| Class | Description |
|---|---|
| Aggregator<I,B,O> |
A base class for user-defined aggregations, which can be used in
DataFrame and Dataset
operations to take all of the elements of a group and reduce them to a single value. |
| MutableAggregationBuffer |
:: Experimental ::
A
Row representing an mutable aggregation buffer. |
| UserDefinedAggregateFunction |
:: Experimental ::
The base class for implementing user-defined aggregate functions (UDAF).
|
| Window |
:: Experimental ::
Utility functions for defining window in DataFrames.
|
| WindowSpec |
:: Experimental ::
A window specification that defines the partitioning, ordering, and frame boundaries.
|