org.apache.datasketches.hive.tuple

Class UnionSketchUDAF

java.lang.Object

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

org.apache.datasketches.hive.tuple.UnionSketchUDAF

All Implemented Interfaces:

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

Direct Known Subclasses:

UnionDoubleSummarySketchUDAF, UnionDoubleSummaryWithModeSketchUDAF

public abstract class UnionSketchUDAF
extends org.apache.hadoop.hive.ql.udf.generic.AbstractGenericUDAFResolver

Generic implementation to be sub-classed with a particular type of Summary

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	UnionSketchUDAF.UnionSketchEvaluator<S extends org.apache.datasketches.tuple.Summary>

Constructor Summary

Constructors

Constructor and Description
UnionSketchUDAF()

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
abstract 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

UnionSketchUDAF

public UnionSketchUDAF()

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

Throws:

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

checkExtraArguments

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

Override this if your UDF has more arguments

Parameters:

inspectors - array of inspectors

Throws:

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

createEvaluator

public abstract 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.

Returns:

an instance of evaluator