On 2017-06-04 14:16:14 -0700, Mark Dilger wrote: > Sorry, I was not clear. What I meant to get at was that if you remove from > the > executor all support for SRFs inside case statements, you might foreclose the > option > of extending the syntax at some later date to allow aggregates over > SRFs.
Seems very unlikely that we'd ever want to do that. The right way to do this is to simply move the SRF into the from list. Having the executor support arbitrary sources of tuples would just complicate and slow down already complicated and slow code... > I'm > not saying that this works currently, but in principle if you allowed that > SUM() that > I put up there, you'd get back exactly one row from it, same as you get from > the > ELSE clause. That would seem to solve the problem without going so far as > completely disallowing the SRF altogether. But what would the benefit be? Greetings, Andres Freund -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
