* Tom Lane <[EMAIL PROTECTED]> wrote: > Enrico Weigelt <[EMAIL PROTECTED]> writes: > > c) CREATE FUNCTION id2username(oid) RETURNS text > > LANGUAGE 'SQL' IMMUTABLE AS ' > > SELECT username AS RESULT FROM users WHERE uid = $1'; > > This is simply dangerous. The function is *NOT* immutable (it is > stable though). When ... not if ... your application breaks because > you got the wrong answers, you'll get no sympathy from anyone.
In my case it is immutable. The username never changes. cu -- --------------------------------------------------------------------- Enrico Weigelt == metux IT service phone: +49 36207 519931 www: http://www.metux.de/ fax: +49 36207 519932 email: [EMAIL PROTECTED] cellphone: +49 174 7066481 --------------------------------------------------------------------- -- DSL ab 0 Euro. -- statische IP -- UUCP -- Hosting -- Webshops -- --------------------------------------------------------------------- ---------------------------(end of broadcast)--------------------------- TIP 9: the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match
