hyracks/hyracks-dataflow-std/src/main/java/org/apache/hyracks/dataflow/std/group/aggregators/AvgFieldGroupAggregatorFactory.java [47:109]:
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        this.aggField = aggField;
        this.useObjectState = useObjectState;
    }

    /*
     * (non-Javadoc)
     *
     * @see org.apache.hyracks.dataflow.std.aggregations.
     * IFieldAggregateDescriptorFactory
     * #createAggregator(org.apache.hyracks.api.context.IHyracksTaskContext,
     * org.apache.hyracks.api.dataflow.value.RecordDescriptor,
     * org.apache.hyracks.api.dataflow.value.RecordDescriptor)
     */
    @Override
    public IFieldAggregateDescriptor createAggregator(IHyracksTaskContext ctx, RecordDescriptor inRecordDescriptor,
            RecordDescriptor outRecordDescriptor) throws HyracksDataException {

        return new IFieldAggregateDescriptor() {

            @Override
            public void reset() {
            }

            @Override
            public void outputPartialResult(DataOutput fieldOutput, byte[] data, int offset, AggregateState state)
                    throws HyracksDataException {
                int sum, count;
                if (!useObjectState) {
                    sum = IntegerPointable.getInteger(data, offset);
                    count = IntegerPointable.getInteger(data, offset + 4);
                } else {
                    Integer[] fields = (Integer[]) state.state;
                    sum = fields[0];
                    count = fields[1];
                }
                try {
                    fieldOutput.writeInt(sum);
                    fieldOutput.writeInt(count);
                } catch (IOException e) {
                    throw new HyracksDataException("I/O exception when writing aggregation to the output buffer.");
                }
            }

            @Override
            public void outputFinalResult(DataOutput fieldOutput, byte[] data, int offset, AggregateState state)
                    throws HyracksDataException {
                int sum, count;
                if (!useObjectState) {
                    sum = IntegerPointable.getInteger(data, offset);
                    count = IntegerPointable.getInteger(data, offset + 4);
                } else {
                    Integer[] fields = (Integer[]) state.state;
                    sum = fields[0];
                    count = fields[1];
                }
                try {
                    fieldOutput.writeFloat((float) sum / count);
                } catch (IOException e) {
                    throw new HyracksDataException("I/O exception when writing aggregation to the output buffer.");
                }
            }

            @Override
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hyracks/hyracks-dataflow-std/src/main/java/org/apache/hyracks/dataflow/std/group/aggregators/AvgFieldMergeAggregatorFactory.java [47:109]:
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        this.aggField = aggField;
        this.useObjectState = useObjectState;
    }

    /*
     * (non-Javadoc)
     *
     * @see org.apache.hyracks.dataflow.std.aggregations.
     * IFieldAggregateDescriptorFactory
     * #createAggregator(org.apache.hyracks.api.context.IHyracksTaskContext,
     * org.apache.hyracks.api.dataflow.value.RecordDescriptor,
     * org.apache.hyracks.api.dataflow.value.RecordDescriptor)
     */
    @Override
    public IFieldAggregateDescriptor createAggregator(IHyracksTaskContext ctx, RecordDescriptor inRecordDescriptor,
            RecordDescriptor outRecordDescriptor) throws HyracksDataException {

        return new IFieldAggregateDescriptor() {

            @Override
            public void reset() {
            }

            @Override
            public void outputPartialResult(DataOutput fieldOutput, byte[] data, int offset, AggregateState state)
                    throws HyracksDataException {
                int sum, count;
                if (!useObjectState) {
                    sum = IntegerPointable.getInteger(data, offset);
                    count = IntegerPointable.getInteger(data, offset + 4);
                } else {
                    Integer[] fields = (Integer[]) state.state;
                    sum = fields[0];
                    count = fields[1];
                }
                try {
                    fieldOutput.writeInt(sum);
                    fieldOutput.writeInt(count);
                } catch (IOException e) {
                    throw new HyracksDataException("I/O exception when writing aggregation to the output buffer.");
                }
            }

            @Override
            public void outputFinalResult(DataOutput fieldOutput, byte[] data, int offset, AggregateState state)
                    throws HyracksDataException {
                int sum, count;
                if (!useObjectState) {
                    sum = IntegerPointable.getInteger(data, offset);
                    count = IntegerPointable.getInteger(data, offset + 4);
                } else {
                    Integer[] fields = (Integer[]) state.state;
                    sum = fields[0];
                    count = fields[1];
                }
                try {
                    fieldOutput.writeFloat((float) sum / count);
                } catch (IOException e) {
                    throw new HyracksDataException("I/O exception when writing aggregation to the output buffer.");
                }
            }

            @Override
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