org.apache.datasketches.hive.kll

Class GetRankUDF

java.lang.Object

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

org.apache.datasketches.hive.kll.GetRankUDF

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

Constructor Summary

Constructors

Constructor and Description
GetRankUDF()

Method Summary

Modifier and Type	Method and Description
Double	evaluate(org.apache.hadoop.io.BytesWritable serializedSketch, Boolean inclusive, float value) Returns a normalized rank of a given value from a given sketch
Double	evaluate(org.apache.hadoop.io.BytesWritable serializedSketch, float value) Returns a normalized rank of a given value from a given sketch

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

GetRankUDF

public GetRankUDF()

Method Detail

evaluate

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

Returns a normalized rank of a given value from a given sketch

Parameters:

serializedSketch - serialized sketch

value - the given value

Returns:

rank

evaluate

public Double evaluate(org.apache.hadoop.io.BytesWritable serializedSketch,
                       Boolean inclusive,
                       float value)

Returns a normalized rank of a given value from a given sketch

Parameters:

serializedSketch - serialized sketch

inclusive - if true the weight of the given item is included into the rank. Otherwise the rank equals the sum of the weights of all items that are less than the given item

value - the given value

Returns:

rank