Re: another "EXPLAIN -- NO INDEX?" question
| От | will trillich |
|---|---|
| Тема | Re: another "EXPLAIN -- NO INDEX?" question |
| Дата | |
| Msg-id | 20020210114552.B23651@serensoft.com обсуждение исходный текст |
| Ответ на | Re: another "EXPLAIN -- NO INDEX?" question (Tom Lane <tgl@sss.pgh.pa.us>) |
| Ответы |
Re: another "EXPLAIN -- NO INDEX?" question
|
| Список | pgsql-general |
On Sun, Feb 10, 2002 at 11:29:57AM -0500, Tom Lane wrote:
> Try 7.2, and don't forget to VACUUM ANALYZE after you've loaded the
> data.
i'm stuck with 7.1 for now, and i do the vacuum analyze
nightly... any other ideas?
---------
create index hits_by_server on hits(server);
hits=# explain
hits-# select * from hits where (server = 1 or server = 3);
NOTICE: QUERY PLAN:
Seq Scan on hits (cost=0.00..8537.01 rows=20205 width=90)
EXPLAIN
hits=# select count(*) from hits;
count
--------
266611
(1 row)
hits=# select count(*) from hits where (server=1 or server=3);
count
-------
3678
(1 row)
--
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will@serensoft.com
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