Re: Unexpected query plan results
От | Dave Dutcher |
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Тема | Re: Unexpected query plan results |
Дата | |
Msg-id | 24448D36F8754ECEB66FC54EB9641623@tridecap.com обсуждение исходный текст |
Ответ на | Re: Unexpected query plan results (Anne Rosset <arosset@collab.net>) |
Ответы |
Re: Unexpected query plan results
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Список | pgsql-performance |
> -----Original Message----- > From: Anne Rosset > Subject: Re: [PERFORM] Unexpected query plan results > > >> > >>SELECT SUM(1) FROM item WHERE is_deleted = 'f'; sum > --------- 1824592 > >>(1 > >>row) > >>SELECT SUM(1) FROM item WHERE folder_id = 'tracker3641 > >></sf/sfmain/do/go/tracker3641?returnUrlKey=1243878161701>'; sum > >>-------- > >>122412 (1 row) > >>SELECT SUM(1) FROM item WHERE folder_id = 'tracker3641 > >></sf/sfmain/do/go/tracker3641?returnUrlKey=1243878161701>' AND > >>is_deleted = 'f'; sum ----- 71 (1 row) SELECT SUM(1) FROM > item WHERE > >>folder_id = 'tracker3641 > >></sf/sfmain/do/go/tracker3641?returnUrlKey=1243878161701>' AND > >>is_deleted = 't'; sum -------- 122341 (1 row) > >> > >> > > > >Something's not right here. If the whole table has only > 468173 rows, > >you can't have 1.8 million deleted rows where is_deleted = false. > > > >...Robert > > > > > The item table has 2324829 rows > The artifact table has 468173 rows. > Thanks, > Anne I'd been thinking about the sort, but I hadn't thought yet if that index scan on item could be made faster. Could you post the table definition of item including the indexes on it? Dave
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