diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/AbstractSerializableAvgAggregateFunction.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/AbstractSerializableAvgAggregateFunction.java
new file mode 100644
index 0000000..8e396ed
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/AbstractSerializableAvgAggregateFunction.java
@@ -0,0 +1,163 @@
+/*
+ * Copyright 2009-2013 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.aggregates.serializable.std;
+
+import java.io.DataOutput;
+import java.io.IOException;
+
+import edu.uci.ics.asterix.common.config.GlobalConfig;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ADoubleSerializerDeserializer;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AFloatSerializerDeserializer;
+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.ADouble;
+import edu.uci.ics.asterix.om.base.AMutableDouble;
+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.om.types.EnumDeserializer;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.NotImplementedException;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopySerializableAggregateFunction;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public abstract class AbstractSerializableAvgAggregateFunction implements ICopySerializableAggregateFunction {
+
+    private ArrayBackedValueStorage inputVal = new ArrayBackedValueStorage();
+    private ICopyEvaluator eval;
+
+    private AMutableDouble aDouble = new AMutableDouble(0);
+    @SuppressWarnings("unchecked")
+    private ISerializerDeserializer<ADouble> doubleSerde = AqlSerializerDeserializerProvider.INSTANCE
+            .getSerializerDeserializer(BuiltinType.ADOUBLE);
+    @SuppressWarnings("unchecked")
+    private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
+            .getSerializerDeserializer(BuiltinType.ANULL);
+
+    public AbstractSerializableAvgAggregateFunction(ICopyEvaluatorFactory[] args) throws AlgebricksException {
+        eval = args[0].createEvaluator(inputVal);
+    }
+
+    @Override
+    public void init(DataOutput state) throws AlgebricksException {
+        try {
+            state.writeDouble(0.0);
+            state.writeLong(0);
+            state.writeBoolean(false);
+        } catch (IOException e) {
+            throw new AlgebricksException(e);
+        }
+    }
+
+    @Override
+    public void step(IFrameTupleReference tuple, byte[] state, int start, int len) throws AlgebricksException {
+        inputVal.reset();
+        eval.evaluate(tuple);
+        double sum = BufferSerDeUtil.getDouble(state, start);
+        long count = BufferSerDeUtil.getLong(state, start + 8);
+        if (inputVal.getLength() > 0) {
+            ATypeTag typeTag = EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(inputVal.getByteArray()[0]);
+            if (typeTag != ATypeTag.NULL) {
+                ++count;
+            }
+            switch (typeTag) {
+                case INT8: {
+                    byte val = AInt8SerializerDeserializer.getByte(inputVal.getByteArray(), 1);
+                    sum += val;
+                    break;
+                }
+                case INT16: {
+                    short val = AInt16SerializerDeserializer.getShort(inputVal.getByteArray(), 1);
+                    sum += val;
+                    break;
+                }
+                case INT32: {
+                    int val = AInt32SerializerDeserializer.getInt(inputVal.getByteArray(), 1);
+                    sum += val;
+                    break;
+                }
+                case INT64: {
+                    long val = AInt64SerializerDeserializer.getLong(inputVal.getByteArray(), 1);
+                    sum += val;
+                    break;
+                }
+                case FLOAT: {
+                    float val = AFloatSerializerDeserializer.getFloat(inputVal.getByteArray(), 1);
+                    sum += val;
+                    break;
+                }
+                case DOUBLE: {
+                    double val = ADoubleSerializerDeserializer.getDouble(inputVal.getByteArray(), 1);
+                    sum += val;
+                    break;
+                }
+                case NULL: {
+                    processNull(state, start);
+                    break;
+                }
+                default: {
+                    throw new NotImplementedException("Cannot compute AVG for values of type " + typeTag);
+                }
+            }
+            inputVal.reset();
+        }
+        BufferSerDeUtil.writeDouble(sum, state, start);
+        BufferSerDeUtil.writeLong(count, state, start + 8);
+    }
+
+    @Override
+    public void finish(byte[] state, int start, int len, DataOutput result) throws AlgebricksException {
