org.apache.datasketches.hive.tuple

Class DataToDoubleSummaryWithModeSketchUDAF

java.lang.Object

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

org.apache.datasketches.hive.tuple.DataToSketchUDAF

org.apache.datasketches.hive.tuple.DataToDoubleSummaryWithModeSketchUDAF

All Implemented Interfaces:

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

public class DataToDoubleSummaryWithModeSketchUDAF
extends DataToSketchUDAF

This is an example of a concrete UDAF based on the abstract DataToSketchUDAF if extra arguments are needed. For a simpler example with no extra arguments see DataToDoubleSummarySketchUDAF.

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
DataToDoubleSummaryWithModeSketchUDAF()

Method Summary

Modifier and Type	Method and Description
protected void	checkExtraArguments(org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector[] inspectors) Override this if your UDF has more arguments
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.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

DataToDoubleSummaryWithModeSketchUDAF

public DataToDoubleSummaryWithModeSketchUDAF()

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

checkExtraArguments

protected void checkExtraArguments(org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector[] inspectors)
                            throws org.apache.hadoop.hive.ql.parse.SemanticException

Description copied from class: DataToSketchUDAF

Override this if your UDF has more arguments

Overrides:

checkExtraArguments in class DataToSketchUDAF

Parameters:

inspectors - array of inspectors

Throws:

org.apache.hadoop.hive.ql.parse.SemanticException - if anything is wrong