org.apache.hadoop.hive.ql.exec.vector.expressions.aggregates
Class VectorUDAFCountStar

java.lang.Object
  org.apache.hadoop.hive.ql.exec.vector.expressions.aggregates.VectorAggregateExpression
      org.apache.hadoop.hive.ql.exec.vector.expressions.aggregates.VectorUDAFCountStar

All Implemented Interfaces:

Serializable

public class VectorUDAFCountStar
extends VectorAggregateExpression

VectorUDAFCountStar. Vectorized implementation for COUNT(*) aggregates.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.hive.ql.exec.vector.expressions.aggregates.VectorAggregateExpression

VectorAggregateExpression.AggregationBuffer

Constructor Summary

VectorUDAFCountStar()

VectorUDAFCountStar(VectorExpression inputExpression)

Method Summary

void	aggregateInput(VectorAggregateExpression.AggregationBuffer agg, VectorizedRowBatch batch)
void	aggregateInputSelection(VectorAggregationBufferRow[] aggregationBufferSets, int aggregateIndex, VectorizedRowBatch batch)
Object	evaluateOutput(VectorAggregateExpression.AggregationBuffer agg)
int	getAggregationBufferFixedSize()
VectorAggregateExpression.AggregationBuffer	getNewAggregationBuffer()
ObjectInspector	getOutputObjectInspector()
void	init(AggregationDesc desc)
void	reset(VectorAggregateExpression.AggregationBuffer agg)

Methods inherited from class org.apache.hadoop.hive.ql.exec.vector.expressions.aggregates.VectorAggregateExpression

hasVariableSize

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

VectorUDAFCountStar

public VectorUDAFCountStar(VectorExpression inputExpression)

VectorUDAFCountStar

public VectorUDAFCountStar()

Method Detail

aggregateInputSelection

public void aggregateInputSelection(VectorAggregationBufferRow[] aggregationBufferSets,
                                    int aggregateIndex,
                                    VectorizedRowBatch batch)
                             throws HiveException

Specified by:

aggregateInputSelection in class VectorAggregateExpression

Throws:

HiveException

aggregateInput

public void aggregateInput(VectorAggregateExpression.AggregationBuffer agg,
                           VectorizedRowBatch batch)
                    throws HiveException

Specified by:

aggregateInput in class VectorAggregateExpression

Throws:

HiveException

getNewAggregationBuffer

public VectorAggregateExpression.AggregationBuffer getNewAggregationBuffer()
                                                                    throws HiveException

Specified by:

getNewAggregationBuffer in class VectorAggregateExpression

Throws:

HiveException

reset

public void reset(VectorAggregateExpression.AggregationBuffer agg)
           throws HiveException

Specified by:

reset in class VectorAggregateExpression

Throws:

HiveException

evaluateOutput

public Object evaluateOutput(VectorAggregateExpression.AggregationBuffer agg)
                      throws HiveException

Specified by:

evaluateOutput in class VectorAggregateExpression

Throws:

HiveException

getOutputObjectInspector

public ObjectInspector getOutputObjectInspector()

Specified by:

getOutputObjectInspector in class VectorAggregateExpression

getAggregationBufferFixedSize

public int getAggregationBufferFixedSize()

Specified by:

getAggregationBufferFixedSize in class VectorAggregateExpression

init

public void init(AggregationDesc desc)
          throws HiveException

Specified by:

init in class VectorAggregateExpression

Throws:

HiveException