diff --git a/asterix-app/src/test/resources/runtimets/queries/temporal/duration_comps/duration_comps.3.query.aql b/asterix-app/src/test/resources/runtimets/queries/temporal/duration_comps/duration_comps.3.query.aql
index 3683b3c..77fcc4f 100644
--- a/asterix-app/src/test/resources/runtimets/queries/temporal/duration_comps/duration_comps.3.query.aql
+++ b/asterix-app/src/test/resources/runtimets/queries/temporal/duration_comps/duration_comps.3.query.aql
@@ -8,4 +8,4 @@
 let $dr6 := duration-from-months(months-of-year-month-duration($dr3))
 let $dr7 := duration-from-ms(ms-of-day-time-duration($dr1))
 
-return { "yearMonthComp" : year-month-duration-greater($dr4, $dr3), "dayTimeComp" : day-time-duration-greater($dr2, $dr1), "equal1": duration-equal($dr2, $dr5), "equal2": duration-equal($dr1, $dr5), "equal3": duration-equal($dr6, $dr3), "equal4": duration-equal($dr7, $dr1) }
\ No newline at end of file
+return { "yearMonthGreaterComp" : year-month-duration-greater-than($dr4, $dr3), "dayTimeGreaterComp" : day-time-duration-greater-than($dr2, $dr1), "yearMonthLessComp" : year-month-duration-less-than($dr4, $dr3), "dayTimeLessComp" : day-time-duration-less-than($dr2, $dr1), "equal1": duration-equal($dr2, $dr5), "equal2": duration-equal($dr1, $dr5), "equal3": duration-equal($dr6, $dr3), "equal4": duration-equal($dr7, $dr1) }
\ No newline at end of file
diff --git a/asterix-app/src/test/resources/runtimets/results/temporal/duration_comps/duration_comps.1.adm b/asterix-app/src/test/resources/runtimets/results/temporal/duration_comps/duration_comps.1.adm
index 9693453..26b32fc 100644
--- a/asterix-app/src/test/resources/runtimets/results/temporal/duration_comps/duration_comps.1.adm
+++ b/asterix-app/src/test/resources/runtimets/results/temporal/duration_comps/duration_comps.1.adm
@@ -1 +1 @@
-{ "yearMonthComp": true, "dayTimeComp": true, "equal1": true, "equal2": false, "equal3": true, "equal4": true }
\ No newline at end of file
+{ "yearMonthGreaterComp": true, "dayTimeGreaterComp": true, "yearMonthLessComp": false, "dayTimeLessComp": false, "equal1": true, "equal2": false, "equal3": true, "equal4": true }
\ No newline at end of file
diff --git a/asterix-app/src/test/resources/runtimets/testsuite.xml b/asterix-app/src/test/resources/runtimets/testsuite.xml
index 17ec2bb..dd29a7b 100644
--- a/asterix-app/src/test/resources/runtimets/testsuite.xml
+++ b/asterix-app/src/test/resources/runtimets/testsuite.xml
@@ -4205,6 +4205,11 @@
         <output-dir compare="Text">interval</output-dir>
       </compilation-unit>
   	</test-case>
+  	<test-case FilePath="temporal">
+  		<compilation-unit name="duration_comps">
+        <output-dir compare="Text">duration_comps</output-dir>
+      </compilation-unit>
+  	</test-case>
   </test-group>
   <test-group name="leftouterjoin">
     <test-case FilePath="leftouterjoin">
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 2166511..3cad3be 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
@@ -416,10 +416,14 @@
             "current-datetime", 0);
     public final static FunctionIdentifier DURATION_EQUAL = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
             "duration-equal", 2);
-    public final static FunctionIdentifier YEAR_MONTH_DURATION_GREATER = new FunctionIdentifier(
-            FunctionConstants.ASTERIX_NS, "year-month-duration-greater", 2);
-    public final static FunctionIdentifier DAY_TIME_DURATION_GREATER = new FunctionIdentifier(
-            FunctionConstants.ASTERIX_NS, "day-time-duration-greater", 2);
+    public final static FunctionIdentifier YEAR_MONTH_DURATION_GREATER_THAN = new FunctionIdentifier(
+            FunctionConstants.ASTERIX_NS, "year-month-duration-greater-than", 2);
+    public final static FunctionIdentifier YEAR_MONTH_DURATION_LESS_THAN = new FunctionIdentifier(
+            FunctionConstants.ASTERIX_NS, "year-month-duration-less-than", 2);
+    public final static FunctionIdentifier DAY_TIME_DURATION_GREATER_THAN = new FunctionIdentifier(
+            FunctionConstants.ASTERIX_NS, "day-time-duration-greater-than", 2);
+    public final static FunctionIdentifier DAY_TIME_DURATION_LESS_THAN = new FunctionIdentifier(
+            FunctionConstants.ASTERIX_NS, "day-time-duration-less-than", 2);
     public final static FunctionIdentifier DURATION_FROM_MONTHS = new FunctionIdentifier(FunctionConstants.ASTERIX_NS,
             "duration-from-months", 1);
     public final static FunctionIdentifier MONTHS_OF_YEAR_MONTH_DURATION = new FunctionIdentifier(
@@ -829,6 +833,15 @@
         add(CURRENT_DATE, ADateTypeComputer.INSTANCE);
         add(CURRENT_TIME, ATimeTypeComputer.INSTANCE);
         add(CURRENT_DATETIME, ADateTimeTypeComputer.INSTANCE);
+        add(DAY_TIME_DURATION_GREATER_THAN, OptionalABooleanTypeComputer.INSTANCE);
+        add(DAY_TIME_DURATION_LESS_THAN, OptionalABooleanTypeComputer.INSTANCE);
+        add(YEAR_MONTH_DURATION_GREATER_THAN, OptionalABooleanTypeComputer.INSTANCE);
+        add(YEAR_MONTH_DURATION_LESS_THAN, OptionalABooleanTypeComputer.INSTANCE);
+        add(DURATION_EQUAL, OptionalABooleanTypeComputer.INSTANCE);
+        add(DURATION_FROM_MONTHS, OptionalADurationTypeComputer.INSTANCE);
+        add(DURATION_FROM_MILLISECONDS, OptionalADurationTypeComputer.INSTANCE);
+        add(MONTHS_OF_YEAR_MONTH_DURATION, OptionalAInt32TypeComputer.INSTANCE);
+        add(MILLISECONDS_OF_DAY_TIME_DURATION, OptionalAInt64TypeComputer.INSTANCE);
 
