Module datafusion_expr::window_state

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Expand description

Structures used to hold window function state (for implementing WindowUDFs)

Structs

  • PartitionBatchState
    State for each unique partition determined according to PARTITION BY column(s)
  • WindowAggState
    Holds the state of evaluating a window function
  • WindowFrameStateGroups
    This structure encapsulates all the state information we require as we scan groups of data while processing window frames.
  • WindowFrameStateRange
    This structure encapsulates all the state information we require as we scan ranges of data while processing RANGE frames. Attribute sort_options stores the column ordering specified by the ORDER BY clause. This information is used to calculate the range.

Enums

  • WindowFrameContext
    This object stores the window frame state for use in incremental calculations.