org.apache.datasketches.pig.hll

Class DataToSketchAlgebraicIntermediate

java.lang.Object

org.apache.pig.EvalFunc<org.apache.pig.data.Tuple>

org.apache.datasketches.pig.hll.DataToSketchAlgebraicIntermediate

public class DataToSketchAlgebraicIntermediate
extends org.apache.pig.EvalFunc<org.apache.pig.data.Tuple>

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.pig.EvalFunc

org.apache.pig.EvalFunc.SchemaType

Field Summary

Fields inherited from class org.apache.pig.EvalFunc

log, pigLogger, reporter, returnType

Constructor Summary

Constructors

Constructor and Description
DataToSketchAlgebraicIntermediate() Default constructor for the intermediate pass of an Algebraic function.
DataToSketchAlgebraicIntermediate(String lgK) Constructor for the intermediate pass of an Algebraic function.
DataToSketchAlgebraicIntermediate(String lgK, String tgtHllType) Constructor for the intermediate pass of an Algebraic function.

Method Summary

Modifier and Type	Method and Description
org.apache.pig.data.Tuple	exec(org.apache.pig.data.Tuple inputTuple)

Methods inherited from class org.apache.pig.EvalFunc

allowCompileTimeCalculation, finish, getArgToFuncMapping, getCacheFiles, getInputSchema, getLoadCaster, getLogger, getPigLogger, getReporter, getReturnType, getSchemaName, getSchemaType, getShipFiles, isAsynchronous, needEndOfAllInputProcessing, outputSchema, progress, setEndOfAllInput, setInputSchema, setPigLogger, setReporter, setUDFContextSignature, warn

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DataToSketchAlgebraicIntermediate

public DataToSketchAlgebraicIntermediate()

Default constructor for the intermediate pass of an Algebraic function. Assumes default lgK and target HLL type.

DataToSketchAlgebraicIntermediate

public DataToSketchAlgebraicIntermediate(String lgK)

Constructor for the intermediate pass of an Algebraic function. Pig will call this and pass the same constructor arguments as the base UDF. Assumes default HLL target type.

Parameters:

lgK - in a form of a String

DataToSketchAlgebraicIntermediate

public DataToSketchAlgebraicIntermediate(String lgK,
                                         String tgtHllType)

Constructor for the intermediate pass of an Algebraic function. Pig will call this and pass the same constructor arguments as the base UDF.

Parameters:

lgK - parameter controlling the sketch size and accuracy

tgtHllType - HLL type of the resulting sketch

Method Detail

exec

public org.apache.pig.data.Tuple exec(org.apache.pig.data.Tuple inputTuple)
                               throws IOException

Specified by:

exec in class org.apache.pig.EvalFunc<org.apache.pig.data.Tuple>

Throws:

IOException