Re: [PERFORM] stable and immutable functions in GROUP BY clauses.

Hello, Stable and immutable functions do not improve performance when used within the GROUP BY clause. Here, the function will be called for each row. To avoid it, I can replace the funtion by its arguments within GROUP BY. Shame on me ! This is of course bullsh... It has nothing to

[PERFORM] stable and immutable functions in GROUP BY clauses.

Hello, Stable and immutable functions do not improve performance when used within the GROUP BY clause. Here, the function will be called for each row. To avoid it, I can replace the funtion by its arguments within GROUP BY. Maybe this hint is worth a note within the documentation on Function