org.apache.datasketches.hive.hll

Class SketchToEstimateUDF

java.lang.Object

org.apache.hadoop.hive.ql.exec.UDF

org.apache.datasketches.hive.hll.SketchToEstimateUDF

public class SketchToEstimateUDF
extends org.apache.hadoop.hive.ql.exec.UDF

Constructor Summary

Constructors

Constructor and Description
SketchToEstimateUDF()

Method Summary

Modifier and Type	Method and Description
Double	evaluate(org.apache.hadoop.io.BytesWritable serializedSketch) Get an estimate from a given HllSketch

Methods inherited from class org.apache.hadoop.hive.ql.exec.UDF

getRequiredFiles, getRequiredJars, getResolver, setResolver

Methods inherited from class java.lang.Object

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

Constructor Detail

SketchToEstimateUDF

public SketchToEstimateUDF()

Method Detail

evaluate

public Double evaluate(org.apache.hadoop.io.BytesWritable serializedSketch)

Get an estimate from a given HllSketch

Parameters:

serializedSketch - HllSketch in a serialized binary form

Returns:

estimate of unique count