org.apache.datasketches.hive.theta

Class EstimateSketchSimilarityUDF

java.lang.Object

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

org.apache.datasketches.hive.theta.EstimateSketchSimilarityUDF

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

Hive estimate sketch similarity UDF.

Constructor Summary

Constructors

Constructor and Description
EstimateSketchSimilarityUDF()

Method Summary

Modifier and Type	Method and Description
double	evaluate(org.apache.hadoop.io.BytesWritable firstSketchBytes, org.apache.hadoop.io.BytesWritable secondSketchBytes) Main logic called by hive.

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

EstimateSketchSimilarityUDF

public EstimateSketchSimilarityUDF()

Method Detail

evaluate

public double evaluate(org.apache.hadoop.io.BytesWritable firstSketchBytes,
                       org.apache.hadoop.io.BytesWritable secondSketchBytes)

Main logic called by hive. Computes the jaccard similarity of two sketches of same or different column.

Parameters:

firstSketchBytes - first sketch to be compared.

secondSketchBytes - second sketch to be compared.

Returns:

the estimate of similarity of two sketches