| From: | Michael Glaesemann <grzm(at)seespotcode(dot)net> |
|---|---|
| To: | "sharath kumar" <k(dot)sharat(at)gmail(dot)com> |
| Cc: | pgsql-hackers(at)postgresql(dot)org, pgsql-general <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: [HACKERS] functions to obtain query plan |
| Date: | 2007-04-21 12:49:16 |
| Message-ID: | F81EBB9B-67EF-48CD-B2F9-C99E208ACBA9@seespotcode.net |
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| Lists: | pgsql-general pgsql-hackers |
On Apr 21, 2007, at 4:46 , sharath kumar wrote:
> For a particular query, are there any functions which can give me
> the start-up cost, total run-cost, number of rows and width?
-hackers is a list for discussion of development of PostgreSQL
itself. Your question would probably be more appropriate in -general
(which I am cc'ing) or perhaps -performance.
I believe EXPLAIN ANALYZE will provide what you're looking for. The
PostgreSQL documentation is a good place to get started:
http://www.postgresql.org/docs/8.2/interactive/sql-explain.html
http://www.postgresql.org/docs/8.2/interactive/performance-tips.html
Hope this helps.
Michael Glaesemann
grzm seespotcode net
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