+        double sum = BufferSerDeUtil.getDouble(state, start);
+        long count = BufferSerDeUtil.getLong(state, start + 8);
+        boolean metNull = BufferSerDeUtil.getBoolean(state, start + 16);
+
+        if (count == 0) {
+            GlobalConfig.ASTERIX_LOGGER.fine("AVG aggregate ran over empty input.");
+        } else {
+            try {
+                if (metNull)
+                    nullSerde.serialize(ANull.NULL, result);
+                else {
+                    aDouble.setValue(sum / count);
+                    doubleSerde.serialize(aDouble, result);
+                }
+            } catch (IOException e) {
+                throw new AlgebricksException(e);
+            }
+        }
+    }
+
+    @Override
+    public void finishPartial(byte[] data, int start, int len, DataOutput partialResult) throws AlgebricksException {
+        try {
+            partialResult.write(data, start, len);
+        } catch (IOException e) {
+            throw new AlgebricksException(e);
+        }
+    }
+
+    protected void processNull(byte[] state, int start) {
+        boolean metNull = BufferSerDeUtil.getBoolean(state, start + 16);
+        metNull = true;
+        BufferSerDeUtil.writeBoolean(metNull, state, start + 16);
+    }
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/AbstractSerializableCountAggregateFunction.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/AbstractSerializableCountAggregateFunction.java
new file mode 100644
index 0000000..9388671
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/AbstractSerializableCountAggregateFunction.java
@@ -0,0 +1,105 @@
+/*
+ * Copyright 2009-2013 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.aggregates.serializable.std;
+
+import java.io.DataOutput;
+import java.io.IOException;
+
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.AInt64;
+import edu.uci.ics.asterix.om.base.AMutableInt64;
+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.om.types.EnumDeserializer;
+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.algebricks.runtime.base.ICopySerializableAggregateFunction;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+/**
+ * count(NULL) returns NULL.
+ */
+public abstract class AbstractSerializableCountAggregateFunction implements ICopySerializableAggregateFunction {
+    private AMutableInt64 result = new AMutableInt64(-1);
+    @SuppressWarnings("unchecked")
+    private ISerializerDeserializer<AInt64> int64Serde = AqlSerializerDeserializerProvider.INSTANCE
+            .getSerializerDeserializer(BuiltinType.AINT64);
+    @SuppressWarnings("unchecked")
+    private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
+            .getSerializerDeserializer(BuiltinType.ANULL);
+    private ArrayBackedValueStorage inputVal = new ArrayBackedValueStorage();
+    private ICopyEvaluator eval;
+
+    public AbstractSerializableCountAggregateFunction(ICopyEvaluatorFactory[] args) throws AlgebricksException {
+        eval = args[0].createEvaluator(inputVal);
+    }
+
+    @Override
+    public void init(DataOutput state) throws AlgebricksException {
+        try {
+            state.writeBoolean(false);
+            state.writeLong(0);
+        } catch (IOException e) {
+            throw new AlgebricksException(e);
+        }
+    }
+
+    @Override
+    public void step(IFrameTupleReference tuple, byte[] state, int start, int len) throws AlgebricksException {
+        boolean metNull = BufferSerDeUtil.getBoolean(state, start);
+        long cnt = BufferSerDeUtil.getLong(state, start + 1);
+        inputVal.reset();
+        eval.evaluate(tuple);
+        ATypeTag typeTag = EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(inputVal.getByteArray()[0]);
+        if (typeTag == ATypeTag.NULL) {
+            processNull(state, start);
+        } else {
+            cnt++;
+        }
+        BufferSerDeUtil.writeBoolean(metNull, state, start);
+        BufferSerDeUtil.writeLong(cnt, state, start + 1);
+    }
+
+    @Override
+    public void finish(byte[] state, int start, int len, DataOutput out) throws AlgebricksException {
+        boolean metNull = BufferSerDeUtil.getBoolean(state, start);
+        long cnt = BufferSerDeUtil.getLong(state, start + 1);
+        try {
+            if (metNull) {
+                nullSerde.serialize(ANull.NULL, out);
+            } else {
+                result.setValue(cnt);
+                int64Serde.serialize(result, out);
+            }
+        } catch (IOException e) {
+            throw new AlgebricksException(e);
+        }
+    }
+
+    @Override
+    public void finishPartial(byte[] state, int start, int len, DataOutput out) throws AlgebricksException {
