| From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
|---|---|
| To: | Tiago Antão <tra(at)fct(dot)unl(dot)pt> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Optimisation deficiency: currval('seq')-->seq scan, constant-->index scan |
| Date: | 2000-10-14 04:20:48 |
| Message-ID: | 200010140420.AAA22768@candle.pha.pa.us |
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| Lists: | pgsql-hackers |
> On Mon, 21 Aug 2000, Tom Lane wrote:
>
> > > One thing it might be interesting (please tell me if you think
> > > otherwise) would be to improve pg with better statistical information, by
> > > using, for example, histograms.
> >
> > Yes, that's been on the todo list for a while.
>
> If it's ok and nobody is working on that, I'll look on that subject.
> I'll start by looking at the analize portion of vacuum. I'm thinking in
> using arrays for the histogram (I've never used the array data type of
> postgres).
> Should I use 7.0.2 or the cvs version?
If you don't like the analyze part, you can blame me. It is
non-optimal, but lean.
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
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