On Mon, Mar 27, 2006 at 04:33:55PM +0200, Wiebe Cazemier wrote: > Hi, > > In a plpgsl function, consider the following excerpt: > > DECLARE > provider_id INTEGER; > BEGIN > provider_id := (SELECT provider_id FROM investment_products WHERE id = > my_new.investment_product_id); > END; > > After a lot of trouble, I found out this line doesn't work correctly > with the variable name as it is. It doesn't give an error or anything, > it just retrieves some wrong value (probably NULL). When I change the > variable name to anything other than "provider_id", it works OK. > > I was somewhat surprised to discover this. Can't Postgres determine that > the provider_id in the SELECT statement is not the same one as the variable?
Sadly, overloading variable names between plpgsql and SQL is *highly* problematic. Because of this I *always* prefix plpgsql variables with something, such as p_ for parameters and v_ for general variables. -- Jim C. Nasby, Sr. Engineering Consultant [EMAIL PROTECTED] Pervasive Software http://pervasive.com work: 512-231-6117 vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461 ---------------------------(end of broadcast)--------------------------- TIP 3: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faq
