStartFromTimeConstructorDescriptor extends AbstractScalarFunctionDynamicDescriptor {
+
+    private static final long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-start-from-time", 2);
+    private final static byte SER_STRING_TYPE_TAG = ATypeTag.STRING.serialize();
+    private final static byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize();
+
+    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new AIntervalStartFromTimeConstructorDescriptor();
+        }
+    };
+
+    @Override
+    public ICopyEvaluatorFactory createEvaluatorFactory(final ICopyEvaluatorFactory[] args) {
+        return new ICopyEvaluatorFactory() {
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException {
+                return new ICopyEvaluator() {
+
+                    private DataOutput out = output.getDataOutput();
+
+                    private ArrayBackedValueStorage argOut0 = new ArrayBackedValueStorage();
+                    private ArrayBackedValueStorage argOut1 = new ArrayBackedValueStorage();
+                    private ICopyEvaluator eval0 = args[0].createEvaluator(argOut0);
+                    private ICopyEvaluator eval1 = args[1].createEvaluator(argOut1);
+                    private String errorMessage = "This can not be an instance of interval (from Date)";
+
+                    private AMutableInterval aInterval = new AMutableInterval(0L, 0L, (byte) 0);
+                    private AMutableDuration aDuration = new AMutableDuration(0, 0L);
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<AInterval> intervalSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.AINTERVAL);
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ANULL);
+
+                    private ByteArrayCharSequenceAccessor charAccessor = new ByteArrayCharSequenceAccessor();
+
+                    @Override
+                    public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
+
+                        argOut0.reset();
+                        argOut1.reset();
+                        eval0.evaluate(tuple);
+                        eval1.evaluate(tuple);
+
+                        try {
+
+                            if (argOut0.getByteArray()[0] == SER_NULL_TYPE_TAG
+                                    || argOut1.getByteArray()[0] == SER_NULL_TYPE_TAG) {
+                                nullSerde.serialize(ANull.NULL, out);
+                            } else if (argOut0.getByteArray()[0] == SER_STRING_TYPE_TAG
+                                    && argOut1.getByteArray()[0] == SER_STRING_TYPE_TAG) {
+                                // start time
+
+                                int stringLength = (argOut0.getByteArray()[1] & 0xff << 8)
+                                        + (argOut0.getByteArray()[2] & 0xff << 0);
+
+                                charAccessor.reset(argOut0.getByteArray(), 3, stringLength);
+                                int intervalStart = ATimeParserFactory.parseTimePart(charAccessor);
+
+                                if (intervalStart < 0) {
+                                    intervalStart += GregorianCalendarSystem.CHRONON_OF_DAY;
+                                }
+
+                                // duration
+
+                                stringLength = (argOut1.getByteArray()[1] & 0xff << 8)
+                                        + (argOut1.getByteArray()[2] & 0xff << 0);
+
+                                charAccessor.reset(argOut1.getByteArray(), 3, stringLength);
+                                ADurationParserFactory.parseDuration(charAccessor, aDuration);
+
+                                if (aDuration.getMonths() != 0) {
+                                    throw new AlgebricksException("Cannot add a year-month duration to a time value.");
+                                }
+
+                                int intervalEnd = DurationArithmeticOperations.addDuration(intervalStart,
+                                        aDuration.getMilliseconds());
+
+                                if (intervalEnd > GregorianCalendarSystem.CHRONON_OF_DAY) {
+
+                                    intervalEnd = intervalEnd - (int) (GregorianCalendarSystem.CHRONON_OF_DAY);
+                                }
+
+                                if (intervalEnd < intervalStart) {
+                                    throw new AlgebricksException(
+                                            "Interval end must not be less than the interval start.");
+                                }
+
+                                aInterval.setValue(intervalStart, intervalEnd, ATypeTag.TIME.serialize());
+                                intervalSerde.serialize(aInterval, out);
+                            } else {
+                                throw new AlgebricksException("Wrong format for interval constructor from dates.");
+                            }
+
+                        } catch (IOException e1) {
+                            throw new AlgebricksException(errorMessage);
+                        } catch (Exception e2) {
+                            throw new AlgebricksException(e2);
+                        }
+                    }
+                };
+            }
+        };
+    }
+
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+}
\ No newline at end of file
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 1a7eb12..caff78b 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
@@ -21,8 +21,9 @@
 import edu.uci.ics.asterix.om.base.AMutableTime;
 import edu.uci.ics.asterix.om.base.ANull;
 import edu.uci.ics.asterix.om.base.ATime;
-import edu.uci.ics.asterix.om.base.temporal.ADateAndTimeParser;
+import edu.uci.ics.asterix.om.base.temporal.ATimeParserFactory;
 import edu.uci.ics.asterix.om.base.temporal.ByteArrayCharSequenceAccessor;
+import edu.uci.ics.asterix.om.base.temporal.GregorianCalendarSystem;
 import edu.uci.ics.asterix.om.functions.AsterixBuiltinFunctions;
 import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
 import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
@@ -82,8 +83,15 @@
                             eval.evaluate(tuple);
                             byte[] serString = outInput.getByteArray();
                             if (serString[0] == SER_STRING_TYPE_TAG) {
-                                charAccessor.reset(serString, 3, 0);
-                                int chrononTimeInMs = ADateAndTimeParser.parseTimePart(charAccessor);
+
+                                int stringLength = (serString[1] & 0xff << 8) + (serString[2] & 0xff << 0);
+
+                                charAccessor.reset(serString, 3, stringLength);
+                                int chrononTimeInMs = ATimeParserFactory.parseTimePart(charAccessor);
+
+                                if (chrononTimeInMs < 0) {
+                                    chrononTimeInMs += GregorianCalendarSystem.CHRONON_OF_DAY;
+                                }
 
                                 aTime.setValue(chrononTimeInMs);
                                 timeSerde.serialize(aTime, out);
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/YearDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/YearDescriptor.java
deleted file mode 100644
index 107f3cd..0000000
--- a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/YearDescriptor.java
+++ /dev/null
@@ -1,102 +0,0 @@
-package edu.uci.ics.asterix.runtime.evaluators.functions;
-
-import java.io.DataOutput;
-
-import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
-import edu.uci.ics.asterix.om.base.AInt32;
-import edu.uci.ics.asterix.om.base.AMutableInt32;
-import edu.uci.ics.asterix.om.base.ANull;
-import edu.uci.ics.asterix.om.functions.AsterixBuiltinFunctions;
-import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
-import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
-import edu.uci.ics.asterix.om.types.ATypeTag;
-import edu.uci.ics.asterix.om.types.BuiltinType;
-import edu.uci.ics.asterix.om.types.EnumDeserializer;
-import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
-import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
-import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
-import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
-import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
-import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
-import edu.uci.ics.hyracks.data.std.primitive.UTF8StringPointable;
-import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
-import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
-
-public class YearDescriptor extends AbstractScalarFunctionDynamicDescriptor {
-
-    private static final long serialVersionUID = 1L;
-    private final static byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize();
-    private final static byte SER_STRING_TYPE_TAG = ATypeTag.STRING.serialize();
-    public static final IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
-        public IFunctionDescriptor createFunctionDescriptor() {
-            return new YearDescriptor();
-        }
-    };
-
-    @Override
-    public FunctionIdentifier getIdentifier() {
-        return AsterixBuiltinFunctions.YEAR;
-    }
-
-    /**
-     * Returns the 4-digit representation of a year from a string, as an int32.
-     * e.g. year('2010-10-24') = 2010
-     */
-
-    @Override
-    public ICopyEvaluatorFactory createEvaluatorFactory(final ICopyEvaluatorFactory[] args) {
-
-        return new ICopyEvaluatorFactory() {
-            private static final long serialVersionUID = 1L;
-
-            @Override
-            public ICopyEvaluator createEvaluator(IDataOutputProvider output) throws AlgebricksException {
-                final DataOutput out = output.getDataOutput();
-
-                return new ICopyEvaluator() {
-                    private ArrayBackedValueStorage out1 = new ArrayBackedValueStorage();
-                    private ICopyEvaluator eval1 = args[0].createEvaluator(out1);
-                    private AMutableInt32 m = new AMutableInt32(0);
-                    @SuppressWarnings("unchecked")
-                    private ISerializerDeserializer<AInt32> int32Serde = AqlSerializerDeserializerProvider.INSTANCE
-                            .getSerializerDeserializer(BuiltinType.AINT32);
-                    @SuppressWarnings("unchecked")
-                    private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
-                            .getSerializerDeserializer(BuiltinType.ANULL);
-
-                    @Override
-                    public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
-                        try {
-                            out1.reset();
-                            eval1.evaluate(tuple);
-                            byte[] dateArray = out1.getByteArray();
-
-                            if (dateArray[0] == SER_NULL_TYPE_TAG) {
-                                nullSerde.serialize(ANull.NULL, out);
-                                return;
-                            }
-
-                            if (dateArray[0] != SER_STRING_TYPE_TAG) {
-                                throw new AlgebricksException("year function can not be called on values of type"
-                                        + EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(dateArray[0]));
-                            }
-
-                            int year = (UTF8StringPointable.charAt(dateArray, 3) - '0') * 1000
-                                    + (UTF8StringPointable.charAt(dateArray, 4) - '0') * 100
-                                    + (UTF8StringPointable.charAt(dateArray, 5) - '0') * 10
-                                    + (UTF8StringPointable.charAt(dateArray, 6) - '0');
-                            m.setValue(year);
-
-                            int32Serde.serialize(m, out);
-                        } catch (HyracksDataException e) {
-                            throw new AlgebricksException(e);
-                        }
-                    }
-                };
-            }
-        };
-    }
-
-}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/AbstractIntervalLogicFuncDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/AbstractIntervalLogicFuncDescriptor.java
new file mode 100644
index 0000000..241e2e0
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/AbstractIntervalLogicFuncDescriptor.java
@@ -0,0 +1,117 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.functions.temporal;
+
+import java.io.DataOutput;
+
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AIntervalSerializerDeserializer;
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.ABoolean;
+import edu.uci.ics.asterix.om.base.ANull;
+import edu.uci.ics.asterix.om.types.ATypeTag;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
+import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public abstract class AbstractIntervalLogicFuncDescriptor extends AbstractScalarFunctionDynamicDescriptor {
+
+    private final static long serialVersionUID = 1L;
+
+    // allowed input types
+    private final static byte SER_INTERVAL_TYPE_TAG = ATypeTag.INTERVAL.serialize();
+    private final static byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize();
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.runtime.base.IScalarFunctionDynamicDescriptor#createEvaluatorFactory(edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory[])
+     */
+    @Override
+    public ICopyEvaluatorFactory createEvaluatorFactory(final ICopyEvaluatorFactory[] args) throws AlgebricksException {
+        return new ICopyEvaluatorFactory() {
+
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException {
+
+                return new ICopyEvaluator() {
+
+                    private DataOutput out = output.getDataOutput();
+                    private ArrayBackedValueStorage argOut0 = new ArrayBackedValueStorage();
+                    private ArrayBackedValueStorage argOut1 = new ArrayBackedValueStorage();
+                    private ICopyEvaluator eval0 = args[0].createEvaluator(argOut0);
+                    private ICopyEvaluator eval1 = args[1].createEvaluator(argOut1);
+
+                    // possible output types
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ANULL);
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ABoolean> booleanSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ABOOLEAN);
+
+                    @Override
+                    public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
+                        argOut0.reset();
+                        eval0.evaluate(tuple);
+                        argOut1.reset();
+                        eval1.evaluate(tuple);
+
+                        try {
+                            if (argOut0.getByteArray()[0] == SER_NULL_TYPE_TAG
+                                    || argOut1.getByteArray()[0] == SER_NULL_TYPE_TAG) {
+                                nullSerde.serialize(ANull.NULL, out);
+                                return;
+                            }
+
+                            if (argOut0.getByteArray()[0] != SER_INTERVAL_TYPE_TAG
+                                    || argOut1.getByteArray()[0] != SER_INTERVAL_TYPE_TAG) {
+                                throw new AlgebricksException("Inapplicable input type for parameters: ("
+                                        + argOut0.getByteArray()[0] + ", " + argOut1.getByteArray()[0] + ")");
+                            }
+
+                            if (AIntervalSerializerDeserializer.getIntervalTimeType(argOut0.getByteArray(), 1) != AIntervalSerializerDeserializer
+                                    .getIntervalTimeType(argOut1.getByteArray(), 1)) {
+                                throw new AlgebricksException(
+                                        "Failed to compare to intervals with different internal time type.");
+                            }
+
+                            ABoolean res = (compareIntervals(
+                                    AIntervalSerializerDeserializer.getIntervalStart(argOut0.getByteArray(), 1),
+                                    AIntervalSerializerDeserializer.getIntervalEnd(argOut0.getByteArray(), 1),
+                                    AIntervalSerializerDeserializer.getIntervalStart(argOut1.getByteArray(), 1),
+                                    AIntervalSerializerDeserializer.getIntervalEnd(argOut1.getByteArray(), 1))) ? ABoolean.TRUE
+                                    : ABoolean.FALSE;
+
+                            booleanSerde.serialize(res, out);
+
+                        } catch (HyracksDataException hex) {
+                            throw new AlgebricksException(hex);
+                        }
+                    }
+                };
+            }
+        };
+    }
+
+    protected abstract boolean compareIntervals(long s1, long e1, long s2, long e2);
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/AddDateDurationDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/AddDateDurationDescriptor.java
new file mode 100644
index 0000000..7417f2b
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/AddDateDurationDescriptor.java
@@ -0,0 +1,150 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.functions.temporal;
+
+import java.io.DataOutput;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ADateSerializerDeserializer;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ADurationSerializerDeserializer;
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.ADate;
+import edu.uci.ics.asterix.om.base.AMutableDate;
+import edu.uci.ics.asterix.om.base.ANull;
+import edu.uci.ics.asterix.om.base.temporal.DurationArithmeticOperations;
+import edu.uci.ics.asterix.om.base.temporal.GregorianCalendarSystem;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.asterix.om.types.ATypeTag;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
+import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class AddDateDurationDescriptor extends AbstractScalarFunctionDynamicDescriptor {
+
+    private final static long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "add-date-duration", 2);
+
+    // allowed input types
+    private final static byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize();
+    private final static byte SER_DATE_TYPE_TAG = ATypeTag.DATE.serialize();
+    private final static byte SER_DURATION_TYPE_TAG = ATypeTag.DURATION.serialize();
+
+    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new AddDateDurationDescriptor();
+        }
+    };
+
+    @Override
+    public ICopyEvaluatorFactory createEvaluatorFactory(final ICopyEvaluatorFactory[] args) throws AlgebricksException {
+        return new ICopyEvaluatorFactory() {
+
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException {
+                return new ICopyEvaluator() {
+
+                    private DataOutput out = output.getDataOutput();
+                    private ArrayBackedValueStorage argOut0 = new ArrayBackedValueStorage();
+                    private ArrayBackedValueStorage argOut1 = new ArrayBackedValueStorage();
+                    private ICopyEvaluator eval0 = args[0].createEvaluator(argOut0);
+                    private ICopyEvaluator eval1 = args[1].createEvaluator(argOut1);
+
+                    // possible output types
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ANULL);
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ADate> dateSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ADATE);
+
+                    private AMutableDate aDate = new AMutableDate(0);
