Re: Performance of full outer join in 8.3
От | Christian Schröder |
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Тема | Re: Performance of full outer join in 8.3 |
Дата | |
Msg-id | 49E71721.4000800@deriva.de обсуждение исходный текст |
Ответ на | Re: Performance of full outer join in 8.3 (Grzegorz Jaśkiewicz <gryzman@gmail.com>) |
Ответы |
Re: Performance of full outer join in 8.3
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Список | pgsql-general |
Grzegorz Jaśkiewicz wrote: > On Wed, Apr 15, 2009 at 1:25 PM, Simon Riggs <simon@2ndquadrant.com> wrote: > >> The cost of the query seems accurate, so the absence of >> attachment_isins_attachment_idx on the 8.3 plan looks to be the reason. >> There's no way it would choose to scan 8115133 rows on the pkey if the >> other index was available and usable. >> > > hance my question, if there's index on it in 8.3 version of db. > I added an index on this column, but it didn't change the query plan. Stupid question: Do I have to analyze again or perform a reindex after adding the index? Regards, Christian -- Deriva GmbH Tel.: +49 551 489500-42 Financial IT and Consulting Fax: +49 551 489500-91 Hans-Böckler-Straße 2 http://www.deriva.de D-37079 Göttingen Deriva CA Certificate: http://www.deriva.de/deriva-ca.cer
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