| From: | Philip Warner <pjw(at)rhyme(dot)com(dot)au> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-hackers(at)postgreSQL(dot)org |
| Subject: | Re: Optimizer oddness, possibly compounded in 8.1 |
| Date: | 2005-12-03 06:10:22 |
| Message-ID: | 439136CE.70509@rhyme.com.au |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
Tom Lane wrote:
>It's something that's on the ever-growing TODO list ... I dunno if
>anyone has any near-term plans to work on it. It'd definitely be
>nice to teach the planner to do joins-over-unions well, and then
>make inheritance just invoke that behavior instead of being a crocky
>special case.
>
>
Sounds good; currently if you use the polymorphism of inherited tables,
and happen to cross 2 such tables, you get O(n^2) performance.
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