public class copySign extends EvalFunc<Double>
Math.copySign(double,double).
Given a tuple with two data atom Returns the first floating-point argument
with the sign of the second floating-point argument.
value - Tuple containing two double.double
register math.jar;
A = load 'mydata' using PigStorage() as ( float1 );
B = foreach A generate float1, math.copySign(float1);
Math.copySign(double,double),
EvalFunc.SchemaTypelog, pigLogger, reporter, returnType| Constructor and Description |
|---|
copySign() |
| Modifier and Type | Method and Description |
|---|---|
Double |
exec(Tuple input)
java level API
|
List<FuncSpec> |
getArgToFuncMapping()
Allow a UDF to specify type specific implementations of itself.
|
Schema |
outputSchema(Schema input)
Report the schema of the output of this UDF.
|
allowCompileTimeCalculation, finish, getCacheFiles, getInputSchema, getLoadCaster, getLogger, getPigLogger, getReporter, getReturnType, getSchemaName, getSchemaType, getShipFiles, isAsynchronous, needEndOfAllInputProcessing, progress, setEndOfAllInput, setInputSchema, setPigLogger, setReporter, setUDFContextSignature, warnpublic Double exec(Tuple input) throws IOException
exec in class EvalFunc<Double>input - expects a tuple containing two numeric DataAtom valueoutput - returns a single numeric DataAtom value, which is
first floating-point argument with the sign of the second
floating-point argument.IOExceptionpublic Schema outputSchema(Schema input)
EvalFunc
The default implementation interprets the OutputSchema annotation,
if one is present. Otherwise, it returns null (no known output schema).
outputSchema in class EvalFunc<Double>input - Schema of the inputpublic List<FuncSpec> getArgToFuncMapping() throws FrontendException
EvalFuncgetArgToFuncMapping in class EvalFunc<Double>FrontendExceptionCopyright © 2007-2017 The Apache Software Foundation