public class RollupDimensions extends EvalFunc<DataBag>
{ (a, b, c), (a, b, null), (a, null, null), (null, null, null) }
EvalFunc.SchemaType
log, pigLogger, reporter, returnType
Constructor and Description |
---|
RollupDimensions() |
RollupDimensions(String allMarker) |
Modifier and Type | Method and Description |
---|---|
boolean |
allowCompileTimeCalculation()
Whether the UDF should be evaluated at compile time if all inputs are constant.
|
DataBag |
exec(Tuple tuple)
This callback method must be implemented by all subclasses.
|
Schema |
outputSchema(Schema input)
Report the schema of the output of this UDF.
|
finish, getArgToFuncMapping, getCacheFiles, getInputSchema, getLoadCaster, getLogger, getPigLogger, getReporter, getReturnType, getSchemaName, getSchemaType, getShipFiles, isAsynchronous, needEndOfAllInputProcessing, progress, setEndOfAllInput, setInputSchema, setPigLogger, setReporter, setUDFContextSignature, warn
public RollupDimensions()
public RollupDimensions(String allMarker)
public DataBag exec(Tuple tuple) throws IOException
EvalFunc
exec
in class EvalFunc<DataBag>
tuple
- the Tuple to be processed.IOException
public 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<DataBag>
input
- Schema of the inputpublic boolean allowCompileTimeCalculation()
EvalFunc
allowCompileTimeCalculation
in class EvalFunc<DataBag>
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