+        finish(state, start, len, out);
+    }
+
+    protected void processNull(byte[] state, int start) {
+        boolean metNull = BufferSerDeUtil.getBoolean(state, start);
+        metNull = true;
+        BufferSerDeUtil.writeBoolean(metNull, state, start);
+    }
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/AbstractSerializableGlobalAvgAggregateFunction.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/AbstractSerializableGlobalAvgAggregateFunction.java
new file mode 100644
index 0000000..597f50b
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/AbstractSerializableGlobalAvgAggregateFunction.java
@@ -0,0 +1,302 @@
+/*
+ * Copyright 2009-2013 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.aggregates.serializable.std;
+
+import java.io.DataOutput;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+import edu.uci.ics.asterix.common.exceptions.AsterixException;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ADoubleSerializerDeserializer;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AFloatSerializerDeserializer;
+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.dataflow.data.nontagged.serde.ARecordSerializerDeserializer;
+import edu.uci.ics.asterix.formats.nontagged.AqlSerializerDeserializerProvider;
+import edu.uci.ics.asterix.om.base.ADouble;
+import edu.uci.ics.asterix.om.base.AInt64;
+import edu.uci.ics.asterix.om.base.AMutableDouble;
+import edu.uci.ics.asterix.om.base.AMutableInt64;
+import edu.uci.ics.asterix.om.base.ANull;
+import edu.uci.ics.asterix.om.types.ARecordType;
+import edu.uci.ics.asterix.om.types.ATypeTag;
+import edu.uci.ics.asterix.om.types.AUnionType;
+import edu.uci.ics.asterix.om.types.BuiltinType;
+import edu.uci.ics.asterix.om.types.EnumDeserializer;
+import edu.uci.ics.asterix.om.types.IAType;
+import edu.uci.ics.asterix.om.types.hierachy.ATypeHierarchy;
+import edu.uci.ics.asterix.runtime.evaluators.common.AccessibleByteArrayEval;
+import edu.uci.ics.asterix.runtime.evaluators.common.ClosedRecordConstructorEvalFactory.ClosedRecordConstructorEval;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.NotImplementedException;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopySerializableAggregateFunction;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
+import edu.uci.ics.hyracks.data.std.util.ByteArrayAccessibleOutputStream;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public abstract class AbstractSerializableGlobalAvgAggregateFunction implements ICopySerializableAggregateFunction {
+    private ArrayBackedValueStorage inputVal = new ArrayBackedValueStorage();
+    private ICopyEvaluator eval;
+    private AMutableDouble aDouble = new AMutableDouble(0);
+    private AMutableInt64 aInt64 = new AMutableInt64(0);
+    private final boolean isLocalAgg;
+
+    private ArrayBackedValueStorage avgBytes = new ArrayBackedValueStorage();
+    private ByteArrayAccessibleOutputStream sumBytes = new ByteArrayAccessibleOutputStream();
+    private DataOutput sumBytesOutput = new DataOutputStream(sumBytes);
+    private ByteArrayAccessibleOutputStream countBytes = new ByteArrayAccessibleOutputStream();
+    private DataOutput countBytesOutput = new DataOutputStream(countBytes);
+    private ICopyEvaluator evalSum = new AccessibleByteArrayEval(avgBytes.getDataOutput(), sumBytes);
+    private ICopyEvaluator evalCount = new AccessibleByteArrayEval(avgBytes.getDataOutput(), countBytes);
+    private ClosedRecordConstructorEval recordEval;
+
+    @SuppressWarnings("unchecked")
+    private ISerializerDeserializer<AInt64> int64Serde = AqlSerializerDeserializerProvider.INSTANCE
+            .getSerializerDeserializer(BuiltinType.AINT64);
+    @SuppressWarnings("unchecked")
+    private ISerializerDeserializer<ADouble> doubleSerde = AqlSerializerDeserializerProvider.INSTANCE
+            .getSerializerDeserializer(BuiltinType.ADOUBLE);
+    @SuppressWarnings("unchecked")
+    private ISerializerDeserializer<ANull> nullSerde = AqlSerializerDeserializerProvider.INSTANCE
+            .getSerializerDeserializer(BuiltinType.ANULL);
+
+    public AbstractSerializableGlobalAvgAggregateFunction(ICopyEvaluatorFactory[] args, boolean isLocalAgg)
+            throws AlgebricksException {
+        eval = args[0].createEvaluator(inputVal);
+        this.isLocalAgg = isLocalAgg;
+    }
+
+    @Override
+    public void init(DataOutput state) throws AlgebricksException {
+        try {
+            state.writeDouble(0.0);
+            state.writeLong(0);
+            state.writeByte(ATypeTag.SYSTEM_NULL.serialize());
+        } catch (IOException e) {
+            throw new AlgebricksException(e);
+        }
+    }
+
+    @Override
