| From: | Stephen Frost <sfrost(at)snowman(dot)net> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Slow tab completion w/ lots of tables |
| Date: | 2012-08-21 17:36:10 |
| Message-ID: | 20120821173610.GK1267@tamriel.snowman.net |
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* Tom Lane (tgl(at)sss(dot)pgh(dot)pa(dot)us) wrote:
> Um ... I don't see any difference in the clause ordering from 8.2
> forward. "SELECT * FROM baz<TAB>" produces a query like this in 8.2:
Odd.. I could have sworn I saw a difference in the query generated,
but perhaps I just assumed it was reordered, since it ends up ordered
differently in the actual plans:
8.2: http://explain.depesz.com/s/449
9.1: http://explain.depesz.com/s/03O
Increasing the cost of pg_table_is_visible() caused it to move that test
to the end again (under 9.1), which improved the performance (though I'm
sure having a usable index would help a great deal more..).
Thanks,
Stephen
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