Module datafusion_expr::window_frame
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Window frame module
The frame-spec determines which output rows are read by an aggregate window function. The frame-spec consists of four parts:
- A frame type - either ROWS, RANGE or GROUPS,
- A starting frame boundary,
- An ending frame boundary,
- An EXCLUDE clause.
Structs
The frame-spec determines which output rows are read by an aggregate window function.
Enums
There are five ways to describe starting and ending frame boundaries:
There are three frame types: ROWS, GROUPS, and RANGE. The frame type determines how the starting and ending boundaries of the frame are measured.