Re: Array types and loading
От | Aaron Birkland |
---|---|
Тема | Re: Array types and loading |
Дата | |
Msg-id | 19ab0ccd04081814473ca44daf@mail.gmail.com обсуждение исходный текст |
Ответ на | Re: Array types and loading (Tom Lane <tgl@sss.pgh.pa.us>) |
Список | pgsql-performance |
You got it.. 7.3 (should have mentioned that). We're planning to upgrade to 8.0 anyway in the future, so it's good to know. Thanks! -Aaron On Wed, 18 Aug 2004 17:39:21 -0400, Tom Lane <tgl@sss.pgh.pa.us> wrote: > Aaron Birkland <birkie@gmail.com> writes: > > In a nutshell, it looks like whenever COPY is invoked, and when a user > > defined type is used in an array, then stat64() will be called for > > each row accessed on the shared library relevant for the user defined > > type. > > Let me guess ... PG 7.3 or older? > > 7.4 should avoid the problem because array_in() caches function lookup > information for the element type's input function across multiple calls. > > In 8.0 there's also a cache at the fmgr_info() level to eliminate > repeated searches for a dynamically loaded function. > > regards, tom lane >
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