org.apache.pig.piggybank.evaluation.math
Class POW

java.lang.Object
  extended by org.apache.pig.EvalFunc<Double>
      extended by org.apache.pig.piggybank.evaluation.math.Base
          extended by org.apache.pig.piggybank.evaluation.math.DoubleDoubleBase
              extended by org.apache.pig.piggybank.evaluation.math.POW

public class POW
extends DoubleDoubleBase

math.POW implements a binding to the Java function Math.pow(double,double). Given a tuple with two data atom it Returns the the value of the first argument raised to the power of the second argument.

Parameters:
value - Tuple containing two Double.
Return Value:
Double
Return Schema:
POW_inputSchema
Example:
register math.jar;
A = load 'mydata' using PigStorage() as ( float1 );
B = foreach A generate float1, math.POW(float1);

Author:
ajay garg
See Also:
Math.pow(double,double),

Nested Class Summary
 
Nested classes/interfaces inherited from class org.apache.pig.EvalFunc
EvalFunc.SchemaType
 
Field Summary
 
Fields inherited from class org.apache.pig.EvalFunc
log, pigLogger, reporter, returnType
 
Constructor Summary
POW()
           
 
Method Summary
 
Methods inherited from class org.apache.pig.piggybank.evaluation.math.DoubleDoubleBase
exec, getArgToFuncMapping
 
Methods inherited from class org.apache.pig.piggybank.evaluation.math.Base
outputSchema
 
Methods inherited from class org.apache.pig.EvalFunc
finish, getCacheFiles, getInputSchema, getLogger, getPigLogger, getReporter, getReturnType, getSchemaName, getSchemaType, isAsynchronous, progress, setInputSchema, setPigLogger, setReporter, setUDFContextSignature, warn
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

POW

public POW()


Copyright © 2007-2012 The Apache Software Foundation