Re: function runs slow
| От | Mladen Gogala |
|---|---|
| Тема | Re: function runs slow |
| Дата | |
| Msg-id | 4C3FA749.5010803@vmsinfo.com обсуждение исходный текст |
| Ответ на | Re: function runs slow ("A. Kretschmer" <andreas.kretschmer@schollglas.com>) |
| Список | pgsql-novice |
A. Kretschmer wrote: > In response to Charles Holleran : > >> Why is it slow when the same un-functionized query was fast? The tbl_a has >> est. 30,000,000 records. It has an index for (x,y) pairs. It has an index for >> date_observed. So good results on the straight query. Where did I go wrong >> with the function? >> > > The planner isn't able to choose the right plan because he don't know > the actual parameters. > That is precisely why I asked about the values for the bind variables. Unfortunately, there is no facility that could influence the plan in this case. Constant re-parsing will, of course, be grossly suboptimal. -- Mladen Gogala Sr. Oracle DBA 1500 Broadway New York, NY 10036 (212) 329-5251 www.vmsinfo.com
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