Re: Incorrect behavior with CE and ORDER BY
От | Joshua D. Drake |
---|---|
Тема | Re: Incorrect behavior with CE and ORDER BY |
Дата | |
Msg-id | 453E5660.20608@commandprompt.com обсуждение исходный текст |
Ответ на | Re: Incorrect behavior with CE and ORDER BY (Alvaro Herrera <alvherre@commandprompt.com>) |
Список | pgsql-hackers |
Alvaro Herrera wrote: > Joshua D. Drake wrote: >> Tom Lane wrote: >>> "Joshua D. Drake" <jd@commandprompt.com> writes: >>>> We have a problem with CE that I want to verify is either expected >>>> behavior, a bug or something else :). >>> Uh, what's your problem exactly? The example only seems to demonstrate >>> that if you don't ask for a sort, you don't get one. >> Sorry. The problem is, if I ask for an ORDER BY it scans all partitions >> versus only scanning the partition that has the data in it. > > Huh, but that's not what the EXPLAIN ANALYZE you posted says ... > Sorry I realize the error of my ways. It isn't that it is scanning all partitions, it is that it is scanning all of a single partition (subject to the WHERE clause). That is correct behavior. Sincerely, Joshua D. Drake -- === The PostgreSQL Company: Command Prompt, Inc. === Sales/Support: +1.503.667.4564 || 24x7/Emergency: +1.800.492.2240 Providing the most comprehensive PostgreSQL solutions since 1997 http://www.commandprompt.com/ Donate to the PostgreSQL Project: http://www.postgresql.org/about/donate
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