public class SCALB extends EvalFunc<Double>
Math.scalb(double,int).
Given a tuple with two data atom x and y ,it Return x pow(2,y)
rounded as if performed by a single correctly rounded
floating-point multiply to a member of the double value set.
value - Tuple containing two numeric values [Double, Integer].Double
register math.jar;
A = load 'mydata' using PigStorage() as ( float1 );
B = foreach A generate float1, math.SCALB(float1);
Math.scalb(double,int),
EvalFunc.SchemaTypelog, pigLogger, reporter, returnType| Constructor and Description |
|---|
SCALB() |
| 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.
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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
fistArgument pow(2,secondArgument) rounded as if performed by a
single correctly rounded floating-point multiply to a member of
the double value set.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