org.apache.datasketches.hive.tuple

Class UnionDoubleSummarySketchUDAF

java.lang.Object

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

org.apache.datasketches.hive.tuple.UnionSketchUDAF

org.apache.datasketches.hive.tuple.UnionDoubleSummarySketchUDAF

All Implemented Interfaces:

org.apache.hadoop.hive.ql.udf.generic.GenericUDAFResolver, org.apache.hadoop.hive.ql.udf.generic.GenericUDAFResolver2

public class UnionDoubleSummarySketchUDAF
extends UnionSketchUDAF

This simple implementation is to give an example of a concrete UDAF based on the abstract UnionSketchUDAF if no extra arguments are needed.. The same functionality is included into UnionDoubleSummaryWithModeSketchUDAF with the default summary mode of Sum, but the implementation is more complex because of the extra argument.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	UnionDoubleSummarySketchUDAF.UnionDoubleSummarySketchEvaluator

Nested classes/interfaces inherited from class org.apache.datasketches.hive.tuple.UnionSketchUDAF

UnionSketchUDAF.UnionSketchEvaluator<S extends org.apache.datasketches.tuple.Summary>

Constructor Summary

Constructors

Constructor and Description
UnionDoubleSummarySketchUDAF()

Method Summary

Modifier and Type	Method and Description
org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator	createEvaluator() This is needed because a concrete UDAF is going to have its own concrete evaluator static inner class.

Methods inherited from class org.apache.datasketches.hive.tuple.UnionSketchUDAF

checkExtraArguments, getEvaluator

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

getEvaluator

Methods inherited from class java.lang.Object

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

Constructor Detail

UnionDoubleSummarySketchUDAF

public UnionDoubleSummarySketchUDAF()

Method Detail

createEvaluator

public org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator createEvaluator()

Description copied from class: UnionSketchUDAF

This is needed because a concrete UDAF is going to have its own concrete evaluator static inner class.

Specified by:

createEvaluator in class UnionSketchUDAF

Returns:

an instance of evaluator