datafu.pig.bags

Class CountDistinctUpTo.Final

java.lang.Object

org.apache.pig.EvalFunc<java.lang.Integer>

datafu.pig.bags.CountDistinctUpTo.Final

Enclosing class:

CountDistinctUpTo

public static class CountDistinctUpTo.Final
extends org.apache.pig.EvalFunc<java.lang.Integer>

Receives output either from initial results or intermediate Outputs an integer with the number of distinct tuples, up to the maximum desired.

 
 {({T}),({T,T,T})} -> (3)

 or

 {({T}),({T,T,T}),(null)} -> (MAX)
 
 

Nested Class Summary

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

org.apache.pig.EvalFunc.SchemaType

Field Summary

Fields inherited from class org.apache.pig.EvalFunc

log, pigLogger, reporter, returnType

Constructor Summary

Constructors

Constructor and Description
Final()
Final(java.lang.String maxAmount)

Method Summary

Modifier and Type	Method and Description
java.lang.Integer	exec(org.apache.pig.data.Tuple input)

Methods inherited from class org.apache.pig.EvalFunc

allowCompileTimeCalculation, finish, getArgToFuncMapping, getCacheFiles, getInputSchema, getLogger, getPigLogger, getReporter, getReturnType, getSchemaName, getSchemaType, getShipFiles, 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

Final

public Final()

Final

public Final(java.lang.String maxAmount)

Method Detail

exec

public java.lang.Integer exec(org.apache.pig.data.Tuple input)
                       throws java.io.IOException

Specified by:

exec in class org.apache.pig.EvalFunc<java.lang.Integer>

Throws:

java.io.IOException