On Sat, 27 Aug 2011 18:45:42 -0300 Osvaldo Kussama <osvaldo.kuss...@gmail.com> wrote:
>2011/8/27, Tarlika Elisabeth Schmitz ><postgres...@numerixtechnology.de>: >> Hello, >> >> In a PL/pgSQL trigger function, I try to select a record from table >> "town" below. >> >> I am only interested in the result if the returned result set >> contains exactly one result. >> If there is more than one result, I want to log the fact. >> >> EXAMPLE pseudo code >> >> select >> country_fk, region_fk, id >> from town >> where name = 'Newcastle' >> >> if found and count = 1 >> populate country_id, region_id, town_id >> else >> raise notice 'ambiguous %', town.name >> >>[...] >> -- > > >Use: >GET DIAGNOSTICS integer_var = ROW_COUNT; SELECT INTO country_id, region_id, town_id country_fk, region_fk, id FROM town WHERE ...; GET DIAGNOSTICS cnt = ROW_COUNT; RAISE DEBUG 'COUNT %', cnt; always returns 1 -- Best Regards, Tarlika Elisabeth Schmitz -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
