org.apache.pig.builtin
Class LongAbs

java.lang.Object
  extended by org.apache.pig.EvalFunc<Long>
      extended by org.apache.pig.builtin.LongAbs

public class LongAbs
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
LongAbs()
           
 
Method Summary
 Long exec(Tuple input)
          java level API
 Schema outputSchema(Schema input)
          Report the schema of the output of this UDF.
 
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
 

Constructor Detail

LongAbs

public LongAbs()
Method Detail

exec

public Long exec(Tuple input)
          throws IOException
java level API

Specified by:
exec in class EvalFunc<Long>
Parameters:
input - expects a single numeric value
Returns:
output returns a single numeric value, absolute value of the argument
Throws:
IOException

outputSchema

public Schema outputSchema(Schema input)
Description copied from class: EvalFunc
Report the schema of the output of this UDF. Pig will make use of this in error checking, optimization, and planning. The schema of input data to this UDF is provided.

The default implementation interprets the OutputSchema annotation, if one is present. Otherwise, it returns null (no known output schema).

Overrides:
outputSchema in class EvalFunc<Long>
Parameters:
input - Schema of the input
Returns:
Schema of the output


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