expressions

Type Members

1. abstract class Aggregator[-IN, BUF, OUT] extends Serializable

   :: 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.

2. abstract class MutableAggregationBuffer extends Row

   A Row representing a mutable aggregation buffer.

3. abstract class UserDefinedAggregateFunction extends Serializable

   The base class for implementing user-defined aggregate functions (UDAF).

4. case class UserDefinedFunction(f: AnyRef, dataType: DataType, inputTypes: Option[Seq[DataType]]) extends Product with Serializable

   A user-defined function.

5. class Window extends AnyRef

   Utility functions for defining window in DataFrames.

6. class WindowSpec extends AnyRef

   A window specification that defines the partitioning, ordering, and frame boundaries.