Re: COPY vs INSERT
От | Jim C. Nasby |
---|---|
Тема | Re: COPY vs INSERT |
Дата | |
Msg-id | 20050506065129.GL88920@decibel.org обсуждение исходный текст |
Ответ на | Re: COPY vs INSERT (Tom Lane <tgl@sss.pgh.pa.us>) |
Ответы |
Re: COPY vs INSERT
Re: COPY vs INSERT |
Список | pgsql-performance |
On Wed, May 04, 2005 at 10:22:56PM -0400, Tom Lane wrote: > Also, there is a whole lot of one-time-per-statement overhead that can > be amortized across many rows instead of only one. Stuff like opening > the target table, looking up the per-column I/O conversion functions, > identifying trigger functions if any, yadda yadda. It's not *that* > expensive, but compared to an operation as small as inserting a single > row, it's significant. Has thought been given to supporting inserting multiple rows in a single insert? DB2 supported: INSERT INTO table VALUES( (1,2,3), (4,5,6), (7,8,9) ); I'm not sure how standard that is or if other databases support it. -- Jim C. Nasby, Database Consultant decibel@decibel.org Give your computer some brain candy! www.distributed.net Team #1828 Windows: "Where do you want to go today?" Linux: "Where do you want to go tomorrow?" FreeBSD: "Are you guys coming, or what?"
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