3 ms·
So I contradicted myself above. Aggregation is probably not monotonic -- the output of the aggregation is not a subset if the input is a subset.
by mehulashah 2y ago
So I contradicted myself above. Aggregation is probably not monotonic -- the output of the aggregation is not a subset if the input is a subset.
- slt2021 2y agoit is possible to split aggregation into parts that use commutative operators. for example global AVG can be expressed as SUM()/COUNT() although AVG is not commutative, SUM() and COUNT() are commutative and can be run in scatter/gather mode and offloaded to individual nodes