# Package org.apache.datasketches.hive.frequencies

Hive UDFs for Frequent Items sketch. This includes generic implementation in the form of abstract classes DataToItemsSketchUDAF and UnionItemsSketchUDAF to be specialized for particular types of items. An implementation for strings is provided: DataToStringsSketchUDAF and UnionStringsSketchUDAF. GetFrequentItemsFromStringsSketchUDTF is to obtain results from sketches.

Author:
  Alexander Saydakov

Class Summary
DataToItemsSketchUDAF<T>: This is a generic implementation to be specialized in subclasses
DataToItemsSketchUDAF.DataToItemsSketchEvaluator<T>
DataToStringsSketchUDAF
GetFrequentItemsFromStringsSketchUDTF
UnionItemsSketchUDAF<T>: This is a generic implementation to be specialized in subclasses
UnionItemsSketchUDAF.UnionItemsSketchEvaluator<T>
UnionStringsSketchUDAF