| From: | Mischa <mischa(dot)Sandberg(at)telus(dot)net> |
|---|---|
| To: | Mischa <mischa(dot)Sandberg(at)telus(dot)net> |
| Cc: | "H(dot)J(dot) Sanders" <hjs(at)rmax(dot)nl>, pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: date - range |
| Date: | 2005-04-02 06:25:19 |
| Message-ID: | 1112423119.424e3acf49c9f@webmail.telus.net |
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| Lists: | pgsql-performance |
Quoting Mischa <mischa(dot)Sandberg(at)telus(dot)net>:
[deleted]
> SELECT People.* FROM People
> JOIN Widths
> ON People.start = today - today % Widths.width
> AND People.width = Widths.width
Yikes! I hit the SEND button one ohnosecend too fast.
(1) You still ALSO have to test:
... AND today between first_date and last_date
(2) On some SQL engines, it makes a different to how the engine can re-order the
nested loops, if you make the index (width,start) instead of (start,width).
Haven't tried on PG8 yet.
--
"Dreams come true, not free."
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