Re: EXPLAIN and nfiltered, take two
От | Marti Raudsepp |
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Тема | Re: EXPLAIN and nfiltered, take two |
Дата | |
Msg-id | CABRT9RC5UOZLphAF=fM4w5CrGq0QfNrskz4-HmhX4=WpmFT0Jw@mail.gmail.com обсуждение исходный текст |
Ответ на | EXPLAIN and nfiltered, take two (Marko Tiikkaja <marko.tiikkaja@2ndquadrant.com>) |
Ответы |
Re: EXPLAIN and nfiltered, take two
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Список | pgsql-hackers |
Hi! On Thu, Sep 8, 2011 at 15:11, Marko Tiikkaja <marko.tiikkaja@2ndquadrant.com> wrote: > Here's a patch for $SUBJECT based on the feedback here: > http://archives.postgresql.org/message-id/9053.1295888538@sss.pgh.pa.us I tried this patch and noticed something weird. This is probably not intentional: explain analyze select * from generate_series(1,10) i where i>1 and now()!=now(); Result (cost=0.01..12.51 rows=333 width=4) (actual time=0.010..0.010 rows=0 loops=1) One-Time Filter: (now() <> now()) -> Function Scan on generate_series i (cost=0.01..12.51 rows=333 width=4) (never executed) Filter: (i > 1) Rows Removed by Filter: -nan Since it's never executed, nfiltered shows up as "-nan" Regards, Marti
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