:: Experimental :: A base class for user-defined aggregations, which can be used in Dataset operations to take all of the elements of a group and reduce them to a single value.
The input type for the aggregation.
The type of the intermediate value of the reduction.
The type of the final output result.
:: Experimental :: A Row representing a mutable aggregation buffer.
:: Experimental :: The base class for implementing user-defined aggregate functions (UDAF).
A user-defined function.
:: Experimental :: Utility functions for defining window in DataFrames.
:: Experimental :: A window specification that defines the partitioning, ordering, and frame boundaries.