| From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
|---|---|
| To: | "mascarm(at)mascari(dot)com" <mascarm(at)mascari(dot)com> |
| Cc: | "'mlw'" <markw(at)mohawksoft(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Re: 7.2 items |
| Date: | 2001-06-07 20:05:19 |
| Message-ID: | 200106072005.f57K5Jx00380@candle.pha.pa.us |
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| Lists: | pgsql-hackers |
> And in addition,
>
> If you submitted the query:
>
> SELECT * FROM addresses WHERE state = 'OH'
> AND areacode = '614'
>
> Then, with bitmap indexes, the bitmaps are just logically ANDed
> together, and the final bitmap determines the matching rows.
Message added to TODO.detail. The use of AND seems like a very nice
optimization possible with bitmap indexes. Thanks.
--
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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