Definition
Sliding windows multiply work
Pre-aggregating panes works only for associative aggregates, because partial results must be combinable.
- Window size
- size of the window
- Slide
- how often a new window starts
Worked examples, recomputed
Every number the mechanisms quote for this relationship is recomputed from it, so none of them disagrees with it.
Where it appears
Each mechanism states it in its own names. The general symbol each name stands for is shown with it.
- Streaming
What does it cost to remember, when the input never ends?