| From: | "Jeff Amiel" <JAmiel(at)istreamimaging(dot)com> |
|---|---|
| To: | "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us>, "Scott Marlowe" <scott(dot)marlowe(at)gmail(dot)com> |
| Cc: | pgsql-general(at)postgresql(dot)org |
| Subject: | Re: The planner hates me. |
| Date: | 2008-09-25 22:18:42 |
| Message-ID: | C17A452040EDB84AA7A10AEA334E3E1455D1CF@AD1 |
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| Thread: | |
| Lists: | pgsql-general |
-----Original Message-----
From: Tom Lane [mailto:tgl(at)sss(dot)pgh(dot)pa(dot)us]
The Right Way (tm) to do this would be something like
create temp table dates as select * from get_dates(...);
analyze dates;
... original select, but join against temp table ...
which would leave the planner armed with some stats about the range
of dates of interest.
------------
I actually tried that but minus the analyze..... :(
Btw, congrats on whomever contributed to the bitmap scans (v8.1 I
believe)....the ability to use multiple indexes for a single table in
the same query is fantastic!!
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