Re: Removing unneeded self joins

On Thu, Feb 22, 2024 at 10:51 AM Andrei Lepikhov
<a.lepikhov@postgrespro.ru> wrote:
> On 21/2/2024 14:26, Richard Guo wrote:
> > I think the right fix for these issues is to introduce a new element
> > 'sublevels_up' in ReplaceVarnoContext, and enhance replace_varno_walker
> > to 1) recurse into subselects with sublevels_up increased, and 2)
> > perform the replacement only when varlevelsup is equal to sublevels_up.
> This code looks good. No idea how we have lost it before.

Thanks to Richard for the patch and to Andrei for review.  I also find
code looking good.  Pushed with minor edits from me.

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Regards,
Alexander Korotkov