Hello!

i've got a question on my problem..
i'm using contrib/fulltextindex to index my tables to do a fulltext search
but i'm using a non-default locale settings on my database.
i found out that if the locale is default 'C' then fulltextindex tables are
scanned very fast using btree indices. for sure, i'm using prefix match
(string ~ '^blabla') which is supposed to scan the table in this way.. so
it's ok!
but if i change to different locale (i.e. sk_SK or cs_CZ) the fti table is
scanned sequentially and it's very slow.. so, the more words are there in my
fti table and the more more words i'm trying to search at once using table
join the slower is the search..

so my question is.. is this a bug or the prefix match is not supported to
perform a table scan using indices under non-default locale?
please, give me a hint..

regards

Tomas Lehuta




Mon, 22 Jul 2002 09:37:46 +0200
"Tomas Lehuta" <lharp@aurius.sk>
contrib/fulltextindex
It's known problem with LIKE and non-C locale.
You may try contrib/tsearch for full text search. It's works with
locale and does index search.

	Oleg
On Mon, 22 Jul 2002, Tomas Lehuta wrote:

> Hello!
>
> i've got a question on my problem..
> i'm using contrib/fulltextindex to index my tables to do a fulltext search
> but i'm using a non-default locale settings on my database.
> i found out that if the locale is default 'C' then fulltextindex tables are
> scanned very fast using btree indices. for sure, i'm using prefix match
> (string ~ '^blabla') which is supposed to scan the table in this way.. so
> it's ok!
> but if i change to different locale (i.e. sk_SK or cs_CZ) the fti table is
> scanned sequentially and it's very slow.. so, the more words are there in my
> fti table and the more more words i'm trying to search at once using table
> join the slower is the search..
>
> so my question is.. is this a bug or the prefix match is not supported to
> perform a table scan using indices under non-default locale?
> please, give me a hint..
>
> regards
>
> Tomas Lehuta
>
>
>
>
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>
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	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


Mon, 22 Jul 2002 11:30:09 +0300 (GMT)
Oleg Bartunov <oleg@sai.msu.su>
Re: contrib/fulltextindex