Re: Reduce "Var IS [NOT] NULL" quals during constant folding

On Fri, Mar 21, 2025 at 10:21 AM Richard Guo <guofenglinux@gmail.com> wrote:
> Not quite sure if this is something we need to worry about.

I haven't really dug into this but I bet it's not that serious, in the
sense that we could probably work around it with more logic if we
really need to.

However, I'm a bit concerned about the overall premise of the patch
set. It feels like it is moving something that really ought to happen
at optimization time back to parse time. I have a feeling that's going
to break something, although I am not sure right now exactly what.
Wouldn't it be better to have this still happen in the planner, but
sooner than it does now?

--
Robert Haas
EDB: http://www.enterprisedb.com