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

java.lang.Object
  extended by org.apache.pig.EvalFunc<Long>
      extended by org.apache.pig.piggybank.evaluation.math.LongAbs

public class LongAbs
extends EvalFunc<Long>

math.ABS implements a binding to the Java function Math.abs(long) for computing the absolute value of the argument. The returned value will be an long which is absolute value of the input.

Parameters:
value - long.
Return Value:
long absolute value of input
Return Schema:
abs_inputSchema
Example:
register math.jar;
A = load 'mydata' using PigStorage() as ( float1 );
B = foreach A generate float1, math.ABS(float1);

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

Field Summary
 
Fields inherited from class org.apache.pig.EvalFunc
log, pigLogger, reporter, returnType
 
Constructor Summary
LongAbs()
           
 
Method Summary
 Long exec(Tuple input)
          java level API
 Schema outputSchema(Schema input)
           
 
Methods inherited from class org.apache.pig.EvalFunc
finish, getArgToFuncMapping, getLogger, getPigLogger, getReporter, getReturnType, getSchemaName, isAsynchronous, progress, setPigLogger, setReporter, warn
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

LongAbs

public LongAbs()
Method Detail

exec

public Long exec(Tuple input)
          throws IOException
java level API

Specified by:
exec in class EvalFunc<Long>
Parameters:
input - expects a single numeric value
output - returns a single numeric value, absolute value of the argument
Returns:
result, of type T.
Throws:
IOException

outputSchema

public Schema outputSchema(Schema input)
Overrides:
outputSchema in class EvalFunc<Long>
Parameters:
input - Schema of the input
Returns:
Schema of the output


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