org.apache.datasketches.pig.cpc

Class UnionSketchAlgebraicFinal

java.lang.Object

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

org.apache.datasketches.pig.cpc.UnionSketchAlgebraicFinal

public class UnionSketchAlgebraicFinal
extends org.apache.pig.EvalFunc<org.apache.pig.data.DataByteArray>

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
UnionSketchAlgebraicFinal() Default constructor for the final pass of an Algebraic function.
UnionSketchAlgebraicFinal(String lgK) Constructor for the final pass of an Algebraic function.
UnionSketchAlgebraicFinal(String lgK, String seed) Constructor for the final pass of an Algebraic function.

Method Summary

Modifier and Type	Method and Description
org.apache.pig.data.DataByteArray	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

UnionSketchAlgebraicFinal

public UnionSketchAlgebraicFinal()

Default constructor for the final pass of an Algebraic function. Assumes default lgK and seed.

UnionSketchAlgebraicFinal

public UnionSketchAlgebraicFinal(String lgK)

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

Parameters:

lgK - in a form of a String

UnionSketchAlgebraicFinal

public UnionSketchAlgebraicFinal(String lgK,
                                 String seed)

Constructor for the final 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

seed - for the hash function

Method Detail

exec

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

Specified by:

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

Throws:

IOException