org.apache.pig.builtin
Class COUNT_STAR.Final

java.lang.Object
  extended by org.apache.pig.EvalFunc<Long>
      extended by org.apache.pig.builtin.COUNT_STAR.Final
Enclosing class:
COUNT_STAR

public static class COUNT_STAR.Final
extends EvalFunc<Long>


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
COUNT_STAR.Final()
           
 
Method Summary
 Long exec(Tuple input)
          This callback method must be implemented by all subclasses.
 
Methods inherited from class org.apache.pig.EvalFunc
finish, getArgToFuncMapping, getCacheFiles, getInputSchema, getLogger, getPigLogger, getReporter, getReturnType, getSchemaName, getSchemaType, isAsynchronous, outputSchema, 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

COUNT_STAR.Final

public COUNT_STAR.Final()
Method Detail

exec

public Long 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<Long>
Parameters:
input - the Tuple to be processed.
Returns:
result, of type T.
Throws:
IOException


Copyright © 2007-2012 The Apache Software Foundation