+
+                    @Override
+                    public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
+                        argOut0.reset();
+                        eval0.evaluate(tuple);
+                        argOut1.reset();
+                        eval1.evaluate(tuple);
+
+                        try {
+                            if (argOut0.getByteArray()[0] == SER_NULL_TYPE_TAG
+                                    || argOut1.getByteArray()[0] == SER_NULL_TYPE_TAG) {
+                                nullSerde.serialize(ANull.NULL, out);
+                                return;
+                            }
+
+                            if (argOut0.getByteArray()[0] != SER_DATE_TYPE_TAG) {
+                                throw new AlgebricksException(
+                                        "Inapplicable input type for parameter 0: expecting a Date ("
+                                                + SER_DATE_TYPE_TAG + ") or null (" + SER_NULL_TYPE_TAG
+                                                + "), but got: " + argOut0.getByteArray()[0]);
+                            }
+
+                            if (argOut1.getByteArray()[0] != SER_DURATION_TYPE_TAG) {
+                                throw new AlgebricksException(
+                                        "Inapplicable input type for parameter 1: expecting a Duration ("
+                                                + SER_DURATION_TYPE_TAG + ") or null (" + SER_NULL_TYPE_TAG
+                                                + "), but got: " + argOut1.getByteArray()[0]);
+                            }
+
+                            // get duration fields: yearMonth field and dayTime field
+                            int yearMonth = ADurationSerializerDeserializer.getYearMonth(argOut1.getByteArray(), 1);
+                            long dayTime = ADurationSerializerDeserializer.getDayTime(argOut1.getByteArray(), 1);
+
+                            // get date fields
+                            long datetimeChronon = ADateSerializerDeserializer.getChronon(argOut0.getByteArray(), 1)
+                                    * GregorianCalendarSystem.CHRONON_OF_DAY;
+
+                            datetimeChronon = DurationArithmeticOperations.addDuration(datetimeChronon, yearMonth,
+                                    dayTime);
+
+                            int dateChrononInDays = (int) (datetimeChronon / GregorianCalendarSystem.CHRONON_OF_DAY);
+                            if (dateChrononInDays < 0 && datetimeChronon % GregorianCalendarSystem.CHRONON_OF_DAY != 0) {
+                                dateChrononInDays -= 1;
+                            }
+
+                            aDate.setValue(dateChrononInDays);
+
+                            dateSerde.serialize(aDate, out);
+
+                        } catch (HyracksDataException hex) {
+                            throw new AlgebricksException(hex);
+                        }
+                    }
+                };
+            }
+        };
+    }
+
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/AddDatetimeDurationDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/AddDatetimeDurationDescriptor.java
new file mode 100644
index 0000000..4f04da3
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/AddDatetimeDurationDescriptor.java
@@ -0,0 +1,150 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.functions.temporal;
+
+import java.io.DataOutput;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ADateTimeSerializerDeserializer;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ADurationSerializerDeserializer;
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.ADateTime;
+import edu.uci.ics.asterix.om.base.AMutableDateTime;
+import edu.uci.ics.asterix.om.base.ANull;
+import edu.uci.ics.asterix.om.base.temporal.DurationArithmeticOperations;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.asterix.om.types.ATypeTag;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
+import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class AddDatetimeDurationDescriptor extends AbstractScalarFunctionDynamicDescriptor {
+
+    private final static long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "add-datetime-duration", 2);
+
+    // allowed input types
+    private final static byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize();
+    private final static byte SER_DATETIME_TYPE_TAG = ATypeTag.DATETIME.serialize();
+    private final static byte SER_DURATION_TYPE_TAG = ATypeTag.DURATION.serialize();
+
+    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new AddDatetimeDurationDescriptor();
+        }
+    };
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.runtime.base.IScalarFunctionDynamicDescriptor#createEvaluatorFactory(edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory[])
+     */
+    @Override
+    public ICopyEvaluatorFactory createEvaluatorFactory(final ICopyEvaluatorFactory[] args) throws AlgebricksException {
+        return new ICopyEvaluatorFactory() {
+
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException {
+                return new ICopyEvaluator() {
+
+                    private DataOutput out = output.getDataOutput();
+                    private ArrayBackedValueStorage argOut0 = new ArrayBackedValueStorage();
+                    private ArrayBackedValueStorage argOut1 = new ArrayBackedValueStorage();
+                    private ICopyEvaluator eval0 = args[0].createEvaluator(argOut0);
+                    private ICopyEvaluator eval1 = args[1].createEvaluator(argOut1);
+
+                    // possible output types
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ANULL);
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ADateTime> datetimeSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ADATETIME);
+
+                    private AMutableDateTime aDatetime = new AMutableDateTime(0);
+
+                    @Override
+                    public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
+                        argOut0.reset();
+                        eval0.evaluate(tuple);
+                        argOut1.reset();
+                        eval1.evaluate(tuple);
+
+                        try {
+                            if (argOut0.getByteArray()[0] == SER_NULL_TYPE_TAG
+                                    || argOut1.getByteArray()[0] == SER_NULL_TYPE_TAG) {
+                                nullSerde.serialize(ANull.NULL, out);
+                                return;
+                            }
+
+                            if (argOut0.getByteArray()[0] != SER_DATETIME_TYPE_TAG) {
+                                throw new AlgebricksException(
+                                        "Inapplicable input type for parameter 0: expecting a DateTime ("
+                                                + SER_DATETIME_TYPE_TAG + ") or null (" + SER_NULL_TYPE_TAG
+                                                + "), but got: " + argOut0.getByteArray()[0]);
+                            }
+
+                            if (argOut1.getByteArray()[0] != SER_DURATION_TYPE_TAG) {
+                                throw new AlgebricksException(
+                                        "Inapplicable input type for parameter 1: expecting a Duration ("
+                                                + SER_DURATION_TYPE_TAG + ") or null (" + SER_NULL_TYPE_TAG
+                                                + "), but got: " + argOut1.getByteArray()[0]);
+                            }
+
+                            // get duration fields: yearMonth field and dayTime field
+                            int yearMonth = ADurationSerializerDeserializer.getYearMonth(argOut1.getByteArray(), 1);
+                            long dayTime = ADurationSerializerDeserializer.getDayTime(argOut1.getByteArray(), 1);
+
+                            // get date fields
+                            long datetimeChronon = ADateTimeSerializerDeserializer
+                                    .getChronon(argOut0.getByteArray(), 1);
+
+                            datetimeChronon = DurationArithmeticOperations.addDuration(datetimeChronon, yearMonth,
+                                    dayTime);
+
+                            aDatetime.setValue(datetimeChronon);
+
+                            datetimeSerde.serialize(aDatetime, out);
+
+                        } catch (HyracksDataException hex) {
+                            throw new AlgebricksException(hex);
+                        }
+                    }
+                };
+            }
+        };
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.functions.IFunctionDescriptor#getIdentifier()
+     */
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/AddTimeDurationDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/AddTimeDurationDescriptor.java
new file mode 100644
index 0000000..e6b6ebd
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/AddTimeDurationDescriptor.java
@@ -0,0 +1,154 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.functions.temporal;
+
+import java.io.DataOutput;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ADurationSerializerDeserializer;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ATimeSerializerDeserializer;
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.AMutableTime;
+import edu.uci.ics.asterix.om.base.ANull;
+import edu.uci.ics.asterix.om.base.ATime;
+import edu.uci.ics.asterix.om.base.temporal.DurationArithmeticOperations;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.asterix.om.types.ATypeTag;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
+import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class AddTimeDurationDescriptor extends AbstractScalarFunctionDynamicDescriptor {
+
+    private final static long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "add-time-duration", 2);
+
+    // allowed input types
+    private final static byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize();
+    private final static byte SER_TIME_TYPE_TAG = ATypeTag.TIME.serialize();
+    private final static byte SER_DURATION_TYPE_TAG = ATypeTag.DURATION.serialize();
+
+    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new AddTimeDurationDescriptor();
+        }
+    };
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.runtime.base.IScalarFunctionDynamicDescriptor#createEvaluatorFactory(edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory[])
+     */
+    @Override
+    public ICopyEvaluatorFactory createEvaluatorFactory(final ICopyEvaluatorFactory[] args) throws AlgebricksException {
+        return new ICopyEvaluatorFactory() {
+
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException {
+                return new ICopyEvaluator() {
+
+                    private DataOutput out = output.getDataOutput();
+                    private ArrayBackedValueStorage argOut0 = new ArrayBackedValueStorage();
+                    private ArrayBackedValueStorage argOut1 = new ArrayBackedValueStorage();
+                    private ICopyEvaluator eval0 = args[0].createEvaluator(argOut0);
+                    private ICopyEvaluator eval1 = args[1].createEvaluator(argOut1);
+
+                    // possible output types
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ANULL);
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ATime> timeSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ATIME);
+
+                    private AMutableTime aTime = new AMutableTime(0);
+
+                    @Override
+                    public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
+                        argOut0.reset();
+                        eval0.evaluate(tuple);
+                        argOut1.reset();
+                        eval1.evaluate(tuple);
+
+                        try {
+                            if (argOut0.getByteArray()[0] == SER_NULL_TYPE_TAG
+                                    || argOut1.getByteArray()[0] == SER_NULL_TYPE_TAG) {
+                                nullSerde.serialize(ANull.NULL, out);
+                                return;
+                            }
+
+                            if (argOut0.getByteArray()[0] != SER_TIME_TYPE_TAG) {
+                                throw new AlgebricksException(
+                                        "Inapplicable input type for parameter 0: expecting a Time ("
+                                                + SER_TIME_TYPE_TAG + ") or null (" + SER_NULL_TYPE_TAG
+                                                + "), but got: " + argOut0.getByteArray()[0]);
+                            }
+
+                            if (argOut1.getByteArray()[0] != SER_DURATION_TYPE_TAG) {
+                                throw new AlgebricksException(
+                                        "Inapplicable input type for parameter 1: expecting a Duration ("
+                                                + SER_DURATION_TYPE_TAG + ") or null (" + SER_DURATION_TYPE_TAG
+                                                + "), but got: " + argOut1.getByteArray()[0]);
+                            }
+
+                            // get duration fields: yearMonth field and dayTime field
+                            int yearMonth = ADurationSerializerDeserializer.getYearMonth(argOut1.getByteArray(), 1);
+
+                            // cannot add a year-month duration to a time value
+                            if (yearMonth != 0) {
+                                throw new AlgebricksException("ATime cannot be added by a year-month duration.");
+                            }
+
+                            long dayTime = ADurationSerializerDeserializer.getDayTime(argOut1.getByteArray(), 1);
+
+                            // get time fields
+                            int timeChronon = ATimeSerializerDeserializer.getChronon(argOut0.getByteArray(), 1);
+
+                            timeChronon = DurationArithmeticOperations.addDuration(timeChronon, dayTime);
+
+                            aTime.setValue(timeChronon);
+
+                            timeSerde.serialize(aTime, out);
+
+                        } catch (HyracksDataException hex) {
+                            throw new AlgebricksException(hex);
+                        }
+                    }
+                };
+            }
+        };
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.functions.IFunctionDescriptor#getIdentifier()
+     */
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/AdjustDateTimeForTimeZoneDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/AdjustDateTimeForTimeZoneDescriptor.java
new file mode 100644
index 0000000..fb01e97
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/AdjustDateTimeForTimeZoneDescriptor.java
@@ -0,0 +1,154 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.functions.temporal;
+
+import java.io.DataOutput;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ADateTimeSerializerDeserializer;
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.ANull;
+import edu.uci.ics.asterix.om.base.temporal.ATimeParserFactory;
+import edu.uci.ics.asterix.om.base.temporal.ByteArrayCharSequenceAccessor;
+import edu.uci.ics.asterix.om.base.temporal.GregorianCalendarSystem;
+import edu.uci.ics.asterix.om.base.temporal.GregorianCalendarSystem.Fields;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.asterix.om.types.ATypeTag;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
+import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class AdjustDateTimeForTimeZoneDescriptor extends AbstractScalarFunctionDynamicDescriptor {
+
+    private final static long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "adjust-datetime-for-timezone", 2);
+
+    // allowed input types
+    private final static byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize();
+    private final static byte SER_DATETIME_TYPE_TAG = ATypeTag.DATETIME.serialize();
+    private final static byte SER_STRING_TYPE_TAG = ATypeTag.STRING.serialize();
+
+    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new AdjustDateTimeForTimeZoneDescriptor();
+        }
+    };
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.runtime.base.IScalarFunctionDynamicDescriptor#createEvaluatorFactory(edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory[])
+     */
+    @Override
+    public ICopyEvaluatorFactory createEvaluatorFactory(final ICopyEvaluatorFactory[] args) throws AlgebricksException {
+        return new ICopyEvaluatorFactory() {
+
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException {
+                return new ICopyEvaluator() {
+
+                    private DataOutput out = output.getDataOutput();
+                    private ArrayBackedValueStorage argOut0 = new ArrayBackedValueStorage();
+                    private ArrayBackedValueStorage argOut1 = new ArrayBackedValueStorage();
+                    private ICopyEvaluator eval0 = args[0].createEvaluator(argOut0);
+                    private ICopyEvaluator eval1 = args[1].createEvaluator(argOut1);
+
+                    // possible output types
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ANULL);
+
+                    private ByteArrayCharSequenceAccessor charAccessor = new ByteArrayCharSequenceAccessor();
+
+                    private GregorianCalendarSystem calInstance = GregorianCalendarSystem.getInstance();
+
+                    @Override
+                    public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
+                        argOut0.reset();
+                        eval0.evaluate(tuple);
+                        argOut1.reset();
+                        eval1.evaluate(tuple);
+
+                        try {
+                            if (argOut0.getByteArray()[0] == SER_NULL_TYPE_TAG
+                                    || argOut1.getByteArray()[0] == SER_NULL_TYPE_TAG) {
+                                nullSerde.serialize(ANull.NULL, out);
+                                return;
+                            }
+
+                            if (argOut0.getByteArray()[0] != SER_DATETIME_TYPE_TAG) {
+                                throw new AlgebricksException(
+                                        "Inapplicable input type for parameter 0: expecting a Datetime, but got: "
+                                                + argOut0.getByteArray()[0]);
+                            }
+
+                            if (argOut1.getByteArray()[0] != SER_STRING_TYPE_TAG) {
+                                throw new AlgebricksException(
+                                        "Inapplicable input type for parameter 0: expecting a String, but got: "
+                                                + argOut1.getByteArray()[0]);
+                            }
+
+                            int stringLength = (argOut1.getByteArray()[1] & 0xff << 8)
+                                    + (argOut1.getByteArray()[2] & 0xff << 0);
+
+                            charAccessor.reset(argOut1.getByteArray(), 3, stringLength);
+
+                            int timezone = ATimeParserFactory.parseTimezonePart(charAccessor, 0);
+
+                            if (!calInstance.validateTimeZone(timezone)) {
+                                throw new AlgebricksException("Wrong format for a time zone string!");
+                            }
+
+                            long chronon = ADateTimeSerializerDeserializer.getChronon(argOut0.getByteArray(), 1);
+
