John,
it's a good tradition to include query and their EXPLAIN ANALYZE.
Pg version is also useful.
Did you try GIN index ?
In 8.4 you can use gin index on (views,tsvector)
Oleg
On Tue, 25 Nov 2008, John Lister wrote:
Hi, is it possible to order the results of a full text search using another
field?
for example with the following table:
CREATE TABLE breadcrumbs (
node_id integer NOT NULL,
breadcrumb character varying,
textsearchable tsvector,
views integer,
CONSTRAINT pk_breadcrumbs PRIMARY KEY (node_id)
)
I'd like to do something like this
select node_id, views from breadcrumbs where textsearchable @@
to_tsquery('word') order by views desc limit 100;
As such I'd like to create a fts index on the textsearchable field and views
field such that it orders the results by the views column.
atm, this table has over 3M rows (and is likely to b magnitudes bigger) and
some words match hundreds of thousands of rows, The best i've got so far is
to create a fts index which is used and then the resulting rows are sorted in
memory. Unfortunately because of the number of rows returned this takes a few
seconds.
With a btree index i could index on the 2 columns and it would only hit the
index and take a fraction of a second.
I've tried the btree_gist module, but it doesn't make any difference (except
in letting me use an int in the gist index)
Any ideas or is this simply not possible?
Thanks
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Regards,
Oleg
_____________________________________________________________
Oleg Bartunov, Research Scientist, Head of AstroNet (www.astronet.ru),
Sternberg Astronomical Institute, Moscow University, Russia
Internet: [EMAIL PROTECTED], http://www.sai.msu.su/~megera/
phone: +007(495)939-16-83, +007(495)939-23-83
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