+    public void step(IFrameTupleReference tuple, byte[] state, int start, int len) throws AlgebricksException {
+        double sum = BufferSerDeUtil.getDouble(state, start);
+        long count = BufferSerDeUtil.getLong(state, start + 8);
+        ATypeTag aggType = EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(state[start + 16]);
+        inputVal.reset();
+        eval.evaluate(tuple);
+        byte[] serBytes = inputVal.getByteArray();
+        ATypeTag typeTag = EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(serBytes[0]);
+        if (typeTag == ATypeTag.NULL) {
+            processNull(state, start + 16);
+            return;
+        } else if (aggType == ATypeTag.NULL) {
+            return;
+        } else if (typeTag == ATypeTag.RECORD) {
+            // Global aggregate
+            if (isLocalAgg) {
+                throw new AlgebricksException("Record type can not be processed by in a local-avg operation.");
+            } else if (typeTag == ATypeTag.SYSTEM_NULL) {
+                // ignore
+                return;
+            }
+        } else if (aggType == ATypeTag.SYSTEM_NULL) {
+            aggType = typeTag;
+        } else if (typeTag != ATypeTag.SYSTEM_NULL && !ATypeHierarchy.isCompatible(typeTag, aggType)) {
+            throw new AlgebricksException("Unexpected type " + typeTag + " in aggregation input stream. Expected type "
+                    + aggType + ".");
+        } else if (ATypeHierarchy.canPromote(aggType, typeTag)) {
+            aggType = typeTag;
+        }
+
+        if (typeTag != ATypeTag.SYSTEM_NULL && typeTag != ATypeTag.RECORD) {
+            ++count;
+        }
+
+        switch (typeTag) {
+            case INT8: {
+                byte val = AInt8SerializerDeserializer.getByte(inputVal.getByteArray(), 1);
+                sum += val;
+                break;
+            }
+            case INT16: {
+                short val = AInt16SerializerDeserializer.getShort(inputVal.getByteArray(), 1);
+                sum += val;
+                break;
+            }
+            case INT32: {
+                int val = AInt32SerializerDeserializer.getInt(inputVal.getByteArray(), 1);
+                sum += val;
+                break;
+            }
+            case INT64: {
+                long val = AInt64SerializerDeserializer.getLong(inputVal.getByteArray(), 1);
+                sum += val;
+                break;
+            }
+            case FLOAT: {
+                float val = AFloatSerializerDeserializer.getFloat(inputVal.getByteArray(), 1);
+                sum += val;
+                break;
+            }
+            case DOUBLE: {
+                double val = ADoubleSerializerDeserializer.getDouble(inputVal.getByteArray(), 1);
+                sum += val;
+                break;
+            }
+            case NULL: {
+                break;
+            }
+            case SYSTEM_NULL: {
+                if (isLocalAgg) {
+                    throw new AlgebricksException("SYSTEM_NULL can not be processed by in a local-avg operation.");
+                }
+                break;
+            }
+            case RECORD: {
+                int offset1 = ARecordSerializerDeserializer.getFieldOffsetById(serBytes, 0, 1, true);
+                if (offset1 == 0) { // the sum is null
+                    aggType = ATypeTag.NULL;
+                    state[start + 16] = aggType.serialize();
+                } else {
+                    sum += ADoubleSerializerDeserializer.getDouble(serBytes, offset1);
+                }
+                int offset2 = ARecordSerializerDeserializer.getFieldOffsetById(serBytes, 1, 1, true);
+                if (offset2 != 0) { // the count is not null
+                    count += AInt64SerializerDeserializer.getLong(serBytes, offset2);
+                }
+                break;
+            }
+            default: {
+                throw new NotImplementedException("Cannot compute AVG for values of type " + typeTag);
+            }
+        }
+        BufferSerDeUtil.writeDouble(sum, state, start);
+        BufferSerDeUtil.writeLong(count, state, start + 8);
+    }
+
+    @Override
+    public void finish(byte[] state, int start, int len, DataOutput result) throws AlgebricksException {
+        double sum = BufferSerDeUtil.getDouble(state, start);
+        long count = BufferSerDeUtil.getLong(state, start + 8);
+        ATypeTag aggType = EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(state[start + 16]);
+        if (isLocalAgg) {
+            if (recordEval == null) {
+                List<IAType> unionList = new ArrayList<IAType>();
+                unionList.add(BuiltinType.ANULL);
+                unionList.add(BuiltinType.ADOUBLE);
+                ARecordType tmpRecType;
