| From: | Richard Huxton <dev(at)archonet(dot)com> |
|---|---|
| To: | Mihail Nasedkin <m(dot)nasedkin(dot)perm(at)mail(dot)ru> |
| Cc: | pgsql-sql(at)postgresql(dot)org |
| Subject: | Re: index scan |
| Date: | 2005-03-21 09:15:40 |
| Message-ID: | 423E90BC.80501@archonet.com |
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| Lists: | pgsql-sql |
Mihail Nasedkin wrote:
> xxxx=# explain select * from sites s join site_screens ss on s.oid = ss.id_site; QUERY PLAN ---------------------------------------------------------------------------
> Hash Join (cost=...)
> Hash Cond: ("outer".id_site = "inner".oid)
> -> Seq Scan on site_screens ss (cost=...)
> -> Hash (cost=...)
> -> Seq Scan on sites s (cost=...)
You've commented out the interesting bits (the costs/rows)
> I want to Index Scan. What must I do?
Why do you want an index scan? Do you have any evidence it will be
faster than a sequential scan?
--
Richard Huxton
Archonet Ltd
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