org.apache.pig.builtin
Class DoubleMax

java.lang.Object
  org.apache.pig.EvalFunc<T>
      org.apache.pig.builtin.AlgebraicDoubleMathBase
          org.apache.pig.builtin.DoubleMax

All Implemented Interfaces:

Accumulator<Double>, Algebraic

public class DoubleMax
extends AlgebraicDoubleMathBase

This method should never be used directly, use MAX.

Nested Class Summary

static class	AlgebraicMathBase.Initial
protected static class	AlgebraicMathBase.KNOWN_OP
protected static interface	AlgebraicMathBase.KnownOpProvider
static class	DoubleMax.Final
static class	DoubleMax.Intermediate

Nested classes/interfaces inherited from class org.apache.pig.EvalFunc

EvalFunc.SchemaType

Field Summary

protected AlgebraicMathBase.KnownOpProvider

opProvider

Fields inherited from class org.apache.pig.EvalFunc

log, pigLogger, reporter, returnType

Constructor Summary

DoubleMax()

Method Summary

String	getFinal() Get the final function.
String	getInitial() Get the initial function.
String	getIntermed() Get the intermediate function.
protected void	setOp(AlgebraicMathBase.KNOWN_OP op)

Methods inherited from class org.apache.pig.builtin.AlgebraicDoubleMathBase

accumulate, cleanup, doTupleWork, exec, getSeed, getValue, outputSchema

Methods inherited from class org.apache.pig.EvalFunc

finish, getArgToFuncMapping, 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

Field Detail

opProvider

protected AlgebraicMathBase.KnownOpProvider opProvider

Constructor Detail

DoubleMax

public DoubleMax()

Method Detail

setOp

protected void setOp(AlgebraicMathBase.KNOWN_OP op)

getInitial

public String getInitial()

Description copied from interface: Algebraic

Get the initial function.

Specified by:

getInitial in interface Algebraic

Returns:

A function name of f_init. f_init should be an eval func. The return type of f_init.exec() has to be Tuple

getIntermed

public String getIntermed()

Description copied from interface: Algebraic

Get the intermediate function.

Specified by:

getIntermed in interface Algebraic

Returns:

A function name of f_intermed. f_intermed should be an eval func. The return type of f_intermed.exec() has to be Tuple

getFinal

public String getFinal()

Description copied from interface: Algebraic

Get the final function.

Specified by:

getFinal in interface Algebraic

Returns:

A function name of f_final. f_final should be an eval func parametrized by the same datum as the eval func implementing this interface.