+                try {
+                    tmpRecType = new ARecordType(null, new String[] { "sum", "count" }, new IAType[] {
+                            new AUnionType(unionList, "OptionalDouble"), BuiltinType.AINT64 }, true);
+                } catch (AsterixException e) {
+                    throw new AlgebricksException(e);
+                }
+
+                ARecordType recType = tmpRecType;
+                recordEval = new ClosedRecordConstructorEval(recType, new ICopyEvaluator[] { evalSum, evalCount },
+                        avgBytes, result);
+            }
+            try {
+                if (count == 0 && aggType != ATypeTag.NULL) {
+                    result.writeByte(ATypeTag.SYSTEM_NULL.serialize());
+                    return;
+                }
+                if (aggType == ATypeTag.NULL) {
+                    sumBytes.reset();
+                    nullSerde.serialize(ANull.NULL, sumBytesOutput);
+                } else {
+                    sumBytes.reset();
+                    aDouble.setValue(sum);
+                    doubleSerde.serialize(aDouble, sumBytesOutput);
+                }
+                countBytes.reset();
+                aInt64.setValue(count);
+                int64Serde.serialize(aInt64, countBytesOutput);
+                recordEval.evaluate(null);
+            } catch (IOException e) {
+                throw new AlgebricksException(e);
+            }
+        } else {
+            try {
+                if (count == 0 || aggType == ATypeTag.NULL)
+                    nullSerde.serialize(ANull.NULL, result);
+                else {
+                    aDouble.setValue(sum / count);
+                    doubleSerde.serialize(aDouble, result);
+                }
+            } catch (IOException e) {
+                throw new AlgebricksException(e);
+            }
+        }
+    }
+
+    @Override
+    public void finishPartial(byte[] state, int start, int len, DataOutput result) throws AlgebricksException {
+        if (isLocalAgg) {
+            finish(state, start, len, result);
+        } else {
+            double globalSum = BufferSerDeUtil.getDouble(state, start);
+            long globalCount = BufferSerDeUtil.getLong(state, start + 8);
+            ATypeTag aggType = EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(state[start + 16]);
+            
+            if (recordEval == null) {
+                List<IAType> unionList = new ArrayList<IAType>();
+                unionList.add(BuiltinType.ANULL);
+                unionList.add(BuiltinType.ADOUBLE);
+                ARecordType _recType;
+                try {
+                    _recType = new ARecordType(null, new String[] { "sum", "count" }, new IAType[] {
+                            new AUnionType(unionList, "OptionalDouble"), BuiltinType.AINT64 }, true);
+                } catch (AsterixException e) {
+                    throw new AlgebricksException(e);
+                }
+
+                ARecordType recType = _recType;
+                recordEval = new ClosedRecordConstructorEval(recType, new ICopyEvaluator[] { evalSum, evalCount },
+                        avgBytes, result);
+            }
+            try {
+                if (globalCount == 0 ||  aggType == ATypeTag.NULL) {
+                    sumBytes.reset();
+                    nullSerde.serialize(ANull.NULL, sumBytesOutput);
+                } else {
+                    sumBytes.reset();
+                    aDouble.setValue(globalSum);
+                    doubleSerde.serialize(aDouble, sumBytesOutput);
+                }
+                countBytes.reset();
+                aInt64.setValue(globalCount);
+                int64Serde.serialize(aInt64, countBytesOutput);
+                recordEval.evaluate(null);
+            } catch (IOException e) {
+                throw new AlgebricksException(e);
+            }
+        }
+    }
+
+    protected void processNull(byte[] state, int start) {
+        ATypeTag aggType = EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(state[start]);
+        aggType = ATypeTag.NULL;
+        state[start] = aggType.serialize();
+    }
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/AbstractSerializableSumAggregateFunction.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/AbstractSerializableSumAggregateFunction.java
new file mode 100644
index 0000000..5ef6f23
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/AbstractSerializableSumAggregateFunction.java
@@ -0,0 +1,220 @@
+/*
+ * Copyright 2009-2013 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.aggregates.serializable.std;
+
+import java.io.DataOutput;
+import java.io.IOException;
+
