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