org.apache.datasketches.hive.tuple

Class ArrayOfDoublesSketchToQuantilesSketchUDF

java.lang.Object

org.apache.hadoop.hive.ql.exec.UDF

org.apache.datasketches.hive.tuple.ArrayOfDoublesSketchToQuantilesSketchUDF

public class ArrayOfDoublesSketchToQuantilesSketchUDF
extends org.apache.hadoop.hive.ql.exec.UDF

Constructor Summary

Constructors

Constructor and Description
ArrayOfDoublesSketchToQuantilesSketchUDF()

Method Summary

Modifier and Type	Method and Description
org.apache.hadoop.io.BytesWritable	evaluate(org.apache.hadoop.io.BytesWritable serializedSketch) Convert the first column from a given ArrayOfDoublesSketch to a quantiles DoublesSketch using the default parameter k.
org.apache.hadoop.io.BytesWritable	evaluate(org.apache.hadoop.io.BytesWritable serializedSketch, int column) Convert a given column from a given ArrayOfDoublesSketch to a quantiles DoublesSketch using the default parameter k.
org.apache.hadoop.io.BytesWritable	evaluate(org.apache.hadoop.io.BytesWritable serializedSketch, int column, int k) Convert a given column from a given ArrayOfDoublesSketch to a quantiles DoublesSketch

Methods inherited from class org.apache.hadoop.hive.ql.exec.UDF

getRequiredFiles, getRequiredJars, getResolver, setResolver

Methods inherited from class java.lang.Object

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

Constructor Detail

ArrayOfDoublesSketchToQuantilesSketchUDF

public ArrayOfDoublesSketchToQuantilesSketchUDF()

Method Detail

evaluate

public org.apache.hadoop.io.BytesWritable evaluate(org.apache.hadoop.io.BytesWritable serializedSketch)

Convert the first column from a given ArrayOfDoublesSketch to a quantiles DoublesSketch using the default parameter k.

Parameters:

serializedSketch - ArrayOfDoublesSketch in as serialized binary

Returns:

serialized DoublesSketch

evaluate

public org.apache.hadoop.io.BytesWritable evaluate(org.apache.hadoop.io.BytesWritable serializedSketch,
                                                   int column)

Convert a given column from a given ArrayOfDoublesSketch to a quantiles DoublesSketch using the default parameter k.

Parameters:

serializedSketch - ArrayOfDoublesSketch in as serialized binary

column - 1-based column number

Returns:

serialized DoublesSketch

evaluate

public org.apache.hadoop.io.BytesWritable evaluate(org.apache.hadoop.io.BytesWritable serializedSketch,
                                                   int column,
                                                   int k)

Convert a given column from a given ArrayOfDoublesSketch to a quantiles DoublesSketch

Parameters:

serializedSketch - ArrayOfDoublesSketch in as serialized binary

column - 1-based column number

k - parameter that determines the accuracy and size of the quantiles sketch

Returns:

serialized DoublesSketch