org.apache.pig.piggybank.evaluation.math
Class DoubleAbs
java.lang.Object
org.apache.pig.EvalFunc<Double>
org.apache.pig.piggybank.evaluation.math.DoubleAbs
public class DoubleAbs
- extends EvalFunc<Double>
math.ABS implements a binding to the Java function
Math.abs(double)
for computing the
absolute value of the argument. The returned value will be an double which is
absolute value of the input.
- Parameters:
value
- double
.
- Return Value:
double
absolute value of input
- Return Schema:
- abs_inputSchema
- Example:
register math.jar;
A = load 'mydata' using PigStorage() as ( float1 );
B = foreach A generate float1, math.ABS(float1);
- Author:
- ajay garg
- See Also:
Math.abs(double)
,
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 |
DoubleAbs
public DoubleAbs()
exec
public Double exec(Tuple input)
throws IOException
- java level API
- Specified by:
exec
in class EvalFunc<Double>
- Parameters:
input
- expects a single numeric valueoutput
- returns a single numeric value, absolute value of the argument
- Returns:
- result, of type T.
- 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.
- Overrides:
outputSchema
in class EvalFunc<Double>
- Parameters:
input
- Schema of the input
- Returns:
- Schema of the output
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