org.apache.pig.impl.builtin
Class GFAny

java.lang.Object
  org.apache.pig.EvalFunc<Integer>
      org.apache.pig.impl.builtin.GFAny

public class GFAny
extends EvalFunc<Integer>

built-in grouping function; permits system to choose any grouping.

Field Summary

static int

defaultNumGroups

Fields inherited from class org.apache.pig.EvalFunc

log, pigLogger, reporter, returnType

Constructor Summary

GFAny()

GFAny(int numGroups)

Method Summary

Integer

exec(Tuple input) This callback method must be implemented by all subclasses.

Methods inherited from class org.apache.pig.EvalFunc

finish, getArgToFuncMapping, getCacheFiles, getLogger, getPigLogger, getReporter, getReturnType, getSchemaName, isAsynchronous, outputSchema, progress, setPigLogger, setReporter, warn

Methods inherited from class java.lang.Object

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

Field Detail

defaultNumGroups

public static final int defaultNumGroups

See Also:

Constant Field Values

Constructor Detail

GFAny

public GFAny()

GFAny

public GFAny(int numGroups)

Method Detail

exec

public Integer exec(Tuple input)
             throws IOException

Description copied from class: EvalFunc

This callback method must be implemented by all subclasses. This is the method that will be invoked on every Tuple of a given dataset. Since the dataset may be divided up in a variety of ways the programmer should not make assumptions about state that is maintained between invocations of this method.

Specified by:

exec in class EvalFunc<Integer>

Parameters:

input - the Tuple to be processed.

Returns:

result, of type T.

Throws:

IOException