On 2014-04-02 12:27:30 -0400, Tom Lane wrote: > David Johnston <pol...@yahoo.com> writes: > > Does something like: > > SELECT ($1 + $2)::$1%TYPE > > exist where you can explicitly cast to the type of the input argument? > > I don't think SQL-language functions have such a notation, but it's > possible in plpgsql, if memory serves.
Sometimes you can play nasty tricks using COALESCE() to force a cast like that. E.g. SELECT COALESCE(NULLIF($1, $1), $1 + $2); Greetings, Andres Freund -- Andres Freund http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
