org.apache.hadoop.hive.ql.udf.generic

Class GenericUDAFComputeBitVectorBase.StringStatsEvaluatorBase

java.lang.Object

org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator

org.apache.hadoop.hive.ql.udf.generic.GenericUDAFComputeBitVectorBase.StringStatsEvaluatorBase

All Implemented Interfaces:

Closeable, AutoCloseable

Direct Known Subclasses:

GenericUDAFComputeBitVectorFMSketch.GenericUDAFStringStatsEvaluator, GenericUDAFComputeBitVectorHLL.GenericUDAFStringStatsEvaluator

Enclosing class:

GenericUDAFComputeBitVectorBase

public abstract static class GenericUDAFComputeBitVectorBase.StringStatsEvaluatorBase
extends GenericUDAFEvaluator

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator

GenericUDAFEvaluator.AbstractAggregationBuffer, GenericUDAFEvaluator.AggregationBuffer, GenericUDAFEvaluator.AggregationType, GenericUDAFEvaluator.Mode

Field Summary

Fields

Modifier and Type	Field and Description
protected PrimitiveObjectInspector	inputOI
protected BinaryObjectInspector	ndvFieldOI
protected org.apache.hadoop.io.BytesWritable	partialResult
protected org.apache.hadoop.io.BytesWritable	result

Fields inherited from class org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator

partitionEvaluator

Constructor Summary

Constructors

Constructor and Description
StringStatsEvaluatorBase()

Method Summary

Modifier and Type	Method and Description
GenericUDAFEvaluator.AggregationBuffer	getNewAggregationBuffer() Get a new aggregation object.
void	merge(GenericUDAFEvaluator.AggregationBuffer agg, Object partial) Merge with partial aggregation result.
void	reset(GenericUDAFEvaluator.AggregationBuffer agg) Reset the aggregation.
Object	terminate(GenericUDAFEvaluator.AggregationBuffer agg) Get final aggregation result.
Object	terminatePartial(GenericUDAFEvaluator.AggregationBuffer agg) Get partial aggregation result.

Methods inherited from class org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator

aggregate, close, configure, createPartitionEvaluator, estimate, evaluate, getExprString, getPartitionWindowingEvaluator, getWindowingEvaluator, init, isEstimable, iterate

Methods inherited from class java.lang.Object

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

Field Detail

inputOI

protected transient PrimitiveObjectInspector inputOI

ndvFieldOI

protected transient BinaryObjectInspector ndvFieldOI

partialResult

protected transient org.apache.hadoop.io.BytesWritable partialResult

result

protected transient org.apache.hadoop.io.BytesWritable result

Constructor Detail

StringStatsEvaluatorBase

public StringStatsEvaluatorBase()

Method Detail

getNewAggregationBuffer

public GenericUDAFEvaluator.AggregationBuffer getNewAggregationBuffer()
                                                               throws HiveException

Description copied from class: GenericUDAFEvaluator

Get a new aggregation object.

Specified by:

getNewAggregationBuffer in class GenericUDAFEvaluator

Throws:

HiveException

reset

public void reset(GenericUDAFEvaluator.AggregationBuffer agg)
           throws HiveException

Description copied from class: GenericUDAFEvaluator

Reset the aggregation. This is useful if we want to reuse the same aggregation.

Specified by:

reset in class GenericUDAFEvaluator

Throws:

HiveException

merge

public void merge(GenericUDAFEvaluator.AggregationBuffer agg,
                  Object partial)
           throws HiveException

Description copied from class: GenericUDAFEvaluator

Merge with partial aggregation result. NOTE: null might be passed in case there is no input data.

Specified by:

merge in class GenericUDAFEvaluator

partial - The partial aggregation result.

Throws:

HiveException

terminatePartial

public Object terminatePartial(GenericUDAFEvaluator.AggregationBuffer agg)
                        throws HiveException

Description copied from class: GenericUDAFEvaluator

Get partial aggregation result.

Specified by:

terminatePartial in class GenericUDAFEvaluator

Returns:

partial aggregation result.

Throws:

HiveException

terminate

public Object terminate(GenericUDAFEvaluator.AggregationBuffer agg)
                 throws HiveException

Description copied from class: GenericUDAFEvaluator

Get final aggregation result.

Specified by:

terminate in class GenericUDAFEvaluator

Returns:

final aggregation result.

Throws:

HiveException