+                            chronon = calInstance.adjustChrononByTimezone(chronon, timezone);
+
+                            StringBuilder sbder = new StringBuilder();
+
+                            calInstance.getExtendStringRepWithTimezoneUntilField(chronon, timezone, sbder, Fields.YEAR,
+                                    Fields.MILLISECOND);
+
+                            out.writeByte(SER_STRING_TYPE_TAG);
+                            out.writeUTF(sbder.toString());
+
+                        } catch (Exception e1) {
+                            throw new AlgebricksException(e1);
+                        }
+                    }
+                };
+            }
+        };
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.functions.IFunctionDescriptor#getIdentifier()
+     */
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/AdjustTimeForTimeZoneDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/AdjustTimeForTimeZoneDescriptor.java
new file mode 100644
index 0000000..1323664
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/AdjustTimeForTimeZoneDescriptor.java
@@ -0,0 +1,154 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.functions.temporal;
+
+import java.io.DataOutput;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ATimeSerializerDeserializer;
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.ANull;
+import edu.uci.ics.asterix.om.base.temporal.ATimeParserFactory;
+import edu.uci.ics.asterix.om.base.temporal.ByteArrayCharSequenceAccessor;
+import edu.uci.ics.asterix.om.base.temporal.GregorianCalendarSystem;
+import edu.uci.ics.asterix.om.base.temporal.GregorianCalendarSystem.Fields;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.asterix.om.types.ATypeTag;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
+import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class AdjustTimeForTimeZoneDescriptor extends AbstractScalarFunctionDynamicDescriptor {
+
+    private final static long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "adjust-time-for-timezone", 2);
+
+    // allowed input types
+    private final static byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize();
+    private final static byte SER_TIME_TYPE_TAG = ATypeTag.TIME.serialize();
+    private final static byte SER_STRING_TYPE_TAG = ATypeTag.STRING.serialize();
+
+    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new AdjustTimeForTimeZoneDescriptor();
+        }
+    };
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.runtime.base.IScalarFunctionDynamicDescriptor#createEvaluatorFactory(edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory[])
+     */
+    @Override
+    public ICopyEvaluatorFactory createEvaluatorFactory(final ICopyEvaluatorFactory[] args) throws AlgebricksException {
+        return new ICopyEvaluatorFactory() {
+
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException {
+                return new ICopyEvaluator() {
+
+                    private DataOutput out = output.getDataOutput();
+                    private ArrayBackedValueStorage argOut0 = new ArrayBackedValueStorage();
+                    private ArrayBackedValueStorage argOut1 = new ArrayBackedValueStorage();
+                    private ICopyEvaluator eval0 = args[0].createEvaluator(argOut0);
+                    private ICopyEvaluator eval1 = args[1].createEvaluator(argOut1);
+
+                    // possible output types
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ANULL);
+
+                    private ByteArrayCharSequenceAccessor charAccessor = new ByteArrayCharSequenceAccessor();
+
+                    private GregorianCalendarSystem calInstance = GregorianCalendarSystem.getInstance();
+
+                    @Override
+                    public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
+                        argOut0.reset();
+                        eval0.evaluate(tuple);
+                        argOut1.reset();
+                        eval1.evaluate(tuple);
+
+                        try {
+                            if (argOut0.getByteArray()[0] == SER_NULL_TYPE_TAG
+                                    || argOut1.getByteArray()[0] == SER_NULL_TYPE_TAG) {
+                                nullSerde.serialize(ANull.NULL, out);
+                                return;
+                            }
+
+                            if (argOut0.getByteArray()[0] != SER_TIME_TYPE_TAG) {
+                                throw new AlgebricksException(
+                                        "Inapplicable input type for parameter 0: expecting a Time, but got: "
+                                                + argOut0.getByteArray()[0]);
+                            }
+
+                            if (argOut1.getByteArray()[0] != SER_STRING_TYPE_TAG) {
+                                throw new AlgebricksException(
+                                        "Inapplicable input type for parameter 0: expecting a String, but got: "
+                                                + argOut1.getByteArray()[0]);
+                            }
+
+                            int stringLength = (argOut0.getByteArray()[1] & 0xff << 8)
+                                    + (argOut0.getByteArray()[2] & 0xff << 0);
+
+                            charAccessor.reset(argOut1.getByteArray(), 3, stringLength);
+
+                            int timezone = ATimeParserFactory.parseTimezonePart(charAccessor, 0);
+
+                            if (!calInstance.validateTimeZone(timezone)) {
+                                throw new AlgebricksException("Wrong format for a time zone string!");
+                            }
+
+                            int chronon = ATimeSerializerDeserializer.getChronon(argOut0.getByteArray(), 1);
+
+                            chronon = (int) calInstance.adjustChrononByTimezone(chronon, timezone);
+
+                            StringBuilder sbder = new StringBuilder();
+
+                            calInstance.getExtendStringRepWithTimezoneUntilField(chronon, timezone, sbder, Fields.HOUR,
+                                    Fields.MILLISECOND);
+
+                            out.writeByte(SER_STRING_TYPE_TAG);
+                            out.writeUTF(sbder.toString());
+
+                        } catch (Exception e1) {
+                            throw new AlgebricksException(e1);
+                        }
+                    }
+                };
+            }
+        };
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.functions.IFunctionDescriptor#getIdentifier()
+     */
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/CalendarDuartionFromDateDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/CalendarDuartionFromDateDescriptor.java
new file mode 100644
index 0000000..c6be030
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/CalendarDuartionFromDateDescriptor.java
@@ -0,0 +1,235 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.functions.temporal;
+
+import java.io.DataOutput;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ADateSerializerDeserializer;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ADurationSerializerDeserializer;
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.ADuration;
+import edu.uci.ics.asterix.om.base.AMutableDuration;
+import edu.uci.ics.asterix.om.base.ANull;
+import edu.uci.ics.asterix.om.base.temporal.DurationArithmeticOperations;
+import edu.uci.ics.asterix.om.base.temporal.GregorianCalendarSystem;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.asterix.om.types.ATypeTag;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
+import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class CalendarDuartionFromDateDescriptor extends AbstractScalarFunctionDynamicDescriptor {
+
+    private final static long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "calendar-duration-from-date", 2);
+
+    // allowed input types
+    private final static byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize();
+    private final static byte SER_DATE_TYPE_TAG = ATypeTag.DATE.serialize();
+    private final static byte SER_DURATION_TYPE_TAG = ATypeTag.DURATION.serialize();
+
+    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new CalendarDuartionFromDateDescriptor();
+        }
+    };
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.runtime.base.IScalarFunctionDynamicDescriptor#createEvaluatorFactory(edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory[])
+     */
+    @Override
+    public ICopyEvaluatorFactory createEvaluatorFactory(final ICopyEvaluatorFactory[] args) throws AlgebricksException {
+        return new ICopyEvaluatorFactory() {
+
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException {
+
+                return new ICopyEvaluator() {
+
+                    private DataOutput out = output.getDataOutput();
+                    private ArrayBackedValueStorage argOut0 = new ArrayBackedValueStorage();
+                    private ArrayBackedValueStorage argOut1 = new ArrayBackedValueStorage();
+                    private ICopyEvaluator eval0 = args[0].createEvaluator(argOut0);
+                    private ICopyEvaluator eval1 = args[1].createEvaluator(argOut1);
+
+                    // possible output types
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ANULL);
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ADuration> durationSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ADURATION);
+
+                    private AMutableDuration aDuration = new AMutableDuration(0, 0);
+
+                    private GregorianCalendarSystem calInstanct = GregorianCalendarSystem.getInstance();
+
+                    @Override
+                    public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
+
+                        argOut0.reset();
+                        eval0.evaluate(tuple);
+                        argOut1.reset();
+                        eval1.evaluate(tuple);
+
+                        try {
+                            if (argOut0.getByteArray()[0] == SER_NULL_TYPE_TAG
+                                    || argOut1.getByteArray()[0] == SER_NULL_TYPE_TAG) {
+                                nullSerde.serialize(ANull.NULL, out);
+                                return;
+                            }
+
+                            if (argOut0.getByteArray()[0] != SER_DATE_TYPE_TAG) {
+                                throw new AlgebricksException(
+                                        "Inapplicable input type for parameter 0: expecting a Date, but got: "
+                                                + argOut0.getByteArray()[0]);
+                            }
+
+                            if (argOut1.getByteArray()[0] != SER_DURATION_TYPE_TAG) {
+                                throw new AlgebricksException(
+                                        "Inapplicable input type for parameter 1: expecting a Date, but got: "
+                                                + argOut1.getByteArray()[0]);
+                            }
+
+                            int yearMonthDurationInMonths = ADurationSerializerDeserializer.getYearMonth(
+                                    argOut1.getByteArray(), 1);
+                            long dayTimeDurationInMs = ADurationSerializerDeserializer.getDayTime(
+                                    argOut1.getByteArray(), 1);
+
+                            long startingTimePoint = ADateSerializerDeserializer.getChronon(argOut0.getByteArray(), 1)
+                                    * GregorianCalendarSystem.CHRONON_OF_DAY;
+
+                            long endingTimePoint = DurationArithmeticOperations.addDuration(startingTimePoint,
+                                    yearMonthDurationInMonths, dayTimeDurationInMs);
+
+                            if (startingTimePoint == endingTimePoint) {
+                                aDuration.setValue(0, 0);
+                            } else {
+
+                                boolean negative = false;
+
+                                if (endingTimePoint < startingTimePoint) {
+                                    negative = true;
+                                    // swap the starting and ending time, so that ending time is always larger than the starting time.
+                                    long tmpTime = endingTimePoint;
+                                    endingTimePoint = startingTimePoint;
+                                    startingTimePoint = tmpTime;
+                                }
+
+                                int year0 = calInstanct.getYear(startingTimePoint);
+                                int month0 = calInstanct.getMonthOfYear(startingTimePoint, year0);
+
+                                int year1 = calInstanct.getYear(endingTimePoint);
+                                int month1 = calInstanct.getMonthOfYear(endingTimePoint, year1);
+
+                                int year = year1 - year0;
+                                int month = month1 - month0;
+                                int day = calInstanct.getDayOfMonthYear(endingTimePoint, year1, month1)
+                                        - calInstanct.getDayOfMonthYear(startingTimePoint, year0, month0);
+                                int hour = calInstanct.getHourOfDay(endingTimePoint)
+                                        - calInstanct.getHourOfDay(startingTimePoint);
+                                int min = calInstanct.getMinOfHour(endingTimePoint)
+                                        - calInstanct.getMinOfHour(startingTimePoint);
+                                int sec = calInstanct.getSecOfMin(endingTimePoint)
+                                        - calInstanct.getSecOfMin(startingTimePoint);
+                                int ms = calInstanct.getMillisOfSec(endingTimePoint)
+                                        - calInstanct.getMillisOfSec(startingTimePoint);
+
+                                if (ms < 0) {
+                                    ms += GregorianCalendarSystem.CHRONON_OF_SECOND;
+                                    sec -= 1;
+                                }
+
+                                if (sec < 0) {
+                                    sec += GregorianCalendarSystem.CHRONON_OF_MINUTE
+                                            / GregorianCalendarSystem.CHRONON_OF_SECOND;
+                                    min -= 1;
+                                }
+
+                                if (min < 0) {
+                                    min += GregorianCalendarSystem.CHRONON_OF_HOUR
+                                            / GregorianCalendarSystem.CHRONON_OF_MINUTE;
+                                    hour -= 1;
+                                }
+
+                                if (hour < 0) {
+                                    hour += GregorianCalendarSystem.CHRONON_OF_DAY
+                                            / GregorianCalendarSystem.CHRONON_OF_HOUR;
+                                    day -= 1;
+                                }
+
+                                if (day < 0) {
+                                    boolean isLeapYear = calInstanct.isLeapYear(year0);
+                                    day += (isLeapYear) ? (GregorianCalendarSystem.DAYS_OF_MONTH_LEAP[month0 - 1])
+                                            : (GregorianCalendarSystem.DAYS_OF_MONTH_ORDI[month0 - 1]);
+                                    month -= 1;
+                                }
+
+                                if (month < 0) {
+                                    month += GregorianCalendarSystem.MONTHS_IN_A_YEAR;
+                                    year -= 1;
+                                }
+
+                                if (negative) {
+                                    aDuration.setValue(-1 * (year * GregorianCalendarSystem.MONTHS_IN_A_YEAR + month),
+                                            -1
+                                                    * (day * GregorianCalendarSystem.CHRONON_OF_DAY + hour
+                                                            * GregorianCalendarSystem.CHRONON_OF_HOUR + min
+                                                            * GregorianCalendarSystem.CHRONON_OF_MINUTE + sec
+                                                            * GregorianCalendarSystem.CHRONON_OF_SECOND + ms));
+                                } else {
+                                    aDuration.setValue(year * GregorianCalendarSystem.MONTHS_IN_A_YEAR + month, day
+                                            * GregorianCalendarSystem.CHRONON_OF_DAY + hour
+                                            * GregorianCalendarSystem.CHRONON_OF_HOUR + min
+                                            * GregorianCalendarSystem.CHRONON_OF_MINUTE + sec
+                                            * GregorianCalendarSystem.CHRONON_OF_SECOND + ms);
+                                }
+                            }
+
+                            durationSerde.serialize(aDuration, out);
+
+                        } catch (HyracksDataException hex) {
+                            throw new AlgebricksException(hex);
+                        }
+                    }
+                };
+            }
+        };
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.functions.IFunctionDescriptor#getIdentifier()
+     */
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/CalendarDurationFromDateTimeDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/CalendarDurationFromDateTimeDescriptor.java
new file mode 100644
index 0000000..2c7a9a7
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/CalendarDurationFromDateTimeDescriptor.java
@@ -0,0 +1,251 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.functions.temporal;
+
+import java.io.DataOutput;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ADateTimeSerializerDeserializer;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ADurationSerializerDeserializer;
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.ADuration;
+import edu.uci.ics.asterix.om.base.AMutableDuration;
+import edu.uci.ics.asterix.om.base.ANull;
+import edu.uci.ics.asterix.om.base.temporal.DurationArithmeticOperations;
+import edu.uci.ics.asterix.om.base.temporal.GregorianCalendarSystem;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.asterix.om.types.ATypeTag;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
+import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+/**
+ * This function converts a given duration into a "human-readable" duration containing both year-month and day-time
+ * duration parts, by re-organizing values between the duration fields from the given reference time point.
+ * <p/>
+ * The basic algorithm for this convert is simple: <br/>
+ * 1. Calculate the time point by adding the given duration to the given time point;<br/>
+ * 2. Calculate the differences by fields between two different time points;<br/>
+ * 3. Re-format the duration into a human-readable one.
+ * <p/>
+ * Here "human-readable" means the value of each field of the duration is within the value range of the field in the
+ * calendar system. For example, month would be in [0, 12), and hour would be in [0, 24).
+ * <p/>
+ * The result can be considered as a "field-based" difference between the two datetime value, but all negative values
+ * would be converted to be non-negative.
+ * <p/>
+ * In the implementation, we always do the subtraction from the later time point, resulting a positive duration always.
