org.apache.datasketches.hive.tuple

Class DataToDoubleSummarySketchUDAF

java.lang.Object

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

org.apache.datasketches.hive.tuple.DataToSketchUDAF

org.apache.datasketches.hive.tuple.DataToDoubleSummarySketchUDAF

All Implemented Interfaces:

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

public class DataToDoubleSummarySketchUDAF
extends DataToSketchUDAF

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

Nested Class Summary

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

DataToSketchUDAF.DataToSketchEvaluator<U,S extends org.apache.datasketches.tuple.UpdatableSummary<U>>

Constructor Summary

Constructors

Constructor and Description
DataToDoubleSummarySketchUDAF()

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.
org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator	getEvaluator(org.apache.hadoop.hive.ql.udf.generic.GenericUDAFParameterInfo info)

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

checkExtraArguments

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

DataToDoubleSummarySketchUDAF

public DataToDoubleSummarySketchUDAF()

Method Detail

getEvaluator

public org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator getEvaluator(org.apache.hadoop.hive.ql.udf.generic.GenericUDAFParameterInfo info)
                                                                        throws org.apache.hadoop.hive.ql.parse.SemanticException

Specified by:

getEvaluator in interface org.apache.hadoop.hive.ql.udf.generic.GenericUDAFResolver2

Overrides:

getEvaluator in class DataToSketchUDAF

Throws:

org.apache.hadoop.hive.ql.parse.SemanticException

createEvaluator

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

Description copied from class: DataToSketchUDAF

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

Specified by:

createEvaluator in class DataToSketchUDAF

Returns:

an instance of evaluator