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.ADoubleSerializerDeserializer;
+import edu.uci.ics.asterix.dataflow.data.nontagged.serde.AFloatSerializerDeserializer;
+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.AMutableDouble;
+import edu.uci.ics.asterix.om.base.AMutableFloat;
+import edu.uci.ics.asterix.om.base.AMutableInt16;
+import edu.uci.ics.asterix.om.base.AMutableInt32;
+import edu.uci.ics.asterix.om.base.AMutableInt64;
+import edu.uci.ics.asterix.om.base.AMutableInt8;
+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.om.types.EnumDeserializer;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.common.exceptions.NotImplementedException;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluator;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopySerializableAggregateFunction;
+import edu.uci.ics.hyracks.api.dataflow.value.ISerializerDeserializer;
+import edu.uci.ics.hyracks.data.std.util.ArrayBackedValueStorage;
+import edu.uci.ics.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public class AbstractSerializableSumAggregateFunction implements ICopySerializableAggregateFunction {
+    private ArrayBackedValueStorage inputVal = new ArrayBackedValueStorage();
+    private ICopyEvaluator eval;
+    private AMutableDouble aDouble = new AMutableDouble(0);
+    private AMutableFloat aFloat = new AMutableFloat(0);
+    private AMutableInt64 aInt64 = new AMutableInt64(0);
+    private AMutableInt32 aInt32 = new AMutableInt32(0);
+    private AMutableInt16 aInt16 = new AMutableInt16((short) 0);
+    private AMutableInt8 aInt8 = new AMutableInt8((byte) 0);
+    @SuppressWarnings("rawtypes")
+    private ISerializerDeserializer serde;
+    private final boolean isLocalAgg;
+
+    public AbstractSerializableSumAggregateFunction(ICopyEvaluatorFactory[] args, boolean isLocalAgg)
+            throws AlgebricksException {
+        eval = args[0].createEvaluator(inputVal);
+        this.isLocalAgg = isLocalAgg;
+    }
+
+    @Override
+    public void init(DataOutput state) throws AlgebricksException {
+        try {
+            state.writeByte(ATypeTag.SYSTEM_NULL.serialize());
+            state.writeDouble(0.0);
+        } catch (IOException e) {
+            throw new AlgebricksException(e);
+        }
+    }
+
+    @Override
+    public void step(IFrameTupleReference tuple, byte[] state, int start, int len) throws AlgebricksException {
+        ATypeTag aggType = EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(state[start]);
+        double sum = BufferSerDeUtil.getDouble(state, start + 1);
+        inputVal.reset();
+        eval.evaluate(tuple);
+        ATypeTag typeTag = EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(inputVal.getByteArray()[0]);
+        if (typeTag == ATypeTag.NULL) {
+            processNull(state, start);
+            return;
+        } else if (aggType == ATypeTag.NULL) {
+            return;
+        } else if (aggType == ATypeTag.SYSTEM_NULL) {
+            aggType = typeTag;
+        } else if (typeTag != ATypeTag.SYSTEM_NULL && typeTag != aggType) {
+            throw new AlgebricksException("Unexpected type " + typeTag + " in aggregation input stream. Expected type "
+                    + aggType + ".");
+        }
+        switch (typeTag) {
+            case INT8: {
+                byte val = AInt8SerializerDeserializer.getByte(inputVal.getByteArray(), 1);
+                sum += val;
+                break;
+            }
+            case INT16: {
+                short val = AInt16SerializerDeserializer.getShort(inputVal.getByteArray(), 1);
+                sum += val;
+                break;
+            }
+            case INT32: {
+                int val = AInt32SerializerDeserializer.getInt(inputVal.getByteArray(), 1);
+                sum += val;
+                break;
+            }
+            case INT64: {
+                long val = AInt64SerializerDeserializer.getLong(inputVal.getByteArray(), 1);
+                sum += val;
+                break;
+            }
+            case FLOAT: {
+                float val = AFloatSerializerDeserializer.getFloat(inputVal.getByteArray(), 1);
+                sum += val;
+                break;
+            }
+            case DOUBLE: {
+                double val = ADoubleSerializerDeserializer.getDouble(inputVal.getByteArray(), 1);
+                sum += val;
+                break;
+            }
+            case NULL: {
+                aggType = typeTag;
+                break;
+            }
+            case SYSTEM_NULL: {
+                // For global aggregates simply ignore system null here,
+                // but if all input value are system null, then we should return
+                // null in finish().
