| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | nickf(at)ontko(dot)com |
| Cc: | "pgsql-admin" <pgsql-admin(at)postgresql(dot)org> |
| Subject: | Re: A *short* planner question |
| Date: | 2002-04-13 16:28:22 |
| Message-ID: | 16054.1018715302@sss.pgh.pa.us |
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| Lists: | pgsql-admin pgsql-general |
"Nick Fankhauser" <nickf(at)ontko(dot)com> writes:
> ... In addition, since we're using a "like", typing
> in only an initial char would get roughly 1/26 of the rows back- Does the
> planner look at the number of leading chars provided when coming up with a
> plan?
Yeah it does, if it can see a constant pattern for the LIKE or regex match.
regards, tom lane
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