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
deleted file mode 100644
index 464a03c..0000000
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/comparators/ADateOrTimeAscBinaryComparatorFactory.java
+++ /dev/null
@@ -1,56 +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.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/ADateTimeAscBinaryComparatorFactory.java b/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/comparators/ADateTimeAscBinaryComparatorFactory.java
deleted file mode 100644
index 2dd8785..0000000
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/comparators/ADateTimeAscBinaryComparatorFactory.java
+++ /dev/null
@@ -1,43 +0,0 @@
-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 ADateTimeAscBinaryComparatorFactory implements IBinaryComparatorFactory {
-    private static final long serialVersionUID = 1L;
-
-    public static final ADateTimeAscBinaryComparatorFactory INSTANCE = new ADateTimeAscBinaryComparatorFactory();
-
-    private ADateTimeAscBinaryComparatorFactory() {
-    }
-
-    @Override
-    public IBinaryComparator createBinaryComparator() {
-        return new IBinaryComparator() {
-
-            @Override
-            public int compare(byte[] b1, int s1, int l1, byte[] b2, int s2, int l2) {
-
-                long chrononTime1 = getLong(b1, s1);
-                long chrononTime2 = getLong(b2, s2);
-
-                if (chrononTime1 > chrononTime2) {
-                    return 1;
-                } else if (chrononTime1 < chrononTime2) {
-                    return -1;
-                } else {
-                    return 0;
-                }
-            }
-
-            private long getLong(byte[] bytes, int start) {
-                return (((long) (bytes[start] & 0xff)) << 56) + (((long) (bytes[start + 1] & 0xff)) << 48)
-                        + (((long) (bytes[start + 2] & 0xff)) << 40) + (((long) (bytes[start + 3] & 0xff)) << 32)
-                        + (((long) (bytes[start + 4] & 0xff)) << 24) + (((long) (bytes[start + 5] & 0xff)) << 16)
-                        + (((long) (bytes[start + 6] & 0xff)) << 8) + (((long) (bytes[start + 7] & 0xff)) << 0);
-            }
-
-        };
-    }
-
-}
diff --git a/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/hash/AObjectBinaryHashFunctionFactory.java b/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/hash/AObjectBinaryHashFunctionFactory.java
index e132814..45acd7d 100644
--- a/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/hash/AObjectBinaryHashFunctionFactory.java
+++ b/asterix-om/src/main/java/edu/uci/ics/asterix/dataflow/data/nontagged/hash/AObjectBinaryHashFunctionFactory.java
@@ -2,7 +2,6 @@
 
 import edu.uci.ics.asterix.om.types.ATypeTag;
 import edu.uci.ics.asterix.om.types.EnumDeserializer;
-import edu.uci.ics.hyracks.algebricks.common.exceptions.NotImplementedException;
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryHashFunction;
 import edu.uci.ics.hyracks.api.dataflow.value.IBinaryHashFunctionFactory;
 import edu.uci.ics.hyracks.data.std.accessors.PointableBinaryHashFunctionFactory;
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 18b31ec1..d72efb2 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
@@ -3,8 +3,6 @@
 import java.io.Serializable;
 
 import edu.uci.ics.asterix.dataflow.data.nontagged.comparators.ACirclePartialBinaryComparatorFactory;
-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.ADurationPartialBinaryComparatorFactory;
 import edu.uci.ics.asterix.dataflow.data.nontagged.comparators.AIntervalPartialBinaryComparatorFactory;
 import edu.uci.ics.asterix.dataflow.data.nontagged.comparators.ALinePartialBinaryComparatorFactory;