         // interval constructors
         add(INTERVAL_CONSTRUCTOR_DATE, OptionalAIntervalTypeComputer.INSTANCE);
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/DayTimeDurationGreaterDescriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/DayTimeDurationComparatorDescriptor.java
similarity index 81%
rename from asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/DayTimeDurationGreaterDescriptor.java
rename to asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/DayTimeDurationComparatorDescriptor.java
index 18578c9..bb83016 100644
--- a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/DayTimeDurationGreaterDescriptor.java
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/DayTimeDurationComparatorDescriptor.java
@@ -37,20 +37,35 @@
 import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
 
-public class DayTimeDurationGreaterDescriptor extends AbstractScalarFunctionDynamicDescriptor {
+public class DayTimeDurationComparatorDescriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private final static long serialVersionUID = 1L;
-    public final static FunctionIdentifier FID = AsterixBuiltinFunctions.DAY_TIME_DURATION_GREATER;
+    public final static FunctionIdentifier GREATER_THAN_FID = AsterixBuiltinFunctions.DAY_TIME_DURATION_GREATER_THAN;
+    public final static FunctionIdentifier LESS_THAN_FID = AsterixBuiltinFunctions.DAY_TIME_DURATION_LESS_THAN;
 
     // allowed input types
     private final static byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize();
     private final static byte SER_DURATION_TYPE_TAG = ATypeTag.DURATION.serialize();
 
-    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+    private final boolean isGreaterThan;
+
+    private DayTimeDurationComparatorDescriptor(boolean isGreaterThan) {
+        this.isGreaterThan = isGreaterThan;
+    }
+
+    public final static IFunctionDescriptorFactory GREATER_THAN_FACTORY = new IFunctionDescriptorFactory() {
 
