I wrote: > You implement both "SupportRequestIndexCondition" and > "SupportRequestSimplify", > but when I experimented, the former was never called. That does not > surprise me, since any expression of the shape "expr <@ range constant" > can be simplified. Is the "SupportRequestIndexCondition" branch dead code? > If not, do you have an example that triggers it?
I had an idea about this: So far, you only consider constant ranges. But if we have a STABLE range expression, you could use an index scan for "expr <@ range", for example Index Cond (expr >= lower(range) AND expr < upper(range)). Yours, Laurenz Albe