+                if (isLocalAgg) {
+                    throw new AlgebricksException("Type SYSTEM_NULL encountered in local aggregate.");
+                }
+                break;
+            }
+            default: {
+                throw new NotImplementedException("Cannot compute SUM for values of type " + typeTag + ".");
+            }
+        }
+        state[start] = aggType.serialize();
+        BufferSerDeUtil.writeDouble(sum, state, start + 1);
+    }
+
+    @SuppressWarnings("unchecked")
+    @Override
+    public void finish(byte[] state, int start, int len, DataOutput out) throws AlgebricksException {
+        ATypeTag aggType = EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(state[start]);
+        double sum = BufferSerDeUtil.getDouble(state, start + 1);
+        try {
+            switch (aggType) {
+                case INT8: {
+                    serde = AqlSerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.AINT8);
+                    aInt8.setValue((byte) sum);
+                    serde.serialize(aInt8, out);
+                    break;
+                }
+                case INT16: {
+                    serde = AqlSerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.AINT16);
+                    aInt16.setValue((short) sum);
+                    serde.serialize(aInt16, out);
+                    break;
+                }
+                case INT32: {
+                    serde = AqlSerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.AINT32);
+                    aInt32.setValue((int) sum);
+                    serde.serialize(aInt32, out);
+                    break;
+                }
+                case INT64: {
+                    serde = AqlSerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.AINT64);
+                    aInt64.setValue((long) sum);
+                    serde.serialize(aInt64, out);
+                    break;
+                }
+                case FLOAT: {
+                    serde = AqlSerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.AFLOAT);
+                    aFloat.setValue((float) sum);
+                    serde.serialize(aFloat, out);
+                    break;
+                }
+                case DOUBLE: {
+                    serde = AqlSerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.ADOUBLE);
+                    aDouble.setValue(sum);
+                    serde.serialize(aDouble, out);
+                    break;
+                }
+                case NULL: {
+                    serde = AqlSerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.ANULL);
+                    serde.serialize(ANull.NULL, out);
+                    break;
+                }
+                case SYSTEM_NULL: {
+                    // Empty stream. For local agg return system null. For global agg return null.
+                    if (isLocalAgg) {
+                        out.writeByte(ATypeTag.SYSTEM_NULL.serialize());
+                    } else {
+                        serde = AqlSerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.ANULL);
+                        serde.serialize(ANull.NULL, out);
+                    }
+                    break;
+                }
+            }
+        } catch (IOException e) {
+            throw new AlgebricksException(e);
+        }
+
+    }
+
+    @Override
+    public void finishPartial(byte[] state, int start, int len, DataOutput out) throws AlgebricksException {
+        finish(state, start, len, out);
+    }
+
+    protected void processNull(byte[] state, int start) {
+        ATypeTag aggType = EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(state[start]);
+        aggType = ATypeTag.NULL;
+        state[start] = aggType.serialize();
+    }
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/SerializableAvgAggregateFunction.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/SerializableAvgAggregateFunction.java
new file mode 100644
index 0000000..4f66c54
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/SerializableAvgAggregateFunction.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2009-2013 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.aggregates.serializable.std;
+
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+
+public class SerializableAvgAggregateFunction extends AbstractSerializableAvgAggregateFunction {
+
+    public SerializableAvgAggregateFunction(ICopyEvaluatorFactory[] args) throws AlgebricksException {
+        super(args);
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/SerializableCountAggregateFunction.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/SerializableCountAggregateFunction.java
new file mode 100644
index 0000000..7a6aacd
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/SerializableCountAggregateFunction.java
@@ -0,0 +1,27 @@
+/*
+ * Copyright 2009-2013 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.aggregates.serializable.std;
+
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+
+/**
+ * count(NULL) returns NULL.
