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

java.lang.Object
  org.apache.pig.EvalFunc<Double>
      org.apache.pig.piggybank.evaluation.math.DoubleNextAfter

public class DoubleNextAfter
extends EvalFunc<Double>

math.nextAfter implements a binding to the Java function Math.nextAfter(double,double). Given a tuple with two data atom it Returns the floating-point number adjacent to the first argument in the direction of the second argument.

Parameters:

value - Tuple containing two double.

Return Value:

double

Return Schema:

nextAfter_inputSchema

Example:

register math.jar;
A = load 'mydata' using PigStorage() as ( float1 );
B = foreach A generate float1, math.nextAfter(float1);

Author:

ajay garg

See Also:

Math.nextAfter(double,double),

Field Summary

Fields inherited from class org.apache.pig.EvalFunc

log, pigLogger, reporter, returnType

Constructor Summary

DoubleNextAfter()

Method Summary

Double	exec(Tuple input) java level API
Schema	outputSchema(Schema input) Report the schema of the output of this UDF.

Methods inherited from class org.apache.pig.EvalFunc

finish, getArgToFuncMapping, getCacheFiles, 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

DoubleNextAfter

public DoubleNextAfter()

Method Detail

exec

public Double exec(Tuple input)
            throws IOException

java level API

Specified by:

exec in class EvalFunc<Double>

Parameters:

input - expects a tuple containing two numeric DataAtom value

output - returns a single numeric DataAtom value, which is the floating-point number adjacent to the first argument in the direction of the second argument.

Returns:

result, of type T.

Throws:

IOException

outputSchema

public Schema outputSchema(Schema input)

Description copied from class: EvalFunc

Report the schema of the output of this UDF. Pig will make use of this in error checking, optimization, and planning. The schema of input data to this UDF is provided.

Overrides:

outputSchema in class EvalFunc<Double>

Parameters:

input - Schema of the input

Returns:

Schema of the output