+ * <p/>
+ */
+public class CalendarDurationFromDateTimeDescriptor extends AbstractScalarFunctionDynamicDescriptor {
+
+    private final static long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "calendar-duration-from-datetime", 2);
+
+    // allowed input types
+    private final static byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize();
+    private final static byte SER_DATETIME_TYPE_TAG = ATypeTag.DATETIME.serialize();
+    private final static byte SER_DURATION_TYPE_TAG = ATypeTag.DURATION.serialize();
+
+    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new CalendarDurationFromDateTimeDescriptor();
+        }
+    };
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.runtime.base.IScalarFunctionDynamicDescriptor#createEvaluatorFactory(edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory[])
+     */
+    @Override
+    public ICopyEvaluatorFactory createEvaluatorFactory(final ICopyEvaluatorFactory[] args) throws AlgebricksException {
+        return new ICopyEvaluatorFactory() {
+
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException {
+                return new ICopyEvaluator() {
+
+                    private DataOutput out = output.getDataOutput();
+                    private ArrayBackedValueStorage argOut0 = new ArrayBackedValueStorage();
+                    private ArrayBackedValueStorage argOut1 = new ArrayBackedValueStorage();
+                    private ICopyEvaluator eval0 = args[0].createEvaluator(argOut0);
+                    private ICopyEvaluator eval1 = args[1].createEvaluator(argOut1);
+
+                    // possible output types
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ANULL);
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ADuration> durationSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ADURATION);
+
+                    private AMutableDuration aDuration = new AMutableDuration(0, 0);
+
+                    private GregorianCalendarSystem calInstanct = GregorianCalendarSystem.getInstance();
+
+                    @Override
+                    public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
+                        argOut0.reset();
+                        eval0.evaluate(tuple);
+                        argOut1.reset();
+                        eval1.evaluate(tuple);
+
+                        try {
+                            if (argOut0.getByteArray()[0] == SER_NULL_TYPE_TAG
+                                    || argOut1.getByteArray()[0] == SER_NULL_TYPE_TAG) {
+                                nullSerde.serialize(ANull.NULL, out);
+                                return;
+                            }
+
+                            if (argOut0.getByteArray()[0] != SER_DATETIME_TYPE_TAG) {
+                                throw new AlgebricksException(
+                                        "Inapplicable input type for parameter 0: expecting ADateTime, but got: "
+                                                + argOut0.getByteArray()[0]);
+                            }
+
+                            if (argOut1.getByteArray()[0] != SER_DURATION_TYPE_TAG) {
+                                throw new AlgebricksException(
+                                        "Inapplicable input type for parameter 1: expecting ADateTime, but got: "
+                                                + argOut1.getByteArray()[0]);
+                            }
+
+                            int yearMonthDurationInMonths = ADurationSerializerDeserializer.getYearMonth(
+                                    argOut1.getByteArray(), 1);
+                            long dayTimeDurationInMs = ADurationSerializerDeserializer.getDayTime(
+                                    argOut1.getByteArray(), 1);
+
+                            long startingTimePoint = ADateTimeSerializerDeserializer.getChronon(argOut0.getByteArray(),
+                                    1);
+
+                            long endingTimePoint = DurationArithmeticOperations.addDuration(startingTimePoint,
+                                    yearMonthDurationInMonths, dayTimeDurationInMs);
+
+                            if (startingTimePoint == endingTimePoint) {
+                                aDuration.setValue(0, 0);
+                            } else {
+
+                                boolean negative = false;
+
+                                if (endingTimePoint < startingTimePoint) {
+                                    negative = true;
+                                    // swap the starting and ending time, so that ending time is always larger than the starting time.
+                                    long tmpTime = endingTimePoint;
+                                    endingTimePoint = startingTimePoint;
+                                    startingTimePoint = tmpTime;
+                                }
+
+                                int year0 = calInstanct.getYear(startingTimePoint);
+                                int month0 = calInstanct.getMonthOfYear(startingTimePoint, year0);
+
+                                int year1 = calInstanct.getYear(endingTimePoint);
+                                int month1 = calInstanct.getMonthOfYear(endingTimePoint, year1);
+
+                                int year = year1 - year0;
+                                int month = month1 - month0;
+                                int day = calInstanct.getDayOfMonthYear(endingTimePoint, year1, month1)
+                                        - calInstanct.getDayOfMonthYear(startingTimePoint, year0, month0);
+                                int hour = calInstanct.getHourOfDay(endingTimePoint)
+                                        - calInstanct.getHourOfDay(startingTimePoint);
+                                int min = calInstanct.getMinOfHour(endingTimePoint)
+                                        - calInstanct.getMinOfHour(startingTimePoint);
+                                int sec = calInstanct.getSecOfMin(endingTimePoint)
+                                        - calInstanct.getSecOfMin(startingTimePoint);
+                                int ms = calInstanct.getMillisOfSec(endingTimePoint)
+                                        - calInstanct.getMillisOfSec(startingTimePoint);
+
+                                if (ms < 0) {
+                                    ms += GregorianCalendarSystem.CHRONON_OF_SECOND;
+                                    sec -= 1;
+                                }
+
+                                if (sec < 0) {
+                                    sec += GregorianCalendarSystem.CHRONON_OF_MINUTE
+                                            / GregorianCalendarSystem.CHRONON_OF_SECOND;
+                                    min -= 1;
+                                }
+
+                                if (min < 0) {
+                                    min += GregorianCalendarSystem.CHRONON_OF_HOUR
+                                            / GregorianCalendarSystem.CHRONON_OF_MINUTE;
+                                    hour -= 1;
+                                }
+
+                                if (hour < 0) {
+                                    hour += GregorianCalendarSystem.CHRONON_OF_DAY
+                                            / GregorianCalendarSystem.CHRONON_OF_HOUR;
+                                    day -= 1;
+                                }
+
+                                if (day < 0) {
+                                    boolean isLeapYear = calInstanct.isLeapYear(year0);
+                                    day += (isLeapYear) ? (GregorianCalendarSystem.DAYS_OF_MONTH_LEAP[month0 - 1])
+                                            : (GregorianCalendarSystem.DAYS_OF_MONTH_ORDI[month0 - 1]);
+                                    month -= 1;
+                                }
+
+                                if (month < 0) {
+                                    month += GregorianCalendarSystem.MONTHS_IN_A_YEAR;
+                                    year -= 1;
+                                }
+
+                                if (negative) {
+                                    aDuration.setValue(-1 * (year * GregorianCalendarSystem.MONTHS_IN_A_YEAR + month),
+                                            -1
+                                                    * (day * GregorianCalendarSystem.CHRONON_OF_DAY + hour
+                                                            * GregorianCalendarSystem.CHRONON_OF_HOUR + min
+                                                            * GregorianCalendarSystem.CHRONON_OF_MINUTE + sec
+                                                            * GregorianCalendarSystem.CHRONON_OF_SECOND + ms));
+                                } else {
+                                    aDuration.setValue(year * GregorianCalendarSystem.MONTHS_IN_A_YEAR + month, day
+                                            * GregorianCalendarSystem.CHRONON_OF_DAY + hour
+                                            * GregorianCalendarSystem.CHRONON_OF_HOUR + min
+                                            * GregorianCalendarSystem.CHRONON_OF_MINUTE + sec
+                                            * GregorianCalendarSystem.CHRONON_OF_SECOND + ms);
+                                }
+                            }
+
+                            durationSerde.serialize(aDuration, out);
+
+                        } catch (HyracksDataException hex) {
+                            throw new AlgebricksException(hex);
+                        }
+                    }
+                };
+            }
+        };
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.functions.IFunctionDescriptor#getIdentifier()
+     */
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/CurrentDateDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/CurrentDateDescriptor.java
new file mode 100644
index 0000000..0cb47b5
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/CurrentDateDescriptor.java
@@ -0,0 +1,88 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.functions.temporal;
+
+import java.io.DataOutput;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.ADate;
+import edu.uci.ics.asterix.om.base.AMutableDate;
+import edu.uci.ics.asterix.om.base.temporal.GregorianCalendarSystem;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class CurrentDateDescriptor extends AbstractScalarFunctionDynamicDescriptor {
+
+    private static final long serialVersionUID = 1L;
+    private final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "current-date",
+            0);
+
+    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new CurrentDateDescriptor();
+        }
+    };
+
+    @Override
+    public ICopyEvaluatorFactory createEvaluatorFactory(ICopyEvaluatorFactory[] args) throws AlgebricksException {
+        return new ICopyEvaluatorFactory() {
+
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException {
+                return new ICopyEvaluator() {
+
+                    private DataOutput out = output.getDataOutput();
+
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ADate> dateSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ADATE);
+                    private AMutableDate aDate = new AMutableDate(0);
+
+                    @Override
+                    public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
+                        try {
+                            int dateChronon = (int) (System.currentTimeMillis() / GregorianCalendarSystem.CHRONON_OF_DAY);
+                            aDate.setValue(dateChronon);
+                            dateSerde.serialize(aDate, out);
+                        } catch (HyracksDataException hex) {
+                            throw new AlgebricksException(hex);
+                        }
+                    }
+                };
+            }
+        };
+    }
+
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/CurrentDateTimeDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/CurrentDateTimeDescriptor.java
new file mode 100644
index 0000000..9209cae
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/CurrentDateTimeDescriptor.java
@@ -0,0 +1,92 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.functions.temporal;
+
+import java.io.DataOutput;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.ADateTime;
+import edu.uci.ics.asterix.om.base.AMutableDateTime;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class CurrentDateTimeDescriptor extends AbstractScalarFunctionDynamicDescriptor {
+
+    private static final long serialVersionUID = 1L;
+    private final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "current-datetime", 0);
+
+    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new CurrentDateTimeDescriptor();
+        }
+    };
+
+    private CurrentDateTimeDescriptor() {
+    }
+
+    @Override
+    public ICopyEvaluatorFactory createEvaluatorFactory(ICopyEvaluatorFactory[] args) throws AlgebricksException {
+        return new ICopyEvaluatorFactory() {
+
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException {
+                return new ICopyEvaluator() {
+
+                    private DataOutput out = output.getDataOutput();
+
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ADateTime> datetimeSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ADATETIME);
+                    private AMutableDateTime aDateTime = new AMutableDateTime(0);
+
+                    @Override
+                    public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
+                        try {
+                            aDateTime.setValue(System.currentTimeMillis());
+                            datetimeSerde.serialize(aDateTime, out);
+                        } catch (HyracksDataException hex) {
+                            throw new AlgebricksException(hex);
+                        }
+                    }
+                };
+            }
+        };
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.functions.IFunctionDescriptor#getIdentifier()
+     */
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/CurrentTimeDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/CurrentTimeDescriptor.java
new file mode 100644
index 0000000..c7078b9
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/CurrentTimeDescriptor.java
@@ -0,0 +1,93 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.functions.temporal;
+
+import java.io.DataOutput;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.AMutableTime;
+import edu.uci.ics.asterix.om.base.ATime;
+import edu.uci.ics.asterix.om.base.temporal.GregorianCalendarSystem;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class CurrentTimeDescriptor extends AbstractScalarFunctionDynamicDescriptor {
+
+    private static final long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "current-time", 0);
+
+    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new CurrentTimeDescriptor();
+        }
+    };
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.runtime.base.IScalarFunctionDynamicDescriptor#createEvaluatorFactory(edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory[])
+     */
+    @Override
+    public ICopyEvaluatorFactory createEvaluatorFactory(ICopyEvaluatorFactory[] args) throws AlgebricksException {
+        return new ICopyEvaluatorFactory() {
+
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException {
+                return new ICopyEvaluator() {
+
+                    private DataOutput out = output.getDataOutput();
+
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ATime> timeSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ATIME);
+                    private AMutableTime aTime = new AMutableTime(0);
+
+                    @Override
+                    public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
+                        try {
+                            int timeChronon = (int) (System.currentTimeMillis() % GregorianCalendarSystem.CHRONON_OF_DAY);
+                            aTime.setValue(timeChronon);
+                            timeSerde.serialize(aTime, out);
+                        } catch (HyracksDataException hex) {
+                            throw new AlgebricksException(hex);
+                        }
+                    }
+                };
+            }
+        };
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.functions.IFunctionDescriptor#getIdentifier()
+     */
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/DateFromDatetimeDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/DateFromDatetimeDescriptor.java
new file mode 100644
index 0000000..4ef52d9
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/DateFromDatetimeDescriptor.java
@@ -0,0 +1,108 @@
+package edu.uci.ics.asterix.runtime.evaluators.functions.temporal;
+
+import java.io.DataOutput;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ADateTimeSerializerDeserializer;
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.ADate;
+import edu.uci.ics.asterix.om.base.AMutableDate;
+import edu.uci.ics.asterix.om.base.ANull;
+import edu.uci.ics.asterix.om.base.temporal.GregorianCalendarSystem;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.asterix.om.types.ATypeTag;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
+import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class DateFromDatetimeDescriptor extends AbstractScalarFunctionDynamicDescriptor {
+
+    private static final long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "date-from-datetime", 1);
+
+    // allowed input types
+    private final static byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize();
+    private final static byte SER_DATETIME_TYPE_TAG = ATypeTag.DATETIME.serialize();
+
+    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new DateFromDatetimeDescriptor();
+        }
+
+    };
+
+    @Override
+    public ICopyEvaluatorFactory createEvaluatorFactory(final ICopyEvaluatorFactory[] args) throws AlgebricksException {
+        return new ICopyEvaluatorFactory() {
+
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException {
+                return new ICopyEvaluator() {
+
+                    private DataOutput out = output.getDataOutput();
+                    private ArrayBackedValueStorage argOut = new ArrayBackedValueStorage();
+                    private ICopyEvaluator eval = args[0].createEvaluator(argOut);
+
+                    // possible returning types
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ADate> dateSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ADATE);
+                    private AMutableDate aDate = new AMutableDate(0);
+
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ANULL);
+
+                    @Override
+                    public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
+                        argOut.reset();
+                        eval.evaluate(tuple);
+                        try {
+                            if (argOut.getByteArray()[0] == SER_NULL_TYPE_TAG) {
+                                nullSerde.serialize(ANull.NULL, out);
+                            } else {
+                                if (argOut.getByteArray()[0] != SER_DATETIME_TYPE_TAG) {
+                                    throw new AlgebricksException(
+                                            "Inapplicable input type for function date_from_datetime: expecting ADateTime ("
+                                                    + SER_DATETIME_TYPE_TAG + ") or null (" + SER_NULL_TYPE_TAG
+                                                    + "), but got: " + argOut.getByteArray()[0]);
+                                }
+                                long datetimeChronon = ADateTimeSerializerDeserializer.getChronon(
+                                        argOut.getByteArray(), 1);
+                                int dateChrononInDays = (int) (datetimeChronon / GregorianCalendarSystem.CHRONON_OF_DAY);
+                                if (dateChrononInDays < 0
+                                        && datetimeChronon % GregorianCalendarSystem.CHRONON_OF_DAY != 0) {
+                                    dateChrononInDays -= 1;
+                                }
+                                aDate.setValue(dateChrononInDays);
+                                dateSerde.serialize(aDate, out);
+                            }
+                        } catch (HyracksDataException hex) {
+                            throw new AlgebricksException(hex);
+                        }
+                    }
+                };
+            }
+        };
+    }
+
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/DateFromUnixTimeInDaysDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/DateFromUnixTimeInDaysDescriptor.java
new file mode 100644
index 0000000..6b78a35
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/DateFromUnixTimeInDaysDescriptor.java
@@ -0,0 +1,121 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.functions.temporal;
+
+import java.io.DataOutput;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AInt16SerializerDeserializer;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AInt32SerializerDeserializer;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AInt8SerializerDeserializer;
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.ADate;
