| From: | Bruce Momjian <maillist(at)candle(dot)pha(dot)pa(dot)us> |
|---|---|
| To: | Patrik Kudo <kudo(at)partitur(dot)se> |
| Cc: | pgsql-sql(at)postgreSQL(dot)org |
| Subject: | Re: [SQL] Good Optimization |
| Date: | 1999-07-08 15:40:18 |
| Message-ID: | 199907081540.LAA08894@candle.pha.pa.us |
| Views: | Whole Thread | Raw Message | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-sql |
[Charset iso-8859-1 unsupported, filtering to ASCII...]
> Bruce Momjian wrote:
> >
> > Added to TODO:
> >
> > * In WHERE x=3 AND x=y, add y=3
>
> I don't know if I'm way off, but wouldn't removing "x=y" improve
> performance further?
Let me rewrite it. TODO list updated:
* In WHERE tab1.x=3 AND tab1.x=tab2.y, add tab2.y=3
--
Bruce Momjian | http://www.op.net/~candle
maillist(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
+ Christ can be your backup. | Drexel Hill, Pennsylvania 19026
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Bruce Momjian | 1999-07-08 15:48:04 | Re: [SQL] Good Optimization |
| Previous Message | Tom Lane | 1999-07-08 15:01:17 | Re: [SQL] Good Optimization |