You didn't say what version of PostgreSQL you're trying.
I recall old version doesn't used index for backward pagination.
Oleg
On Mon, 23 May 2005, Yves Vindevogel wrote:
I tried that, but
create index ixTest on table1 (pages desc, documentname)
gives me a syntax error
On 23 May 2005, at 20:03, Steinar H. Gunderson wrote:
On Mon, May 23, 2005 at 07:41:19PM +0200, Yves Vindevogel wrote:
However, when I query my db using for instance order by pages,
documentname, it is very fast.
If I use order by pages desc, documentname, it is not fast at
all, like it is not using the index properly at all.
Make an index on "pages desc, documentname asc".
/* Steinar */
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Homepage: http://www.sesse.net/
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Met vriendelijke groeten,
Bien ? vous,
Kind regards,
Yves Vindevogel
Implements
Regards,
Oleg
_____________________________________________________________
Oleg Bartunov, sci.researcher, hostmaster of AstroNet,
Sternberg Astronomical Institute, Moscow University (Russia)
Internet: oleg@sai.msu.su, http://www.sai.msu.su/~megera/
phone: +007(095)939-16-83, +007(095)939-23-83
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