org.apache.datasketches.hive.quantiles

Class GetQuantilesFromDoublesSketchUDF

java.lang.Object

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

org.apache.datasketches.hive.quantiles.GetQuantilesFromDoublesSketchUDF

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

Constructor Summary

Constructors

Constructor and Description
GetQuantilesFromDoublesSketchUDF()

Method Summary

Modifier and Type	Method and Description
List<Double>	evaluate(org.apache.hadoop.io.BytesWritable serializedSketch, Boolean inclusive, Double... fractions) Returns a list of quantile values from a given sketch
List<Double>	evaluate(org.apache.hadoop.io.BytesWritable serializedSketch, Boolean inclusive, int number) Returns a list of quantile values from a given sketch
List<Double>	evaluate(org.apache.hadoop.io.BytesWritable serializedSketch, Double... fractions) Returns a list of quantile values from a given sketch.
List<Double>	evaluate(org.apache.hadoop.io.BytesWritable serializedSketch, int number) Returns a list of quantile values from a given sketch.

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

GetQuantilesFromDoublesSketchUDF

public GetQuantilesFromDoublesSketchUDF()

Method Detail

evaluate

public List<Double> evaluate(org.apache.hadoop.io.BytesWritable serializedSketch,
                             Double... fractions)

Returns a list of quantile values from a given sketch. Equivalent to calling GetQuantiles(sketch, true, fractions...)

Parameters:

serializedSketch - serialized sketch

fractions - list of values from 0 to 1 inclusive

Returns:

list of quantile values

evaluate

public List<Double> evaluate(org.apache.hadoop.io.BytesWritable serializedSketch,
                             Boolean inclusive,
                             Double... fractions)

Returns a list of quantile values from a given sketch

Parameters:

serializedSketch - serialized sketch

inclusive - if true, the given ranks are considered inclusive (include weight of an item)

fractions - list of values from 0 to 1 inclusive

Returns:

list of quantile values

evaluate

public List<Double> evaluate(org.apache.hadoop.io.BytesWritable serializedSketch,
                             int number)

Returns a list of quantile values from a given sketch. Equivalent to calling GetQuantiles(sketch, true, number)

Parameters:

serializedSketch - serialized sketch

number - of evenly spaced fractions

Returns:

list of quantile values

evaluate

public List<Double> evaluate(org.apache.hadoop.io.BytesWritable serializedSketch,
                             Boolean inclusive,
                             int number)

Returns a list of quantile values from a given sketch

Parameters:

serializedSketch - serialized sketch

inclusive - if true, the given ranks are considered inclusive (include weight of an item)

number - of evenly spaced fractions

Returns:

list of quantile values