From: Miroslav Šulc <miroslav.sulc@startnet.cz>
To: pgsql-sql@postgresql.org
Subject: Most efficient way to hard-sort records
Date: Sat, 06 May 2006 10:13:08 +0200
Message-ID: <445C5A94.4020907@startnet.cz> (raw)
Hello,
I have a table with cca 100,000 records. I need to hard-sort the records
by a key from second table. By hard-sorting I mean storing position of
each row in the main table. Here is what my tables look like:
main_table: id, name, position
key_table: id, main_table_id, key, value
Here is how I need to sort the records:
SELECT * FROM main_table
INNER JOIN key_table ON main_table.id = key_table.main_table_id
WHERE key = 'param'
ORDER BY value
I currently collect all ids from main_table in sorted order and then
update the position field for each row in the main_table one-by-one. Is
there a better/faster/more efficient solution?
Thank you for your suggestions.
--
Miroslav Šulc
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Subject: Re: Most efficient way to hard-sort records
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