+ */
+public class SerializableCountAggregateFunction extends AbstractSerializableCountAggregateFunction {
+    public SerializableCountAggregateFunction(ICopyEvaluatorFactory[] args) throws AlgebricksException {
+        super(args);
+    }
+}
\ No newline at end of file
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/SerializableGlobalAvgAggregateFunction.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/SerializableGlobalAvgAggregateFunction.java
new file mode 100644
index 0000000..1a69283
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/SerializableGlobalAvgAggregateFunction.java
@@ -0,0 +1,27 @@
+/*
+ * Copyright 2009-2013 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.aggregates.serializable.std;
+
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+
+public class SerializableGlobalAvgAggregateFunction extends AbstractSerializableGlobalAvgAggregateFunction {
+
+    public SerializableGlobalAvgAggregateFunction(ICopyEvaluatorFactory[] args, boolean isLocalAgg) throws AlgebricksException {
+        super(args, isLocalAgg);
+    }
+
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlAvgAggregateFunction.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlAvgAggregateFunction.java
new file mode 100644
index 0000000..0821ea0
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/SerializableGlobalSqlAvgAggregateFunction.java
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2009-2013 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.aggregates.serializable.std;
+
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+
+public class SerializableGlobalSqlAvgAggregateFunction extends AbstractSerializableGlobalAvgAggregateFunction {
+
+    public SerializableGlobalSqlAvgAggregateFunction(ICopyEvaluatorFactory[] args, boolean isLocalAgg) throws AlgebricksException {
+        super(args, isLocalAgg);
+    }
+
+    @Override
+    protected void processNull(byte[] state, int start) {
+    }
+    
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/SerializableLocalAvgAggregateFunction.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/SerializableLocalAvgAggregateFunction.java
new file mode 100644
index 0000000..aed5de2
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/SerializableLocalAvgAggregateFunction.java
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2009-2013 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.aggregates.serializable.std;
+
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+
+public class SerializableLocalAvgAggregateFunction extends AbstractSerializableGlobalAvgAggregateFunction {
+
+    public SerializableLocalAvgAggregateFunction(ICopyEvaluatorFactory[] args, boolean isLocalAgg) throws AlgebricksException {
+        super(args, isLocalAgg);
+    }
+
+    @Override
+    protected void processNull(byte[] state, int start) {
+    }
+    
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlAvgAggregateFunction.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlAvgAggregateFunction.java
new file mode 100644
index 0000000..94c2dd4
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/SerializableLocalSqlAvgAggregateFunction.java
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2009-2013 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.aggregates.serializable.std;
+
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+
+public class SerializableLocalSqlAvgAggregateFunction extends AbstractSerializableGlobalAvgAggregateFunction {
+
+    public SerializableLocalSqlAvgAggregateFunction(ICopyEvaluatorFactory[] args, boolean isLocalAgg) throws AlgebricksException {
+        super(args, isLocalAgg);
+    }
+
+    @Override
+    protected void processNull(byte[] state, int start) {
+    }
+    
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/SerializableSqlAvgAggregateFunction.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/SerializableSqlAvgAggregateFunction.java
new file mode 100644
index 0000000..b922308
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/SerializableSqlAvgAggregateFunction.java
@@ -0,0 +1,30 @@
+/*
+ * Copyright 2009-2013 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.aggregates.serializable.std;
+
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+
+public class SerializableSqlAvgAggregateFunction extends AbstractSerializableAvgAggregateFunction {
+
+    public SerializableSqlAvgAggregateFunction(ICopyEvaluatorFactory[] args) throws AlgebricksException {
+        super(args);
+    }
+
+    @Override
+    protected void processNull(byte[] state, int start) {
+    }
+    
+}
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/SerializableSqlCountAggregateFunction.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/SerializableSqlCountAggregateFunction.java
new file mode 100644
index 0000000..525b643
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/SerializableSqlCountAggregateFunction.java
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2009-2013 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.aggregates.serializable.std;
+
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+
+/**
+ * count(NULL) returns NULL.
+ */
+public class SerializableSqlCountAggregateFunction extends AbstractSerializableCountAggregateFunction {
+    public SerializableSqlCountAggregateFunction(ICopyEvaluatorFactory[] args) throws AlgebricksException {
+        super(args);
+    }
+
+    @Override
+    protected void processNull(byte[] state, int start) {
+    }
+}
\ No newline at end of file
diff --git a/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/SerializableSqlSumAggregateFunction.java b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/SerializableSqlSumAggregateFunction.java
new file mode 100644
index 0000000..9d6e46e
--- /dev/null
+++ b/asterix-runtime/src/main/java/edu/uci/ics/asterix/runtime/aggregates/serializable/std/SerializableSqlSumAggregateFunction.java
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2009-2013 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.aggregates.serializable.std;
+
+import edu.uci.ics.hyracks.algebricks.common.exceptions.AlgebricksException;
+import edu.uci.ics.hyracks.algebricks.runtime.base.ICopyEvaluatorFactory;
+
+public class SerializableSqlSumAggregateFunction extends AbstractSerializableSumAggregateFunction {
+
+    public SerializableSqlSumAggregateFunction(ICopyEvaluatorFactory[] args, boolean isLocalAgg)
+            throws AlgebricksException {
+        super(args, isLocalAgg);
+    }
+
+    @Override
+    protected void processNull(byte[] state, int start) {
+    }
+    
+}