+import edu.uci.ics.asterix.om.base.AMutableDate;
+import edu.uci.ics.asterix.om.base.ANull;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.asterix.om.types.ATypeTag;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
+import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class DateFromUnixTimeInDaysDescriptor extends AbstractScalarFunctionDynamicDescriptor {
+
+    private final static long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "date-from-unix-time-in-days", 1);
+
+    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new DateFromUnixTimeInDaysDescriptor();
+        }
+    };
+
+    @Override
+    public ICopyEvaluatorFactory createEvaluatorFactory(final ICopyEvaluatorFactory[] args) throws AlgebricksException {
+        return new ICopyEvaluatorFactory() {
+
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException {
+                return new ICopyEvaluator() {
+
+                    private DataOutput out = output.getDataOutput();
+                    private ArrayBackedValueStorage argOut = new ArrayBackedValueStorage();
+                    private ICopyEvaluator eval = args[0].createEvaluator(argOut);
+
+                    // allowed input types
+                    private byte serNullTypeTag = ATypeTag.NULL.serialize();
+                    private byte serInt8TypeTag = ATypeTag.INT8.serialize();
+                    private byte serInt16TypeTag = ATypeTag.INT16.serialize();
+                    private byte serInt32TypeTag = ATypeTag.INT32.serialize();
+
+                    private AMutableDate aDate = new AMutableDate(0);
+
+                    // possible returning types
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ADate> dateSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ADATE);
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ANULL);
+
+                    @Override
+                    public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
+                        argOut.reset();
+                        eval.evaluate(tuple);
+                        try {
+                            if (argOut.getByteArray()[0] == serNullTypeTag) {
+                                nullSerde.serialize(ANull.NULL, out);
+                            } else {
+                                if (argOut.getByteArray()[0] == serInt8TypeTag) {
+                                    aDate.setValue(AInt8SerializerDeserializer.getByte(argOut.getByteArray(), 1));
+                                } else if (argOut.getByteArray()[0] == serInt16TypeTag) {
+                                    aDate.setValue(AInt16SerializerDeserializer.getShort(argOut.getByteArray(), 1));
+                                } else if (argOut.getByteArray()[0] == serInt32TypeTag) {
+                                    aDate.setValue(AInt32SerializerDeserializer.getInt(argOut.getByteArray(), 1));
+                                } else {
+                                    throw new AlgebricksException(
+                                            "Inapplicable input type for function date-from-unix-time-in-days: expecting integer or null type, but got "
+                                                    + argOut.getByteArray()[0]);
+                                }
+                                dateSerde.serialize(aDate, out);
+                            }
+                        } catch (HyracksDataException hex) {
+                            throw new AlgebricksException(hex);
+                        }
+                    }
+                };
+            }
+        };
+    }
+
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/DatetimeFromDateAndTimeDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/DatetimeFromDateAndTimeDescriptor.java
new file mode 100644
index 0000000..2ade4b7
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/DatetimeFromDateAndTimeDescriptor.java
@@ -0,0 +1,144 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.functions.temporal;
+
+import java.io.DataOutput;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ADateSerializerDeserializer;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ATimeSerializerDeserializer;
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.ADateTime;
+import edu.uci.ics.asterix.om.base.AMutableDateTime;
+import edu.uci.ics.asterix.om.base.ANull;
+import edu.uci.ics.asterix.om.base.temporal.GregorianCalendarSystem;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.asterix.om.types.ATypeTag;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
+import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class DatetimeFromDateAndTimeDescriptor extends AbstractScalarFunctionDynamicDescriptor {
+
+    private static final long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "datetime-from-date-time", 2);
+
+    // allowed input types
+    private final static byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize();
+    private final static byte SER_DATE_TYPE_TAG = ATypeTag.DATE.serialize();
+    private final static byte SER_TIME_TYPE_TAG = ATypeTag.TIME.serialize();
+
+    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new DatetimeFromDateAndTimeDescriptor();
+        }
+
+    };
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.runtime.base.IScalarFunctionDynamicDescriptor#createEvaluatorFactory(edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory[])
+     */
+    @Override
+    public ICopyEvaluatorFactory createEvaluatorFactory(final ICopyEvaluatorFactory[] args) throws AlgebricksException {
+        return new ICopyEvaluatorFactory() {
+
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException {
+                return new ICopyEvaluator() {
+
+                    private DataOutput out = output.getDataOutput();
+                    private ArrayBackedValueStorage argOut0 = new ArrayBackedValueStorage();
+                    private ArrayBackedValueStorage argOut1 = new ArrayBackedValueStorage();
+                    private ICopyEvaluator eval0 = args[0].createEvaluator(argOut0);
+                    private ICopyEvaluator eval1 = args[1].createEvaluator(argOut1);
+
+                    // possible returning types
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ADateTime> datetimeSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ADATETIME);
+                    private AMutableDateTime aDateTime = new AMutableDateTime(0);
+
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ANULL);
+
+                    @Override
+                    public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
+                        argOut0.reset();
+                        eval0.evaluate(tuple);
+                        argOut1.reset();
+                        eval1.evaluate(tuple);
+
+                        try {
+                            if (argOut0.getByteArray()[0] == SER_NULL_TYPE_TAG
+                                    || argOut1.getByteArray()[0] == SER_NULL_TYPE_TAG) {
+                                nullSerde.serialize(ANull.NULL, out);
+                            } else {
+                                if (argOut0.getByteArray()[0] != SER_DATE_TYPE_TAG) {
+                                    throw new AlgebricksException(
+                                            "Inapplicable input type for function datetime-from-date-time: expecting a Date ("
+                                                    + SER_DATE_TYPE_TAG + ") or null (" + SER_NULL_TYPE_TAG
+                                                    + ") for the first parameter, but got: "
+                                                    + argOut0.getByteArray()[0]);
+                                }
+
+                                if (argOut1.getByteArray()[0] != SER_TIME_TYPE_TAG) {
+                                    throw new AlgebricksException(
+                                            "Inapplicable input type for function datetime-from-date-time: expecting a Time ("
+                                                    + SER_TIME_TYPE_TAG + ") or null (" + SER_NULL_TYPE_TAG
+                                                    + ") for the secon parameter, but got: "
+                                                    + argOut1.getByteArray()[0]);
+                                }
+
+                                long datetimeChronon = ADateSerializerDeserializer
+                                        .getChronon(argOut0.getByteArray(), 1)
+                                        * GregorianCalendarSystem.CHRONON_OF_DAY
+                                        + ATimeSerializerDeserializer.getChronon(argOut1.getByteArray(), 1);
+
+                                aDateTime.setValue(datetimeChronon);
+                                datetimeSerde.serialize(aDateTime, out);
+                            }
+                        } catch (HyracksDataException hex) {
+                            throw new AlgebricksException(hex);
+                        }
+                    }
+                };
+            }
+        };
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.functions.IFunctionDescriptor#getIdentifier()
+     */
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/DatetimeFromUnixTimeInMsDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/DatetimeFromUnixTimeInMsDescriptor.java
new file mode 100644
index 0000000..dbd34f2
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/DatetimeFromUnixTimeInMsDescriptor.java
@@ -0,0 +1,131 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.functions.temporal;
+
+import java.io.DataOutput;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AInt16SerializerDeserializer;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AInt32SerializerDeserializer;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AInt64SerializerDeserializer;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AInt8SerializerDeserializer;
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.ADateTime;
+import edu.uci.ics.asterix.om.base.AMutableDateTime;
+import edu.uci.ics.asterix.om.base.ANull;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.asterix.om.types.ATypeTag;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
+import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class DatetimeFromUnixTimeInMsDescriptor extends AbstractScalarFunctionDynamicDescriptor {
+
+    private final static long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "datetime-from-unix-time-in-ms", 1);
+
+    // allowed input types
+    private final static byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize();
+    private final static byte SER_INT8_TYPE_TAG = ATypeTag.INT8.serialize();
+    private final static byte SER_INT16_TYPE_TAG = ATypeTag.INT16.serialize();
+    private final static byte SER_INT32_TYPE_TAG = ATypeTag.INT32.serialize();
+    private final static byte SER_INT64_TYPE_TAG = ATypeTag.INT64.serialize();
+
+    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new DatetimeFromUnixTimeInMsDescriptor();
+        }
+    };
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.runtime.base.IScalarFunctionDynamicDescriptor#createEvaluatorFactory(edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory[])
+     */
+    @Override
+    public ICopyEvaluatorFactory createEvaluatorFactory(final ICopyEvaluatorFactory[] args) throws AlgebricksException {
+        return new ICopyEvaluatorFactory() {
+
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException {
+                return new ICopyEvaluator() {
+
+                    private DataOutput out = output.getDataOutput();
+                    private ArrayBackedValueStorage argOut = new ArrayBackedValueStorage();
+                    private ICopyEvaluator eval = args[0].createEvaluator(argOut);
+
+                    // possible output types
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ADateTime> datetimeSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ADATETIME);
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ANULL);
+
+                    private AMutableDateTime aDatetime = new AMutableDateTime(0);
+
+                    @Override
+                    public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
+                        argOut.reset();
+                        eval.evaluate(tuple);
+                        try {
+                            if (argOut.getByteArray()[0] == SER_NULL_TYPE_TAG) {
+                                nullSerde.serialize(ANull.NULL, out);
+                            } else {
+                                if (argOut.getByteArray()[0] == SER_INT8_TYPE_TAG) {
+                                    aDatetime.setValue(AInt8SerializerDeserializer.getByte(argOut.getByteArray(), 1));
+                                } else if (argOut.getByteArray()[0] == SER_INT16_TYPE_TAG) {
+                                    aDatetime.setValue(AInt16SerializerDeserializer.getShort(argOut.getByteArray(), 1));
+                                } else if (argOut.getByteArray()[0] == SER_INT32_TYPE_TAG) {
+                                    aDatetime.setValue(AInt32SerializerDeserializer.getInt(argOut.getByteArray(), 1));
+                                } else if (argOut.getByteArray()[0] == SER_INT64_TYPE_TAG) {
+                                    aDatetime.setValue(AInt64SerializerDeserializer.getLong(argOut.getByteArray(), 1));
+                                } else {
+                                    throw new AlgebricksException(
+                                            "Inapplicable input type for function datetime-from-unix-time-in-ms: expecting integer or null type, but got "
+                                                    + argOut.getByteArray()[0]);
+                                }
+                                datetimeSerde.serialize(aDatetime, out);
+                            }
+                        } catch (HyracksDataException hex) {
+                            throw new AlgebricksException(hex);
+                        }
+                    }
+                };
+            }
+        };
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.functions.IFunctionDescriptor#getIdentifier()
+     */
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalAfterDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalAfterDescriptor.java
new file mode 100644
index 0000000..85bb378
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalAfterDescriptor.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.functions.temporal;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+
+public class IntervalAfterDescriptor extends AbstractIntervalLogicFuncDescriptor {
+
+    private final static long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "interval-after",
+            2);
+
+    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new IntervalAfterDescriptor();
+        }
+    };
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.functions.IFunctionDescriptor#getIdentifier()
+     */
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.runtime.evaluators.functions.temporal.AbstractIntervalLogicFuncDescriptor#compareIntervals(long, long, long, long)
+     */
+    @Override
+    protected boolean compareIntervals(long s1, long e1, long s2, long e2) {
+        return IntervalLogic.after(s1, e1, s2, e2);
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalBeforeDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalBeforeDescriptor.java
new file mode 100644
index 0000000..2da48ee
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalBeforeDescriptor.java
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.functions.temporal;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+
+public class IntervalBeforeDescriptor extends AbstractIntervalLogicFuncDescriptor {
+
+    private final static long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-before", 2);
+
+    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new IntervalBeforeDescriptor();
+        }
+    };
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.functions.IFunctionDescriptor#getIdentifier()
+     */
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+    @Override
+    protected boolean compareIntervals(long s1, long e1, long s2, long e2) {
+        return IntervalLogic.before(s1, e1, s2, e2);
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalCoveredByDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalCoveredByDescriptor.java
new file mode 100644
index 0000000..1064e59
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalCoveredByDescriptor.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.functions.temporal;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+
+public class IntervalCoveredByDescriptor extends AbstractIntervalLogicFuncDescriptor {
+
+    private final static long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-covered-by", 2);
+
+    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new IntervalCoveredByDescriptor();
+        }
+    };
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.functions.IFunctionDescriptor#getIdentifier()
+     */
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.runtime.evaluators.functions.temporal.AbstractIntervalLogicFuncDescriptor#compareIntervals(long, long, long, long)
+     */
+    @Override
+    protected boolean compareIntervals(long s1, long e1, long s2, long e2) {
+        return IntervalLogic.coveredBy(s1, e1, s2, e2);
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalCoversDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalCoversDescriptor.java
new file mode 100644
index 0000000..5b1cfa5
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalCoversDescriptor.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.functions.temporal;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+
+public class IntervalCoversDescriptor extends AbstractIntervalLogicFuncDescriptor {
+
+    private final static long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-covers", 2);
+
+    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new IntervalCoversDescriptor();
+        }
+    };
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.functions.IFunctionDescriptor#getIdentifier()
+     */
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.runtime.evaluators.functions.temporal.AbstractIntervalLogicFuncDescriptor#compareIntervals(long, long, long, long)
+     */
+    @Override
+    protected boolean compareIntervals(long s1, long e1, long s2, long e2) {
+        return IntervalLogic.covers(s1, e1, s2, e2);
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalEndedByDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalEndedByDescriptor.java
new file mode 100644
index 0000000..4610c89
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalEndedByDescriptor.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.functions.temporal;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+
+public class IntervalEndedByDescriptor extends AbstractIntervalLogicFuncDescriptor {
+
+    private final static long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-ended-by", 2);
+
+    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new IntervalEndedByDescriptor();
+        }
+    };
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.functions.IFunctionDescriptor#getIdentifier()
+     */
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.runtime.evaluators.functions.temporal.AbstractIntervalLogicFuncDescriptor#compareIntervals(long, long, long, long)
+     */
+    @Override
+    protected boolean compareIntervals(long s1, long e1, long s2, long e2) {
+        return IntervalLogic.endedBy(s1, e1, s2, e2);
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalEndsDecriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalEndsDecriptor.java
new file mode 100644
index 0000000..9853c62
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalEndsDecriptor.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.functions.temporal;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+
+public class IntervalEndsDecriptor extends AbstractIntervalLogicFuncDescriptor {
+
+    private final static long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "interval-ends",
+            2);
+
+    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new IntervalEndsDecriptor();
+        }
+    };
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.functions.IFunctionDescriptor#getIdentifier()
+     */
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.runtime.evaluators.functions.temporal.AbstractIntervalLogicFuncDescriptor#compareIntervals(long, long, long, long)
+     */
+    @Override
+    protected boolean compareIntervals(long s1, long e1, long s2, long e2) {
+        return IntervalLogic.ends(s1, e1, s2, e2);
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalLogic.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalLogic.java
new file mode 100644
index 0000000..e8e814f
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalLogic.java
@@ -0,0 +1,161 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.functions.temporal;
+
+public class IntervalLogic {
+
+    public static <T extends Comparable<T>> boolean validateInterval(T s, T e) {
+        return s.compareTo(e) <= 0;
+    }
+
+    /**
+     * Anything from interval 1 is less than anything from interval 2.
