org.apache.pig.piggybank.evaluation.string
Class LASTINDEXOF

java.lang.Object
  extended by org.apache.pig.EvalFunc<Integer>
      extended by org.apache.pig.piggybank.evaluation.string.LASTINDEXOF

public class LASTINDEXOF
extends EvalFunc<Integer>

string.INSTR implements eval function to search for the last occurrence of a string
Returns null on error
Example: register pigudfs.jar; A = load 'mydata' as (name); B = foreach A generate string.LASTINDEXOF(name, ","); dump B;


Field Summary
 
Fields inherited from class org.apache.pig.EvalFunc
pigLogger, reporter, returnType
 
Constructor Summary
LASTINDEXOF()
           
 
Method Summary
 Integer exec(Tuple input)
          Finds the last location of a substring in a given string.
 Schema outputSchema(Schema input)
           
 
Methods inherited from class org.apache.pig.EvalFunc
finish, getArgToFuncMapping, 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

LASTINDEXOF

public LASTINDEXOF()
Method Detail

exec

public Integer exec(Tuple input)
             throws IOException
Finds the last location of a substring in a given string.

Specified by:
exec in class EvalFunc<Integer>
Parameters:
input - tuple:
  1. the string to process
  2. the substring to find
Returns:
last location of substring, or null in case of processing errors.
Throws:
IOException

outputSchema

public Schema outputSchema(Schema input)
Overrides:
outputSchema in class EvalFunc<Integer>
Parameters:
input - Schema of the input
Returns:
Schema of the output


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