Re: postgres slower on nested queries

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От Tom Lane
Тема Re: postgres slower on nested queries
Дата
Msg-id 8435.1173215891@sss.pgh.pa.us
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Ответ на Re: postgres slower on nested queries  (Richard Huxton <dev@archonet.com>)
Ответы Re: postgres slower on nested queries  (Richard Huxton <dev@archonet.com>)
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Richard Huxton <dev@archonet.com> writes:
> Alexander Elgert wrote:
>> I found the postgres version VERY slow, so a decided to fetch

> Define VERY - it took what, milliseconds to do this? Seconds? Hours?

I think he's complaining that the standards-conformant view in Postgres
is slower than the specialized SHOW command in mysql.  For an
apples-to-apples comparison, select directly from the system catalogs
--- the information_schema views are definitely slower, because they
have to enforce various spec restrictions (eg that you can't see info
about tables you don't have access to).

            regards, tom lane

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