+     * <p/>
+     * |------|<br/>
+     * &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;|------|<br/>
+     * 
+     * @param s1
+     * @param e1
+     * @param s2
+     * @param e2
+     * @return
+     */
+    public static <T extends Comparable<T>> boolean before(T s1, T e1, T s2, T e2) {
+        return e1.compareTo(s2) < 0;
+    }
+
+    public static <T extends Comparable<T>> boolean after(T s1, T e1, T s2, T e2) {
+        return before(s2, e2, s1, e1);
+    }
+
+    /**
+     * The end of interval 1 is the same as the start of interval 2.
+     * <p/>
+     * |------|<br/>
+     * &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;|------|<br/>
+     * 
+     * @param s1
+     * @param e1
+     * @param s2
+     * @param e2
+     * @return
+     */
+    public static <T extends Comparable<T>> boolean meets(T s1, T e1, T s2, T e2) {
+        return e1.compareTo(s2) == 0;
+    }
+
+    public static <T extends Comparable<T>> boolean metBy(T s1, T e1, T s2, T e2) {
+        return meets(s2, e2, s1, e1);
+    }
+
+    /**
+     * Something at the end of interval 1 is contained as the beginning of interval 2.
+     * <p/>
+     * |------|<br/>
+     * &nbsp;&nbsp;&nbsp;&nbsp;|------|<br/>
+     * 
+     * @param s1
+     * @param e1
+     * @param s2
+     * @param e2
+     * @return
+     */
+    public static <T extends Comparable<T>> boolean overlaps(T s1, T e1, T s2, T e2) {
+        return s1.compareTo(s2) < 0 && e1.compareTo(s2) > 0 && e2.compareTo(e1) > 0;
+    }
+
+    public static <T extends Comparable<T>> boolean overlappedBy(T s1, T e1, T s2, T e2) {
+        return overlaps(s2, e2, s1, e1);
+    }
+
+    /**
+     * Something is shared by both interval 1 and interval 2.
+     * <p/>
+     * 
+     * @param s1
+     * @param e1
+     * @param s2
+     * @param e2
+     * @return
+     */
+    public static <T extends Comparable<T>> boolean overlap(T s1, T e1, T s2, T e2) {
+        return s1.compareTo(e2) < 0 && s2.compareTo(e1) < 0;
+    }
+
+    /**
+     * Anything from interval 1 is contained in the beginning of interval 2.
+     * <p/>
+     * |------|<br/>
+     * |-------|<br/>
+     * 
+     * @param s1
+     * @param e1
+     * @param s2
+     * @param e2
+     * @return
+     */
+    public static <T extends Comparable<T>> boolean starts(T s1, T e1, T s2, T e2) {
+        return s1.compareTo(s2) == 0 && e1.compareTo(e2) <= 0;
+    }
+
+    public static <T extends Comparable<T>> boolean startedBy(T s1, T e1, T s2, T e2) {
+        return starts(s2, e2, s1, e1);
+    }
+
+    /**
+     * Anything from interval 2 is in interval 1.
+     * <p/>
+     * |------|<br/>
+     * &nbsp;&nbsp;|----|<br/>
+     * 
+     * @param s1
+     * @param e1
+     * @param s2
+     * @param e2
+     * @return
+     */
+    public static <T extends Comparable<T>> boolean covers(T s1, T e1, T s2, T e2) {
+        return s1.compareTo(s2) <= 0 && e1.compareTo(e2) >= 0;
+    }
+
+    public static <T extends Comparable<T>> boolean coveredBy(T s1, T e1, T s2, T e2) {
+        return covers(s2, e2, s1, e1);
+    }
+
+    /**
+     * Anything from interval 1 is from the ending part of interval 2.
+     * <p/>
+     * &nbsp;&nbsp;|-----|<br/>
+     * |------|<br/>
+     * 
+     * @param s1
+     * @param e1
+     * @param s2
+     * @param e2
+     * @return
+     */
+    public static <T extends Comparable<T>> boolean ends(T s1, T e1, T s2, T e2) {
+        return s1.compareTo(s2) >= 0 && e1.compareTo(e2) == 0;
+    }
+
+    public static <T extends Comparable<T>> boolean endedBy(T s1, T e1, T s2, T e2) {
+        return ends(s2, e2, s1, e1);
+    }
+
+    public static <T extends Comparable<T>> boolean equals(T s1, T e1, T s2, T e2) {
+        return s1.compareTo(s1) == 0 && e1.compareTo(e2) == 0;
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalMeetsDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalMeetsDescriptor.java
new file mode 100644
index 0000000..0263edb
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalMeetsDescriptor.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.functions.temporal;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+
+public class IntervalMeetsDescriptor extends AbstractIntervalLogicFuncDescriptor {
+
+    private final static long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "interval-meets",
+            2);
+
+    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new IntervalMeetsDescriptor();
+        }
+    };
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.functions.IFunctionDescriptor#getIdentifier()
+     */
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.runtime.evaluators.functions.temporal.AbstractIntervalLogicFuncDescriptor#compareIntervals(long, long, long, long)
+     */
+    @Override
+    protected boolean compareIntervals(long s1, long e1, long s2, long e2) {
+        return IntervalLogic.meets(s1, e1, s2, e2);
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalMetByDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalMetByDescriptor.java
new file mode 100644
index 0000000..4cab864
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalMetByDescriptor.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.functions.temporal;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+
+public class IntervalMetByDescriptor extends AbstractIntervalLogicFuncDescriptor {
+
+    private final static long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-met-by", 2);
+
+    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new IntervalMetByDescriptor();
+        }
+    };
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.functions.IFunctionDescriptor#getIdentifier()
+     */
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.runtime.evaluators.functions.temporal.AbstractIntervalLogicFuncDescriptor#compareIntervals(long, long, long, long)
+     */
+    @Override
+    protected boolean compareIntervals(long s1, long e1, long s2, long e2) {
+        return IntervalLogic.metBy(s1, e1, s2, e2);
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalOverlappedByDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalOverlappedByDescriptor.java
new file mode 100644
index 0000000..17e7612
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalOverlappedByDescriptor.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.functions.temporal;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+
+public class IntervalOverlappedByDescriptor extends AbstractIntervalLogicFuncDescriptor {
+
+    private final static long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-overlapped-by", 2);
+
+    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new IntervalOverlappedByDescriptor();
+        }
+    };
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.functions.IFunctionDescriptor#getIdentifier()
+     */
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.runtime.evaluators.functions.temporal.AbstractIntervalLogicFuncDescriptor#compareIntervals(long, long, long, long)
+     */
+    @Override
+    protected boolean compareIntervals(long s1, long e1, long s2, long e2) {
+        return IntervalLogic.overlappedBy(s1, e1, s2, e2);
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalOverlapsDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalOverlapsDescriptor.java
new file mode 100644
index 0000000..ee62711
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalOverlapsDescriptor.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.functions.temporal;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+
+public class IntervalOverlapsDescriptor extends AbstractIntervalLogicFuncDescriptor {
+
+    private final static long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-overlaps", 2);
+
+    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new IntervalOverlapsDescriptor();
+        }
+    };
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.functions.IFunctionDescriptor#getIdentifier()
+     */
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.runtime.evaluators.functions.temporal.AbstractIntervalLogicFuncDescriptor#compareIntervals(long, long, long, long)
+     */
+    @Override
+    protected boolean compareIntervals(long s1, long e1, long s2, long e2) {
+        return IntervalLogic.overlaps(s1, e1, s2, e2);
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalStartedByDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalStartedByDescriptor.java
new file mode 100644
index 0000000..7e5e0fe
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalStartedByDescriptor.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.functions.temporal;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+
+public class IntervalStartedByDescriptor extends AbstractIntervalLogicFuncDescriptor {
+
+    private final static long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-started-by", 2);
+
+    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new IntervalStartedByDescriptor();
+        }
+    };
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.functions.IFunctionDescriptor#getIdentifier()
+     */
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.runtime.evaluators.functions.temporal.AbstractIntervalLogicFuncDescriptor#compareIntervals(long, long, long, long)
+     */
+    @Override
+    protected boolean compareIntervals(long s1, long e1, long s2, long e2) {
+        return IntervalLogic.startedBy(s1, e1, s2, e2);
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalStartsDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalStartsDescriptor.java
new file mode 100644
index 0000000..c2ca32e
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/IntervalStartsDescriptor.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.functions.temporal;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+
+public class IntervalStartsDescriptor extends AbstractIntervalLogicFuncDescriptor {
+
+    private final static long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "interval-starts", 2);
+
+    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new IntervalStartsDescriptor();
+        }
+    };
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.functions.IFunctionDescriptor#getIdentifier()
+     */
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.runtime.evaluators.functions.temporal.AbstractIntervalLogicFuncDescriptor#compareIntervals(long, long, long, long)
+     */
+    @Override
+    protected boolean compareIntervals(long s1, long e1, long s2, long e2) {
+        return IntervalLogic.starts(s1, e1, s2, e2);
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/OverlapDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/OverlapDescriptor.java
new file mode 100644
index 0000000..80479cd
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/OverlapDescriptor.java
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.functions.temporal;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+
+public class OverlapDescriptor extends AbstractIntervalLogicFuncDescriptor {
+
+    private final static long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "overlap", 2);
+
+    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new OverlapDescriptor();
+        }
+    };
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.functions.IFunctionDescriptor#getIdentifier()
+     */
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.runtime.evaluators.functions.temporal.AbstractIntervalLogicFuncDescriptor#compareIntervals(long, long, long, long)
+     */
+    @Override
+    protected boolean compareIntervals(long s1, long e1, long s2, long e2) {
+        return IntervalLogic.overlap(s1, e1, s2, e2);
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/SubtractDateDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/SubtractDateDescriptor.java
new file mode 100644
index 0000000..67d8ef3
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/SubtractDateDescriptor.java
@@ -0,0 +1,134 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.functions.temporal;
+
+import java.io.DataOutput;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ADateSerializerDeserializer;
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.ADuration;
+import edu.uci.ics.asterix.om.base.AMutableDuration;
+import edu.uci.ics.asterix.om.base.ANull;
+import edu.uci.ics.asterix.om.base.temporal.GregorianCalendarSystem;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.asterix.om.types.ATypeTag;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
+import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class SubtractDateDescriptor extends AbstractScalarFunctionDynamicDescriptor {
+
+    private final static long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "subtract-date",
+            2);
+
+    // allowed input types
+    private final static byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize();
+    private final static byte SER_DATE_TYPE_TAG = ATypeTag.DATE.serialize();
+
+    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new SubtractDateDescriptor();
+        }
+    };
+
+    @Override
+    public ICopyEvaluatorFactory createEvaluatorFactory(final ICopyEvaluatorFactory[] args) throws AlgebricksException {
+        return new ICopyEvaluatorFactory() {
+
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException {
+                return new ICopyEvaluator() {
+
+                    private DataOutput out = output.getDataOutput();
+                    private ArrayBackedValueStorage argOut0 = new ArrayBackedValueStorage();
+                    private ArrayBackedValueStorage argOut1 = new ArrayBackedValueStorage();
+                    private ICopyEvaluator eval0 = args[0].createEvaluator(argOut0);
+                    private ICopyEvaluator eval1 = args[1].createEvaluator(argOut1);
+
+                    // possible output types
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ANULL);
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ADuration> durationSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ADURATION);
+
+                    private AMutableDuration aDuration = new AMutableDuration(0, 0);
+
+                    @Override
+                    public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
+                        argOut0.reset();
+                        eval0.evaluate(tuple);
+                        argOut1.reset();
+                        eval1.evaluate(tuple);
+
+                        try {
+                            if (argOut0.getByteArray()[0] == SER_NULL_TYPE_TAG
+                                    || argOut1.getByteArray()[0] == SER_NULL_TYPE_TAG) {
+                                nullSerde.serialize(ANull.NULL, out);
+                                return;
+                            }
+
+                            if (argOut0.getByteArray()[0] != SER_DATE_TYPE_TAG) {
+                                throw new AlgebricksException(
+                                        "Inapplicable input type for parameter 0: expecting a Date ("
+                                                + SER_DATE_TYPE_TAG + ") or null (" + SER_NULL_TYPE_TAG
+                                                + "), but got: " + argOut0.getByteArray()[0]);
+                            }
+
+                            if (argOut1.getByteArray()[0] != SER_DATE_TYPE_TAG) {
+                                throw new AlgebricksException(
+                                        "Inapplicable input type for parameter 1: expecting a Date ("
+                                                + SER_DATE_TYPE_TAG + ") or null (" + SER_NULL_TYPE_TAG
+                                                + "), but got: " + argOut1.getByteArray()[0]);
+                            }
+
+                            long durationChronon = (ADateSerializerDeserializer.getChronon(argOut0.getByteArray(), 1) - ADateSerializerDeserializer
+                                    .getChronon(argOut1.getByteArray(), 1)) * GregorianCalendarSystem.CHRONON_OF_DAY;
+
+                            aDuration.setValue(0, durationChronon);
+
+                            durationSerde.serialize(aDuration, out);
+
+                        } catch (HyracksDataException hex) {
+                            throw new AlgebricksException(hex);
+                        }
+                    }
+                };
+            }
+        };
+    }
+
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/SubtractDatetimeDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/SubtractDatetimeDescriptor.java
new file mode 100644
index 0000000..5b77709
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/SubtractDatetimeDescriptor.java
@@ -0,0 +1,138 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.functions.temporal;
+
+import java.io.DataOutput;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ADateTimeSerializerDeserializer;
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.ADuration;
+import edu.uci.ics.asterix.om.base.AMutableDuration;
