Re: Change in CTE treatment in query plans?

Tom Lane <[email protected]> Thu, 17 Oct 2019 11:04:32 +0200
Newsgroups gmane.comp.db.postgresql.performance
Message-ID <[email protected]>
David Conlin <[email protected]> writes:
> Does anyone know if there's been a change in the way values for CTEs are 
> displayed in query plans?

Offhand I don't recall any such changes, nor does a cursory look
through explain.c find anything promising.

If you're concerned with a multiply-referenced CTE, one possibility
for funny results is that the blame for its execution cost could be
spread across the multiple call sites.  The same can happen with
initplans/subplans.  But I'm just guessing; you didn't show any
concrete examples so it's hard to be definite.

			regards, tom lane