ALTER TABLE companies
  ADD COLUMN fti_business tsvector;

  UPDATE companies SET fti_business = to_tsvector('default',business_model);

  VACUUM FULL ANALYZE companies;

  CREATE INDEX idx_fti_business ON companies USING gist(fti_business);

  CREATE TRIGGER tg_fti_companies
  BEFORE UPDATE OR INSERT ON companies
  FOR EACH ROW EXECUTE PROCEDURE
    tsearch2(fti_business, business_model);

  SELECT company_name, business_model
  FROM companies
  WHERE fti_business @@
    to_tsquery('default','bushing | engine');

URL: http://www.opennet.me/opennews/art.shtml?num=3801
Обсуждается: http://www.opennet.me/tips/info/677.shtml

• Полнотекстовый поиск в PostgreSQL (Tsearch2),яков, 17:07 , 21-Сен-07

не плохо было бы указывать версию PostgreSQL. начиная с 8.2 там все сильно изменилось с tsearch2...