+import edu.uci.ics.asterix.om.base.ANull;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.asterix.om.types.ATypeTag;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
+import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class SubtractDatetimeDescriptor extends AbstractScalarFunctionDynamicDescriptor {
+
+    private final static long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "subtract-datetime", 2);
+
+    // allowed input types
+    private final static byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize();
+    private final static byte SER_DATETIME_TYPE_TAG = ATypeTag.DATETIME.serialize();
+
+    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new SubtractDatetimeDescriptor();
+        }
+    };
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.runtime.base.IScalarFunctionDynamicDescriptor#createEvaluatorFactory(edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory[])
+     */
+    @Override
+    public ICopyEvaluatorFactory createEvaluatorFactory(final ICopyEvaluatorFactory[] args) throws AlgebricksException {
+        return new ICopyEvaluatorFactory() {
+
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException {
+                return new ICopyEvaluator() {
+
+                    private DataOutput out = output.getDataOutput();
+                    private ArrayBackedValueStorage argOut0 = new ArrayBackedValueStorage();
+                    private ArrayBackedValueStorage argOut1 = new ArrayBackedValueStorage();
+                    private ICopyEvaluator eval0 = args[0].createEvaluator(argOut0);
+                    private ICopyEvaluator eval1 = args[1].createEvaluator(argOut1);
+
+                    // possible output types
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ANULL);
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ADuration> durationSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ADURATION);
+
+                    private AMutableDuration aDuration = new AMutableDuration(0, 0);
+
+                    @Override
+                    public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
+                        argOut0.reset();
+                        eval0.evaluate(tuple);
+                        argOut1.reset();
+                        eval1.evaluate(tuple);
+
+                        try {
+                            if (argOut0.getByteArray()[0] == SER_NULL_TYPE_TAG
+                                    || argOut1.getByteArray()[0] == SER_NULL_TYPE_TAG) {
+                                nullSerde.serialize(ANull.NULL, out);
+                                return;
+                            }
+
+                            if (argOut0.getByteArray()[0] != SER_DATETIME_TYPE_TAG) {
+                                throw new AlgebricksException(
+                                        "Inapplicable input type for parameter 0: expecting a DateTime, but got: "
+                                                + argOut0.getByteArray()[0]);
+                            }
+
+                            if (argOut1.getByteArray()[0] != SER_DATETIME_TYPE_TAG) {
+                                throw new AlgebricksException(
+                                        "Inapplicable input type for parameter 1: expecting a DateTime, but got: "
+                                                + argOut1.getByteArray()[0]);
+                            }
+
+                            long durationChronon = ADateTimeSerializerDeserializer
+                                    .getChronon(argOut0.getByteArray(), 1)
+                                    - ADateTimeSerializerDeserializer.getChronon(argOut1.getByteArray(), 1);
+
+                            aDuration.setValue(0, durationChronon);
+
+                            durationSerde.serialize(aDuration, out);
+
+                        } catch (HyracksDataException hex) {
+                            throw new AlgebricksException(hex);
+                        }
+                    }
+                };
+            }
+        };
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.functions.IFunctionDescriptor#getIdentifier()
+     */
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/SubtractTimeDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/SubtractTimeDescriptor.java
new file mode 100644
index 0000000..323033e
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/SubtractTimeDescriptor.java
@@ -0,0 +1,139 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.functions.temporal;
+
+import java.io.DataOutput;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ATimeSerializerDeserializer;
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.ADuration;
+import edu.uci.ics.asterix.om.base.AMutableDuration;
+import edu.uci.ics.asterix.om.base.ANull;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.asterix.om.types.ATypeTag;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
+import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class SubtractTimeDescriptor extends AbstractScalarFunctionDynamicDescriptor {
+
+    private final static long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "subtract-time",
+            2);
+
+    // allowed input types
+    private final static byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize();
+    private final static byte SER_TIME_TYPE_TAG = ATypeTag.TIME.serialize();
+
+    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new SubtractTimeDescriptor();
+        }
+    };
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.runtime.base.IScalarFunctionDynamicDescriptor#createEvaluatorFactory(edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory[])
+     */
+    @Override
+    public ICopyEvaluatorFactory createEvaluatorFactory(final ICopyEvaluatorFactory[] args) throws AlgebricksException {
+        return new ICopyEvaluatorFactory() {
+
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException {
+                return new ICopyEvaluator() {
+
+                    private DataOutput out = output.getDataOutput();
+                    private ArrayBackedValueStorage argOut0 = new ArrayBackedValueStorage();
+                    private ArrayBackedValueStorage argOut1 = new ArrayBackedValueStorage();
+                    private ICopyEvaluator eval0 = args[0].createEvaluator(argOut0);
+                    private ICopyEvaluator eval1 = args[1].createEvaluator(argOut1);
+
+                    // possible output types
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ANULL);
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ADuration> durationSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ADURATION);
+
+                    private AMutableDuration aDuration = new AMutableDuration(0, 0);
+
+                    @Override
+                    public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
+                        argOut0.reset();
+                        eval0.evaluate(tuple);
+                        argOut1.reset();
+                        eval1.evaluate(tuple);
+
+                        try {
+                            if (argOut0.getByteArray()[0] == SER_NULL_TYPE_TAG
+                                    || argOut1.getByteArray()[0] == SER_NULL_TYPE_TAG) {
+                                nullSerde.serialize(ANull.NULL, out);
+                                return;
+                            }
+
+                            if (argOut0.getByteArray()[0] != SER_TIME_TYPE_TAG) {
+                                throw new AlgebricksException(
+                                        "Inapplicable input type for parameter 0: expecting a Time ("
+                                                + SER_TIME_TYPE_TAG + ") or null (" + SER_NULL_TYPE_TAG
+                                                + "), but got: " + argOut0.getByteArray()[0]);
+                            }
+
+                            if (argOut1.getByteArray()[0] != SER_TIME_TYPE_TAG) {
+                                throw new AlgebricksException(
+                                        "Inapplicable input type for parameter 1: expecting a Time ("
+                                                + SER_TIME_TYPE_TAG + ") or null (" + SER_NULL_TYPE_TAG
+                                                + "), but got: " + argOut1.getByteArray()[0]);
+                            }
+
+                            int durationChronon = ATimeSerializerDeserializer.getChronon(argOut0.getByteArray(), 1)
+                                    - ATimeSerializerDeserializer.getChronon(argOut1.getByteArray(), 1);
+
+                            aDuration.setValue(0, durationChronon);
+
+                            durationSerde.serialize(aDuration, out);
+
+                        } catch (HyracksDataException hex) {
+                            throw new AlgebricksException(hex);
+                        }
+                    }
+                };
+            }
+        };
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.functions.IFunctionDescriptor#getIdentifier()
+     */
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/TimeFromDatetimeDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/TimeFromDatetimeDescriptor.java
new file mode 100644
index 0000000..b1053a4
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/TimeFromDatetimeDescriptor.java
@@ -0,0 +1,127 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.functions.temporal;
+
+import java.io.DataOutput;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ADateTimeSerializerDeserializer;
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.AMutableTime;
+import edu.uci.ics.asterix.om.base.ANull;
+import edu.uci.ics.asterix.om.base.ATime;
+import edu.uci.ics.asterix.om.base.temporal.GregorianCalendarSystem;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.asterix.om.types.ATypeTag;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
+import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class TimeFromDatetimeDescriptor extends AbstractScalarFunctionDynamicDescriptor {
+
+    private static final long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "time-from-datetime", 1);
+
+    // allowed input types
+    private final static byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize();
+    private final static byte SER_DATETIME_TYPE_TAG = ATypeTag.DATETIME.serialize();
+
+    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new TimeFromDatetimeDescriptor();
+        }
+
+    };
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.runtime.base.IScalarFunctionDynamicDescriptor#createEvaluatorFactory(edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory[])
+     */
+    @Override
+    public ICopyEvaluatorFactory createEvaluatorFactory(final ICopyEvaluatorFactory[] args) throws AlgebricksException {
+        return new ICopyEvaluatorFactory() {
+
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException {
+                return new ICopyEvaluator() {
+
+                    private DataOutput out = output.getDataOutput();
+                    private ArrayBackedValueStorage argOut = new ArrayBackedValueStorage();
+                    private ICopyEvaluator eval = args[0].createEvaluator(argOut);
+
+                    // possible returning types
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ATime> timeSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ATIME);
+                    private AMutableTime aTime = new AMutableTime(0);
+
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ANULL);
+
+                    @Override
+                    public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
+                        argOut.reset();
+                        eval.evaluate(tuple);
+                        try {
+                            if (argOut.getByteArray()[0] == SER_NULL_TYPE_TAG) {
+                                nullSerde.serialize(ANull.NULL, out);
+                            } else {
+                                if (argOut.getByteArray()[0] != SER_DATETIME_TYPE_TAG) {
+                                    throw new AlgebricksException(
+                                            "Inapplicable input type for function time-from-datetime: expecting a DataTime ("
+                                                    + SER_DATETIME_TYPE_TAG + ") or null (" + SER_NULL_TYPE_TAG
+                                                    + "), but got: " + argOut.getByteArray()[0]);
+                                }
+                                long datetimeChronon = ADateTimeSerializerDeserializer.getChronon(
+                                        argOut.getByteArray(), 1);
+                                int timeChronon = (int) (datetimeChronon % GregorianCalendarSystem.CHRONON_OF_DAY);
+                                if (timeChronon < 0) {
+                                    timeChronon += GregorianCalendarSystem.CHRONON_OF_DAY;
+                                }
+                                aTime.setValue(timeChronon);
+                                timeSerde.serialize(aTime, out);
+                            }
+                        } catch (HyracksDataException hex) {
+                            throw new AlgebricksException(hex);
+                        }
+                    }
+                };
+            }
+        };
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.functions.IFunctionDescriptor#getIdentifier()
+     */
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/TimeFromUnixTimeInMsDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/TimeFromUnixTimeInMsDescriptor.java
new file mode 100644
index 0000000..b3fbc0e
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/TimeFromUnixTimeInMsDescriptor.java
@@ -0,0 +1,126 @@
+/*
+ * Copyright 2009-2011 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.asterix.runtime.evaluators.functions.temporal;
+
+import java.io.DataOutput;
+
+import edu.uci.ics.asterix.common.functions.FunctionConstants;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AInt16SerializerDeserializer;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AInt32SerializerDeserializer;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AInt8SerializerDeserializer;
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.AMutableTime;
+import edu.uci.ics.asterix.om.base.ANull;
+import edu.uci.ics.asterix.om.base.ATime;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptor;
+import edu.uci.ics.asterix.om.functions.IFunctionDescriptorFactory;
+import edu.uci.ics.asterix.om.types.ATypeTag;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.data.std.api.IDataOutputProvider;
+import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class TimeFromUnixTimeInMsDescriptor extends AbstractScalarFunctionDynamicDescriptor {
+
+    private final static long serialVersionUID = 1L;
+    public final static FunctionIdentifier FID = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
+            "time-from-unix-time-in-ms", 1);
+
+    // allowed input types
+    private final static byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize();
+    private final static byte SER_INT8_TYPE_TAG = ATypeTag.INT8.serialize();
+    private final static byte SER_INT16_TYPE_TAG = ATypeTag.INT16.serialize();
+    private final static byte SER_INT32_TYPE_TAG = ATypeTag.INT32.serialize();
+
+    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new TimeFromUnixTimeInMsDescriptor();
+        }
+    };
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.runtime.base.IScalarFunctionDynamicDescriptor#createEvaluatorFactory(edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory[])
+     */
+    @Override
+    public ICopyEvaluatorFactory createEvaluatorFactory(final ICopyEvaluatorFactory[] args) throws AlgebricksException {
+        return new ICopyEvaluatorFactory() {
+
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public ICopyEvaluator createEvaluator(final IDataOutputProvider output) throws AlgebricksException {
+                return new ICopyEvaluator() {
+
+                    private DataOutput out = output.getDataOutput();
+                    private ArrayBackedValueStorage argOut = new ArrayBackedValueStorage();
+                    private ICopyEvaluator eval = args[0].createEvaluator(argOut);
+
+                    // possible output types
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ATime> timeSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ATIME);
+                    @SuppressWarnings("unchecked")
+                    private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
+                            .getSerializerDeserializer(BuiltinType.ANULL);
+
+                    private AMutableTime aTime = new AMutableTime(0);
+
+                    @Override
+                    public void evaluate(IFrameTupleReference tuple) throws AlgebricksException {
+                        argOut.reset();
+                        eval.evaluate(tuple);
+                        try {
+                            if (argOut.getByteArray()[0] == SER_NULL_TYPE_TAG) {
