Package org.apache.drill.exec.udfs

Class StringDistanceFunctions.FuzzyScoreFunction

java.lang.Object

org.apache.drill.exec.udfs.StringDistanceFunctions.FuzzyScoreFunction

All Implemented Interfaces:

DrillFunc, DrillSimpleFunc

Enclosing class:

StringDistanceFunctions

public static class StringDistanceFunctions.FuzzyScoreFunction
extends Object
implements DrillSimpleFunc

This function calculates the cosine distance between two strings. A matching algorithm that is similar to the searching algorithms implemented in editors such as Sublime Text, TextMate, Atom and others.

One point is given for every matched character. Subsequent matches yield two bonus points. A higher score indicates a higher similarity.

Usage: SELECT fuzzy_score( string1, string2 ) AS fuzzy_score FROM...

Constructor Summary

Constructors

Constructor	Description
FuzzyScoreFunction()

Method Summary

Modifier and Type	Method	Description
void	eval()
void	setup()

Methods inherited from class java.lang.Object

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

Constructor Details

FuzzyScoreFunction

public FuzzyScoreFunction()

Method Details

setup

public void setup()

Specified by:

setup in interface DrillSimpleFunc

eval

public void eval()

Specified by:

eval in interface DrillSimpleFunc