Hi all,
The following example is given in the Postgres 8.3 manual regarding how to
create a single ts_vector column for two existing columns:
ALTER TABLE pgweb ADD COLUMN textsearchable_index_col tsvector;
UPDATE pgweb SET textsearchable_index_col =
to_tsvector('english', coalesce(title,'') || coalesce(body,''));
Then we create a GIN index to speed up the search:
CREATE INDEX textsearch_idx ON pgweb USING gin(textsearchable_index_col);
Now we are ready to perform a fast full text search:
SELECT title
FROM pgweb
WHERE textsearchable_index_col @@ to_tsquery('create & table')
ORDER BY last_mod_date DESC LIMIT 10;
Using this approach. Is there any way of retrieving which of the original
two columns the match was found in?
Any help would be much appreciated,
Ryan