+                                nullSerde.serialize(ANull.NULL, out);
+                            } else {
+                                if (argOut.getByteArray()[0] == SER_INT8_TYPE_TAG) {
+                                    aTime.setValue(AInt8SerializerDeserializer.getByte(argOut.getByteArray(), 1));
+                                } else if (argOut.getByteArray()[0] == SER_INT16_TYPE_TAG) {
+                                    aTime.setValue(AInt16SerializerDeserializer.getShort(argOut.getByteArray(), 1));
+                                } else if (argOut.getByteArray()[0] == SER_INT32_TYPE_TAG) {
+                                    aTime.setValue(AInt32SerializerDeserializer.getInt(argOut.getByteArray(), 1));
+                                } else {
+                                    throw new AlgebricksException(
+                                            "Inapplicable input type for function time-from-unix-time-in-ms: expecting integer or null type, but got "
+                                                    + argOut.getByteArray()[0]);
+                                }
+                                timeSerde.serialize(aTime, out);
+                            }
+                        } catch (HyracksDataException hex) {
+                            throw new AlgebricksException(hex);
+                        }
+                    }
+                };
+            }
+        };
+    }
+
+    /* (non-Javadoc)
+     * @see edu.uci.ics.asterix.om.functions.IFunctionDescriptor#getIdentifier()
+     */
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return FID;
+    }
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/formats/NonTaggedDataFormat.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/formats/NonTaggedDataFormat.java
index 41ca4ed..a334893 100644
--- a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/formats/NonTaggedDataFormat.java
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/formats/NonTaggedDataFormat.java
@@ -66,6 +66,13 @@
 import edu.uci.ics.asterix.runtime.aggregates.std.SumAggregateDescriptor;
 import edu.uci.ics.asterix.runtime.aggregates.stream.EmptyStreamAggregateDescriptor;
 import edu.uci.ics.asterix.runtime.aggregates.stream.NonEmptyStreamAggregateDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.accessors.TemporalDayAccessor;
+import edu.uci.ics.asterix.runtime.evaluators.accessors.TemporalHourAccessor;
+import edu.uci.ics.asterix.runtime.evaluators.accessors.TemporalMillisecondAccessor;
+import edu.uci.ics.asterix.runtime.evaluators.accessors.TemporalMinuteAccessor;
+import edu.uci.ics.asterix.runtime.evaluators.accessors.TemporalMonthAccessor;
+import edu.uci.ics.asterix.runtime.evaluators.accessors.TemporalSecondAccessor;
+import edu.uci.ics.asterix.runtime.evaluators.accessors.TemporalYearAccessor;
 import edu.uci.ics.asterix.runtime.evaluators.accessors.CircleCenterAccessor;
 import edu.uci.ics.asterix.runtime.evaluators.accessors.CircleRadiusAccessor;
 import edu.uci.ics.asterix.runtime.evaluators.accessors.LineRectanglePolygonAccessor;
@@ -85,6 +92,12 @@
 import edu.uci.ics.asterix.runtime.evaluators.constructors.AInt32ConstructorDescriptor;
 import edu.uci.ics.asterix.runtime.evaluators.constructors.AInt64ConstructorDescriptor;
 import edu.uci.ics.asterix.runtime.evaluators.constructors.AInt8ConstructorDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.constructors.AIntervalFromDateConstructorDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.constructors.AIntervalFromDateTimeConstructorDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.constructors.AIntervalFromTimeConstructorDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.constructors.AIntervalStartFromDateConstructorDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.constructors.AIntervalStartFromDateTimeConstructorDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.constructors.AIntervalStartFromTimeConstructorDescriptor;
 import edu.uci.ics.asterix.runtime.evaluators.constructors.ALineConstructorDescriptor;
 import edu.uci.ics.asterix.runtime.evaluators.constructors.ANullConstructorDescriptor;
 import edu.uci.ics.asterix.runtime.evaluators.constructors.APoint3DConstructorDescriptor;
@@ -154,6 +167,10 @@
 import edu.uci.ics.asterix.runtime.evaluators.functions.SpatialDistanceDescriptor;
 import edu.uci.ics.asterix.runtime.evaluators.functions.SpatialIntersectDescriptor;
 import edu.uci.ics.asterix.runtime.evaluators.functions.StartsWithDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.SubstringDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.SwitchCaseDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.UnorderedListConstructorDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.WordTokensDescriptor;
 import edu.uci.ics.asterix.runtime.evaluators.functions.StringConcatDescriptor;
 import edu.uci.ics.asterix.runtime.evaluators.functions.StringEndWithDescrtiptor;
 import edu.uci.ics.asterix.runtime.evaluators.functions.StringEqualDescriptor;
@@ -169,11 +186,38 @@
 import edu.uci.ics.asterix.runtime.evaluators.functions.Substring2Descriptor;
 import edu.uci.ics.asterix.runtime.evaluators.functions.SubstringAfterDescriptor;
 import edu.uci.ics.asterix.runtime.evaluators.functions.SubstringBeforeDescriptor;
-import edu.uci.ics.asterix.runtime.evaluators.functions.SubstringDescriptor;
-import edu.uci.ics.asterix.runtime.evaluators.functions.SwitchCaseDescriptor;
-import edu.uci.ics.asterix.runtime.evaluators.functions.UnorderedListConstructorDescriptor;
-import edu.uci.ics.asterix.runtime.evaluators.functions.WordTokensDescriptor;
-import edu.uci.ics.asterix.runtime.evaluators.functions.YearDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.AddDateDurationDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.AddDatetimeDurationDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.AddTimeDurationDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.AdjustDateTimeForTimeZoneDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.AdjustTimeForTimeZoneDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.CalendarDuartionFromDateDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.CalendarDurationFromDateTimeDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.CurrentDateDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.CurrentDateTimeDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.CurrentTimeDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.DateFromDatetimeDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.DateFromUnixTimeInDaysDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.DatetimeFromDateAndTimeDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.DatetimeFromUnixTimeInMsDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.IntervalAfterDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.IntervalBeforeDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.IntervalCoveredByDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.IntervalCoversDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.IntervalEndedByDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.IntervalEndsDecriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.IntervalMeetsDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.IntervalMetByDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.OverlapDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.IntervalOverlappedByDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.IntervalOverlapsDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.IntervalStartedByDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.IntervalStartsDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.SubtractDateDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.SubtractDatetimeDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.SubtractTimeDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.TimeFromDatetimeDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.TimeFromUnixTimeInMsDescriptor;
 import edu.uci.ics.asterix.runtime.operators.file.AdmSchemafullRecordParserFactory;
 import edu.uci.ics.asterix.runtime.operators.file.NtDelimitedDataTupleParserFactory;
 import edu.uci.ics.asterix.runtime.runningaggregates.std.TidRunningAggregateDescriptor;
@@ -267,22 +311,21 @@
 		temp.add(SubstringDescriptor.FACTORY);
 		temp.add(TidRunningAggregateDescriptor.FACTORY);
 
-		// format-dependent
-		temp.add(AndDescriptor.FACTORY);
-		temp.add(OrDescriptor.FACTORY);
-		temp.add(LikeDescriptor.FACTORY);
-		temp.add(YearDescriptor.FACTORY);
-		temp.add(ScanCollectionDescriptor.FACTORY);
-		temp.add(AnyCollectionMemberDescriptor.FACTORY);
-		temp.add(ClosedRecordConstructorDescriptor.FACTORY);
-		temp.add(FieldAccessByIndexDescriptor.FACTORY);
-		temp.add(FieldAccessByNameDescriptor.FACTORY);
-		temp.add(GetItemDescriptor.FACTORY);
-		temp.add(NumericUnaryMinusDescriptor.FACTORY);
-		temp.add(OpenRecordConstructorDescriptor.FACTORY);
-		temp.add(OrderedListConstructorDescriptor.FACTORY);
-		temp.add(UnorderedListConstructorDescriptor.FACTORY);
-		temp.add(EmbedTypeDescriptor.FACTORY);
+        // format-dependent
+        temp.add(AndDescriptor.FACTORY);
+        temp.add(OrDescriptor.FACTORY);
+        temp.add(LikeDescriptor.FACTORY);
+        temp.add(ScanCollectionDescriptor.FACTORY);
+        temp.add(AnyCollectionMemberDescriptor.FACTORY);
+        temp.add(ClosedRecordConstructorDescriptor.FACTORY);
+        temp.add(FieldAccessByIndexDescriptor.FACTORY);
+        temp.add(FieldAccessByNameDescriptor.FACTORY);
+        temp.add(GetItemDescriptor.FACTORY);
+        temp.add(NumericUnaryMinusDescriptor.FACTORY);
+        temp.add(OpenRecordConstructorDescriptor.FACTORY);
+        temp.add(OrderedListConstructorDescriptor.FACTORY);
+        temp.add(UnorderedListConstructorDescriptor.FACTORY);
+        temp.add(EmbedTypeDescriptor.FACTORY);
 
 		temp.add(NumericAddDescriptor.FACTORY);
 		temp.add(NumericDivideDescriptor.FACTORY);
@@ -417,12 +460,63 @@
 		temp.add(CastRecordDescriptor.FACTORY);
 		temp.add(NotNullDescriptor.FACTORY);
 
-		IFunctionManager mgr = new FunctionManagerImpl();
-		for (IFunctionDescriptorFactory fdFactory : temp) {
-			mgr.registerFunction(fdFactory);
-		}
-		FunctionManagerHolder.setFunctionManager(mgr);
-	}
+        // Spatial and temporal type accessors
+        temp.add(TemporalYearAccessor.FACTORY);
+        temp.add(TemporalMonthAccessor.FACTORY);
+        temp.add(TemporalDayAccessor.FACTORY);
+        temp.add(TemporalHourAccessor.FACTORY);
+        temp.add(TemporalMinuteAccessor.FACTORY);
+        temp.add(TemporalSecondAccessor.FACTORY);
+        temp.add(TemporalMillisecondAccessor.FACTORY);
+
+        // Temporal functions
+        temp.add(DateFromUnixTimeInDaysDescriptor.FACTORY);
+        temp.add(DateFromDatetimeDescriptor.FACTORY);
+        temp.add(AddDateDurationDescriptor.FACTORY);
+        temp.add(SubtractDateDescriptor.FACTORY);
+        temp.add(TimeFromUnixTimeInMsDescriptor.FACTORY);
+        temp.add(TimeFromDatetimeDescriptor.FACTORY);
+        temp.add(SubtractTimeDescriptor.FACTORY);
+        temp.add(AddTimeDurationDescriptor.FACTORY);
+        temp.add(DatetimeFromUnixTimeInMsDescriptor.FACTORY);
+        temp.add(DatetimeFromDateAndTimeDescriptor.FACTORY);
+        temp.add(SubtractDatetimeDescriptor.FACTORY);
+        temp.add(AddDatetimeDurationDescriptor.FACTORY);
+        temp.add(CalendarDurationFromDateTimeDescriptor.FACTORY);
+        temp.add(CalendarDuartionFromDateDescriptor.FACTORY);
+        temp.add(AdjustDateTimeForTimeZoneDescriptor.FACTORY);
+        temp.add(AdjustTimeForTimeZoneDescriptor.FACTORY);
+        temp.add(IntervalBeforeDescriptor.FACTORY);
+        temp.add(IntervalAfterDescriptor.FACTORY);
+        temp.add(IntervalMeetsDescriptor.FACTORY);
+        temp.add(IntervalMetByDescriptor.FACTORY);
+        temp.add(IntervalOverlapsDescriptor.FACTORY);
+        temp.add(IntervalOverlappedByDescriptor.FACTORY);
+        temp.add(OverlapDescriptor.FACTORY);
+        temp.add(IntervalStartsDescriptor.FACTORY);
+        temp.add(IntervalStartedByDescriptor.FACTORY);
+        temp.add(IntervalCoversDescriptor.FACTORY);
+        temp.add(IntervalCoveredByDescriptor.FACTORY);
+        temp.add(IntervalEndsDecriptor.FACTORY);
+        temp.add(IntervalEndedByDescriptor.FACTORY);
+        temp.add(CurrentDateDescriptor.FACTORY);
+        temp.add(CurrentTimeDescriptor.FACTORY);
+        temp.add(CurrentDateTimeDescriptor.FACTORY);
+
+        // Interval constructor
+        temp.add(AIntervalFromDateConstructorDescriptor.FACTORY);
+        temp.add(AIntervalFromTimeConstructorDescriptor.FACTORY);
+        temp.add(AIntervalFromDateTimeConstructorDescriptor.FACTORY);
+        temp.add(AIntervalStartFromDateConstructorDescriptor.FACTORY);
+        temp.add(AIntervalStartFromDateTimeConstructorDescriptor.FACTORY);
+        temp.add(AIntervalStartFromTimeConstructorDescriptor.FACTORY);
+
+        IFunctionManager mgr = new FunctionManagerImpl();
+        for (IFunctionDescriptorFactory fdFactory : temp) {
+            mgr.registerFunction(fdFactory);
+        }
+        FunctionManagerHolder.setFunctionManager(mgr);
+    }
 
 	@Override
 	public IBinaryBooleanInspectorFactory getBinaryBooleanInspectorFactory() {
diff --git a/asterix-runtime/src/main/javacc/nontagged/AdmLexer.jj b/asterix-runtime/src/main/javacc/nontagged/AdmLexer.jj
index f556d54..d94033d 100644
--- a/asterix-runtime/src/main/javacc/nontagged/AdmLexer.jj
+++ b/asterix-runtime/src/main/javacc/nontagged/AdmLexer.jj
@@ -144,13 +144,13 @@
 <DEFAULT>
 TOKEN :
 {
-	<TIMEZONE_LITERAL : (("+"|"-")<INTEGER>(":")<INTEGER>) | ("Z") >
+	<TIMEZONE_LITERAL : (("+"|"-")<DIGIT><DIGIT>(":")<DIGIT><DIGIT>) | (("+"|"-")<DIGIT><DIGIT><DIGIT><DIGIT>) | ("Z") >
 }
 
 <DEFAULT>
 TOKEN :
 {
-	<DATE_LITERAL : ("-")?<INTEGER>("-")<INTEGER>("-")<INTEGER> (<TIMEZONE_LITERAL>)? >
+	<DATE_LITERAL : (("-")?<DIGIT><DIGIT><DIGIT><DIGIT>("-")<DIGIT><DIGIT>("-")<DIGIT><DIGIT>) | (("-")?<DIGIT><DIGIT><DIGIT><DIGIT><DIGIT><DIGIT><DIGIT><DIGIT>) >
 }
 
 <DEFAULT>
@@ -162,7 +162,7 @@
 <DEFAULT>
 TOKEN :
 {
-	<TIME_LITERAL : <INTEGER>(":")<INTEGER>(":")<INTEGER> ( (":")<INTEGER>)? (<TIMEZONE_LITERAL>)? >
+	<TIME_LITERAL : (<DIGIT><DIGIT>(":")<DIGIT><DIGIT>(":")<DIGIT><DIGIT> ( (".")<DIGIT>(<DIGIT>((<DIGIT>)?))?)? ((("+"|"-")<DIGIT><DIGIT>(":")<DIGIT><DIGIT>) | ("Z"))?) | (<DIGIT><DIGIT><DIGIT><DIGIT><DIGIT><DIGIT> (<DIGIT>(<DIGIT>((<DIGIT>)?))?)? ((("+"|"-")<DIGIT><DIGIT><DIGIT><DIGIT>) | ("Z"))?) >
 }
 
 <DEFAULT>
@@ -174,7 +174,7 @@
 <DEFAULT>
 TOKEN :
 {
-	<DATETIME_LITERAL : ("-")? <INTEGER>("-")<INTEGER>("-")<INTEGER>("T")<INTEGER>(":")<INTEGER>(":")<INTEGER> ( (":")<INTEGER>)? (<TIMEZONE_LITERAL>)?>
+	<DATETIME_LITERAL : (("-")?<DIGIT><DIGIT><DIGIT><DIGIT>("-")<DIGIT><DIGIT>("-")<DIGIT><DIGIT>("T")<DIGIT><DIGIT>(":")<DIGIT><DIGIT>(":")<DIGIT><DIGIT> ( (".")<DIGIT>(<DIGIT>((<DIGIT>)?))?)? ((("+"|"-")<DIGIT><DIGIT>(":")<DIGIT><DIGIT>) | ("Z"))?) | (("-")?<DIGIT><DIGIT><DIGIT><DIGIT><DIGIT><DIGIT><DIGIT><DIGIT>("T")<DIGIT><DIGIT><DIGIT><DIGIT><DIGIT><DIGIT> (<DIGIT>(<DIGIT>((<DIGIT>)?))?)? ((("+"|"-")<DIGIT><DIGIT><DIGIT><DIGIT>) | ("Z"))?)>
 }
 
 <DEFAULT>
@@ -186,7 +186,7 @@
 <DEFAULT>
 TOKEN :
 {
-	<DURATION_LITERAL : ("-")? ("D")(<INTEGER>("Y"))?(<INTEGER>("M"))?(<INTEGER>("D"))?(("T")(<INTEGER>("H"))?(<INTEGER>("M"))?(<INTEGER>("S"))?)?>
+	<DURATION_LITERAL : ("-")? ("P")(<INTEGER>("Y"))?(<INTEGER>("M"))?(<INTEGER>("D"))?(("T")(((<INTEGER>("H"))(<INTEGER>("M"))?(<INTEGER>((".")<DIGIT>(<DIGIT>(<DIGIT>)?)?)?("S"))?) | ((<INTEGER>("M"))(<INTEGER>((".")<DIGIT>(<DIGIT>(<DIGIT>)?)?)?("S"))?) | ((<INTEGER>((".")<DIGIT>(<DIGIT>(<DIGIT>)?)?)?("S")))))?>
 }
 
 <DEFAULT>
@@ -197,6 +197,29 @@
 
 <DEFAULT>
 TOKEN :
+{	<INTERVAL_CONS : ("interval")>
+}
+
+<DEFAULT>
+TOKEN :
+{
+	<TIME_INTERVAL_CONS : ("tinterval")>
+}
+
+<DEFAULT>
+TOKEN :
+{
+	<DATE_INTERVAL_CONS : ("dinterval")>
+}
+
+<DEFAULT>
+TOKEN :
+{
+	<DATETIME_INTERVAL_CONS : ("dtinterval")>
+}
+
+<DEFAULT>
+TOKEN :
 {
 	<#DIGIT : ["0" - "9"]>
 }
diff --git a/pom.xml b/pom.xml
index 5080813..fadaa0b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,6 +6,11 @@
 	<version>0.0.4-SNAPSHOT</version>
 	<packaging>pom</packaging>
 
+    <properties>
+    	<algebricks.version>0.2.3-SNAPSHOT</algebricks.version>
+    	<hyracks.version>0.2.3-SNAPSHOT</hyracks.version>
+    </properties>
+
 	<build>
 		<plugins>
 			<plugin>
@@ -20,11 +25,6 @@
 		</plugins>
 	</build>
 
-    <properties>
-    	<algebricks.version>0.2.3-SNAPSHOT</algebricks.version>
-    	<hyracks.version>0.2.3-SNAPSHOT</hyracks.version>
-    </properties>
-
 	<scm>
 		<connection>scm:svn:https://grape.ics.uci.edu/svn/asterix/trunk/asterix</connection>
 		<developerConnection>scm:svn:https://grape.ics.uci.edu/svn/asterix/trunk/asterix</developerConnection>
@@ -142,7 +142,7 @@
             <optional>true</optional>
         </dependency>
     </dependencies>
-    <dependencyManagement>
+        <dependencyManagement>
     	<dependencies>
     		<dependency>
     			<groupId>edu.uci.ics.hyracks</groupId>