On 07-07-2023 13:20, Laurenz Albe wrote:
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 would think it is dead code, I came to the same conclusion. So we can
drop SupportRequestIndexCondition, since the simplification happens to
take care of everything.
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)).
I will try to look into this. Originally that was what I was hoping for,
but didn't see way of going about it.
Thanks for your comments, I will also look at the locale-related
breakage you spotted.
Regards,
Kimjand
