2013/2/11 Tom Lane <t...@sss.pgh.pa.us>: > Pavel Stehule <pavel.steh...@gmail.com> writes: >>> no, there is strange estimation >>> >>> SubPlan 2 >>> -> CTE Scan on pl pl_1 (cost=0.00..468.59 >>> rows=89000 width=4) (actual time=0.023..8.379 rows=566 loops=1000) >>> Output: foo(pl_1.a) > > Nothing strange about it. 89 rows out from the underlying CTE (which > appears to be dead accurate) times 1000 for the SRF's expansion. > >> respective why estimation is unstrable > > It isn't --- you are looking at two different subplans there, one with > a SRF in it and one without.
ok, I understand now Thank you Regards Pavel > > regards, tom lane -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
