org.apache.hadoop.hive.ql.udf

Class UDAFPercentile.PercentileLongEvaluator

java.lang.Object

org.apache.hadoop.hive.ql.udf.UDAFPercentile.PercentileLongEvaluator

All Implemented Interfaces:

UDAFEvaluator

Enclosing class:

UDAFPercentile

public static class UDAFPercentile.PercentileLongEvaluator
extends Object
implements UDAFEvaluator

The evaluator for percentile computation based on long.

Constructor Summary

Constructors

Constructor and Description
PercentileLongEvaluator()

Method Summary

Modifier and Type	Method and Description
void	init() Initializer.
boolean	iterate(org.apache.hadoop.io.LongWritable o, Double percentile) Note that percentile can be null in a global aggregation with 0 input rows: "select percentile(col, 0.5) from t where false" In that case, iterate(null, null) will be called once.
boolean	merge(UDAFPercentile.State other)
DoubleWritable	terminate()
UDAFPercentile.State	terminatePartial()

Methods inherited from class java.lang.Object

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

Constructor Detail

PercentileLongEvaluator

public PercentileLongEvaluator()

Method Detail

init

public void init()

Description copied from interface: UDAFEvaluator

Initializer. Initializes the state for the evaluator.

Specified by:

init in interface UDAFEvaluator

iterate

public boolean iterate(org.apache.hadoop.io.LongWritable o,
                       Double percentile)

Note that percentile can be null in a global aggregation with 0 input rows: "select percentile(col, 0.5) from t where false" In that case, iterate(null, null) will be called once.

terminatePartial

public UDAFPercentile.State terminatePartial()

merge

public boolean merge(UDAFPercentile.State other)

terminate

public DoubleWritable terminate()