Re: speed w/ OFFSET/LIMIT
От | Damien |
---|---|
Тема | Re: speed w/ OFFSET/LIMIT |
Дата | |
Msg-id | 200305271627.11964.dm_mailings@abelia-decors.com обсуждение исходный текст |
Ответ на | speed w/ OFFSET/LIMIT (Damien <dm_mailings@abelia-decors.com>) |
Список | pgsql-general |
I found a kind of workaround by : - first creating a view : CREATE VIEW table_view AS SELECT * FROM table ORDER BY main_field OFFSET x LIMIT 50 - then joining required tables SELECT t.* , t1.flag1_details , ... , tn.flagn_details FROM table_view t JOINs.... A better solution anyway ? On Tuesday 27 May 2003 15:45, Damien wrote: > Hi ! > > I'm running a pretty simple select query on a pretty large table (70000 > records). This table has some "flag" fields, each one textually explained > by another table ( flag VARCHAR(2), flag_details VARCHAR(60)) > > SELECT t.* , t1.flag1_details , ... , tn.flagn_details > FROM table t > NATURAL JOIN t1 > NATURAL JOIN ... > NATURAL JOIN tn > ORDER BY main_field OFFSET x LIMIT 50 > > There is no where statement, this query is for display purposes on a web > page. My problem is, where OFFSET is low, execution takes only a few > milli-seconds, but where OFFSET is high (50 last results for example), > execution can take 10 seconds... > Is there anything I can do to speed up such a query ? > > > ---------------------------(end of broadcast)--------------------------- > TIP 5: Have you checked our extensive FAQ? > > http://www.postgresql.org/docs/faqs/FAQ.html
В списке pgsql-general по дате отправления: