On Thu, 10 Nov 2011 17:46:47 -0500 "David Johnston" <polobo@xxxxxxxxx> wrote: >-----Original Message----- >From: pgsql-general-owner@xxxxxxxxxxxxxx >[mailto:pgsql-general-owner@xxxxxxxxxxxxxx] On Behalf Of Tarlika >Elisabeth Schmitz >Sent: Thursday, November 10, 2011 5:18 PM >To: pgsql-general@xxxxxxxxxxxxxx> >Subject: PL/pgSQL: SELECT INTO variables - no result > >I go through a series of SELECT INTO in a trigger function. > >SELECT INTO country_id id >FROM vcountry WHERE [...]; > >I might or o might not find a result. > >Next, I try to find a region within this country, if found previously, >and if not anywhere. > >SELECT INTO > country_id, region_id > country_fk, id >FROM vregion >WHERE (country_id IS NULL OR country_fk = country_id) AND name ILIKE >place; > >If the first search found a country, and the second search fails to >find the region, the second search will set my variables to NULL. So, >a previously populated country_id will now be NULL. > > >Is there any way I can avoid this or do I have to use different sets of >variables? > >------------------------------------ > >Don't return the "country_fk" field in your SELECT list, just the >[region_]id If the country search returns no results and the region search does, then I get the country_id via the region. If zero results nulls the variables, I suppose I have to use two sets of variables. -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
