Re: AW: LIMIT in DECLARE CURSOR: request for comments
От | Philip Warner |
---|---|
Тема | Re: AW: LIMIT in DECLARE CURSOR: request for comments |
Дата | |
Msg-id | 3.0.5.32.20001101002353.02ab1b00@mail.rhyme.com.au обсуждение исходный текст |
Ответ на | AW: LIMIT in DECLARE CURSOR: request for comments (Zeugswetter Andreas SB <ZeugswetterA@wien.spardat.at>) |
Список | pgsql-hackers |
At 14:14 31/10/00 +0100, Zeugswetter Andreas SB wrote: >> >> Which is why I like the client being able to ask the >> optimizer for certain kinds of solutions *explicitly*. > >Yes, something like: > set optimization to [first_rows|all_rows] > That's one way that is usefull for affecting all subsequent statements, but it would be nice to also allow such things in each statement, eg. in comments: /*++optimizer: fast_start, no_seq_scan */ select... ie. make all settable values dynamically settable in a statement. The scope of the settings would probably have to depend on the abilities of the optimizer - eg. how would subselects and views be handled? ---------------------------------------------------------------- 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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