         @Override
         public IFunctionDescriptor createFunctionDescriptor() {
-            return new DayTimeDurationGreaterDescriptor();
+            return new DayTimeDurationComparatorDescriptor(true);
+        }
+    };
+
+    public final static IFunctionDescriptorFactory LESS_THAN_FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new DayTimeDurationComparatorDescriptor(false);
         }
     };
 
@@ -94,7 +109,7 @@
 
                             if (argOut0.getByteArray()[0] != SER_DURATION_TYPE_TAG
                                     || argOut1.getByteArray()[0] != SER_DURATION_TYPE_TAG) {
-                                throw new AlgebricksException(FID.getName()
+                                throw new AlgebricksException(getIdentifier().getName()
                                         + ": expects type NULL/DURATION, NULL/DURATION but got "
                                         + EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(argOut0.getByteArray()[0])
                                         + " and "
@@ -103,15 +118,15 @@
 
                             if ((ADurationSerializerDeserializer.getYearMonth(argOut0.getByteArray(), 1) != 0)
                                     || (ADurationSerializerDeserializer.getYearMonth(argOut1.getByteArray(), 1) != 0)) {
-                                throw new AlgebricksException(FID.getName()
+                                throw new AlgebricksException(getIdentifier().getName()
                                         + ": only year-month durations are allowed.");
                             }
 
                             if (ADurationSerializerDeserializer.getDayTime(argOut0.getByteArray(), 1) > ADurationSerializerDeserializer
                                     .getDayTime(argOut1.getByteArray(), 1)) {
-                                boolSerde.serialize(ABoolean.TRUE, out);
+                                boolSerde.serialize(isGreaterThan ? ABoolean.TRUE : ABoolean.FALSE, out);
                             } else {
-                                boolSerde.serialize(ABoolean.FALSE, out);
+                                boolSerde.serialize(isGreaterThan ? ABoolean.FALSE : ABoolean.TRUE, out);
                             }
 
                         } catch (HyracksDataException hex) {
@@ -128,7 +143,7 @@
      */
     @Override
     public FunctionIdentifier getIdentifier() {
-        return FID;
+        return isGreaterThan ? GREATER_THAN_FID : LESS_THAN_FID;
     }
 
 }
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/YearMonthDurationGreaterDecriptor.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/YearMonthDurationComparatorDecriptor.java
similarity index 81%
rename from asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/YearMonthDurationGreaterDecriptor.java
rename to asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/YearMonthDurationComparatorDecriptor.java
index 090005c..22ab96c 100644
--- a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/YearMonthDurationGreaterDecriptor.java
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/evaluators/functions/temporal/YearMonthDurationComparatorDecriptor.java
@@ -37,20 +37,35 @@
 import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
 import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
 
-public class YearMonthDurationGreaterDecriptor extends AbstractScalarFunctionDynamicDescriptor {
+public class YearMonthDurationComparatorDecriptor extends AbstractScalarFunctionDynamicDescriptor {
 
     private final static long serialVersionUID = 1L;
-    public final static FunctionIdentifier FID = AsterixBuiltinFunctions.YEAR_MONTH_DURATION_GREATER;
+    public final static FunctionIdentifier GREATER_THAN_FID = AsterixBuiltinFunctions.YEAR_MONTH_DURATION_GREATER_THAN;
+    public final static FunctionIdentifier LESS_THAN_FID = AsterixBuiltinFunctions.YEAR_MONTH_DURATION_LESS_THAN;
 
     // allowed input types
     private final static byte SER_NULL_TYPE_TAG = ATypeTag.NULL.serialize();
     private final static byte SER_DURATION_TYPE_TAG = ATypeTag.DURATION.serialize();
+    
+    private final boolean isGreaterThan;
 
-    public final static IFunctionDescriptorFactory FACTORY = new IFunctionDescriptorFactory() {
+    private YearMonthDurationComparatorDecriptor(boolean isGreaterThan) {
+        this.isGreaterThan = isGreaterThan;
+    }
+
+    public final static IFunctionDescriptorFactory GREATER_THAN_FACTORY = new IFunctionDescriptorFactory() {
 
