Package org.apache.datasketches.hive.tuple

Hive UDFs for Tuple sketches.

See: Description

Class Summary

Class	Description
ArrayOfDoublesSketchesTTestUDF
ArrayOfDoublesSketchToEstimateAndErrorBoundsUDF
ArrayOfDoublesSketchToEstimatesUDF
ArrayOfDoublesSketchToMeansUDF
ArrayOfDoublesSketchToNumberOfRetainedEntriesUDF
ArrayOfDoublesSketchToQuantilesSketchUDF
ArrayOfDoublesSketchToValuesUDTF
ArrayOfDoublesSketchToVariancesUDF
DataToArrayOfDoublesSketchUDAF
DataToArrayOfDoublesSketchUDAF.DataToArrayOfDoublesSketchEvaluator
DataToDoubleSummarySketchUDAF	This simple implementation is to give an example of a concrete UDAF based on the abstract DataToSketchUDAF if no extra arguments are needed.
DataToDoubleSummaryWithModeSketchUDAF	This is an example of a concrete UDAF based on the abstract DataToSketchUDAF if extra arguments are needed.
DataToSketchUDAF
DataToSketchUDAF.DataToSketchEvaluator<U,S extends org.apache.datasketches.tuple.UpdatableSummary<U>>
DoubleSummarySketchToEstimatesUDF
DoubleSummarySketchToPercentileUDF
UnionArrayOfDoublesSketchUDAF
UnionArrayOfDoublesSketchUDAF.UnionArrayOfDoublesSketchEvaluator
UnionDoubleSummarySketchUDAF	This simple implementation is to give an example of a concrete UDAF based on the abstract UnionSketchUDAF if no extra arguments are needed..
UnionDoubleSummarySketchUDAF.UnionDoubleSummarySketchEvaluator
UnionDoubleSummaryWithModeSketchUDAF	This is an example of a concrete UDAF based on the abstract UnionSketchUDAF if extra arguments are needed.
UnionDoubleSummaryWithModeSketchUDAF.UnionDoubleSummaryWithModeSketchEvaluator
UnionSketchUDAF	Generic implementation to be sub-classed with a particular type of Summary
UnionSketchUDAF.UnionSketchEvaluator<S extends org.apache.datasketches.tuple.Summary>

Package org.apache.datasketches.hive.tuple Description

Hive UDFs for Tuple sketches. Tuple sketches are based on the idea of Theta sketches with the addition of values associated with unique keys. Two sets of tuple sketch classes are available at the moment: generic Tuple sketches with user-defined Summary, and a faster specialized implementation with an array of double values.

There are two sets of Hive UDFs: one for generic Tuple sketch with an example implementation for DoubleSummay, and another one for a specialized ArrayOfDoublesSketch.

The generic implementation is in the form of abstract classes DataToSketchUDAF and UnionSketchUDAF to be specialized for particular types of Summary. An example implementation for DoubleSumamry is provided: DataToDoubleSummarySketchUDAF and UnionDoubleSummarySketchUDAF, as well as UDFs to obtain the results from sketches: DoubleSumamrySketchToEstimatesUDF and DoubleSummarySketchToPercentileUDF.

UDFs for ArrayOfDoublesSketch: DataToArrayOfDoublesSketchUDAF, UnionArrayOfDoublesSketchUDAF, ArrayOfDoublesSketchToEstimatesUDF, ArrayOfDoublesSketchToValuesUDTF.

Author:

Alexander Saydakov