Re: pgsql/src/backend/nodes (copyfuncs.c outfuncs.c print.c)
От | Philip Warner |
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Тема | Re: pgsql/src/backend/nodes (copyfuncs.c outfuncs.c print.c) |
Дата | |
Msg-id | 3.0.5.32.20001027204352.00a06540@mail.rhyme.com.au обсуждение исходный текст |
Ответ на | Re: pgsql/src/backend/nodes (copyfuncs.c outfuncs.c print.c) (Tom Lane <tgl@sss.pgh.pa.us>) |
Список | pgsql-committers |
At 20:17 26/10/00 -0400, Tom Lane wrote: > >Possibly the optimizer should always assume that cursors ought to >be optimized for fast start, LIMIT or no LIMIT --- does that seem >like a good idea to you? > No to me; I'd vote for an 'OPTIMIZE FOR FAST START' phrase ahead of always doing a fast start. It also seems natural that a LIMIT clause should (a) limit the results in all cases and (b) be used by the optimiser in such a way that it *considers* a fast start approach more carefully. ---------------------------------------------------------------- Philip Warner | __---_____ Albatross Consulting Pty. Ltd. |----/ - \ (A.B.N. 75 008 659 498) | /(@) ______---_ Tel: (+61) 0500 83 82 81 | _________ \ Fax: (+61) 0500 83 82 82 | ___________ | Http://www.rhyme.com.au | / \| | --________-- PGP key available upon request, | / and from pgp5.ai.mit.edu:11371 |/
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