         @Override
         public IFunctionDescriptor createFunctionDescriptor() {
-            return new YearMonthDurationGreaterDecriptor();
+            return new YearMonthDurationComparatorDecriptor(true);
+        }
+    };
+
+    public final static IFunctionDescriptorFactory LESS_THAN_FACTORY = new IFunctionDescriptorFactory() {
+
+        @Override
+        public IFunctionDescriptor createFunctionDescriptor() {
+            return new YearMonthDurationComparatorDecriptor(false);
         }
     };
 
@@ -94,7 +109,7 @@
 
                             if (argOut0.getByteArray()[0] != SER_DURATION_TYPE_TAG
                                     || argOut1.getByteArray()[0] != SER_DURATION_TYPE_TAG) {
-                                throw new AlgebricksException(FID.getName()
+                                throw new AlgebricksException(getIdentifier().getName()
                                         + ": expects type NULL/DURATION, NULL/DURATION but got "
                                         + EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(argOut0.getByteArray()[0])
                                         + " and "
@@ -103,15 +118,15 @@
 
                             if ((ADurationSerializerDeserializer.getDayTime(argOut0.getByteArray(), 1) != 0)
                                     || (ADurationSerializerDeserializer.getDayTime(argOut1.getByteArray(), 1) != 0)) {
-                                throw new AlgebricksException(FID.getName()
+                                throw new AlgebricksException(getIdentifier().getName()
                                         + ": only year-month durations are allowed.");
                             }
 
                             if (ADurationSerializerDeserializer.getYearMonth(argOut0.getByteArray(), 1) > ADurationSerializerDeserializer
                                     .getYearMonth(argOut1.getByteArray(), 1)) {
-                                boolSerde.serialize(ABoolean.TRUE, out);
+                                boolSerde.serialize(isGreaterThan ? ABoolean.TRUE : ABoolean.FALSE, out);
                             } else {
-                                boolSerde.serialize(ABoolean.FALSE, out);
+                                boolSerde.serialize(isGreaterThan ? ABoolean.FALSE : ABoolean.TRUE, out);
                             }
 
                         } catch (HyracksDataException hex) {
@@ -128,7 +143,7 @@
      */
     @Override
     public FunctionIdentifier getIdentifier() {
-        return FID;
+        return isGreaterThan ? GREATER_THAN_FID : LESS_THAN_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 dec1a83..84142be 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
@@ -203,7 +203,7 @@
 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.DayTimeDurationGreaterDescriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.DayTimeDurationComparatorDescriptor;
 import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.DurationEqualDescriptor;
 import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.DurationFromMillisecondsDescriptor;
 import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.DurationFromMonthsDescriptor;
@@ -227,7 +227,7 @@
 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.evaluators.functions.temporal.YearMonthDurationGreaterDecriptor;
+import edu.uci.ics.asterix.runtime.evaluators.functions.temporal.YearMonthDurationComparatorDecriptor;
 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;
@@ -511,8 +511,10 @@
         temp.add(CurrentDateTimeDescriptor.FACTORY);
         temp.add(DurationFromMillisecondsDescriptor.FACTORY);
         temp.add(DurationFromMonthsDescriptor.FACTORY);
-        temp.add(YearMonthDurationGreaterDecriptor.FACTORY);
-        temp.add(DayTimeDurationGreaterDescriptor.FACTORY);
+        temp.add(YearMonthDurationComparatorDecriptor.GREATER_THAN_FACTORY);
+        temp.add(YearMonthDurationComparatorDecriptor.LESS_THAN_FACTORY);
+        temp.add(DayTimeDurationComparatorDescriptor.GREATER_THAN_FACTORY);
+        temp.add(DayTimeDurationComparatorDescriptor.LESS_THAN_FACTORY);
         temp.add(MonthsOfYearMonthDurationDescriptor.FACTORY);
         temp.add(MillisecondsOfDayTimeDurationDescriptor.FACTORY);
         temp.add(DurationEqualDescriptor.FACTORY);