org.apache.datasketches.pig.hll

Class SketchToString

java.lang.Object

org.apache.pig.EvalFunc<String>

org.apache.datasketches.pig.hll.SketchToString

public class SketchToString
extends org.apache.pig.EvalFunc<String>

This is a User Defined Function (UDF) for "pretty printing" the summary of an HllSketch

Author:

Alexander Saydakov

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
SketchToString() Prints only the sketch summary.
SketchToString(String hllDetail, String auxDetail) Prints the summary and details based on given input parameters.

Method Summary

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

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

SketchToString

public SketchToString()

Prints only the sketch summary.

SketchToString

public SketchToString(String hllDetail,
                      String auxDetail)

Prints the summary and details based on given input parameters.

Parameters:

hllDetail - flag to print the HLL sketch detail

auxDetail - flag to print the auxiliary detail

Method Detail

exec

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

Specified by:

exec in class org.apache.pig.EvalFunc<String>

Throws:

IOException