org.apache.pig.piggybank.evaluation.math
Class DoubleMax

java.lang.Object
  extended by org.apache.pig.EvalFunc<Double>
      extended by org.apache.pig.piggybank.evaluation.math.DoubleMax

public class DoubleMax
extends EvalFunc<Double>

math.max implements a binding to the Java function Math.max(int,int) for computing the the max value of the arguments. The returned value will be an int which is the maximum of the inputs.

Parameters:
value - 2 int values.
Return Value:
int max value of two input
Return Schema:
max_inputSchema
Example:
register math.jar;
A = load 'mydata' using PigStorage() as ( float1 );
B = foreach A generate float1, math.max(float1);

Author:
ajay garg
See Also:
Math#max(double),

Field Summary
 
Fields inherited from class org.apache.pig.EvalFunc
log, pigLogger, reporter, returnType
 
Constructor Summary
DoubleMax()
           
 
Method Summary
 Double exec(Tuple input)
          java level API
 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

DoubleMax

public DoubleMax()
Method Detail

exec

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

Specified by:
exec in class EvalFunc<Double>
Parameters:
input - expects a two numeric value
output - returns a single numeric value, which is the smaller of two inputs
Returns:
result, of type T.
Throws:
IOException

outputSchema

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


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