On Sat, Jan 11, 2014 at 10:06:27PM +0100, Pavel Stehule wrote: > > > > 2014/1/11 Tom Lane <tgl@sss.pgh.pa.us> > > Bruce Momjian <bruce@momjian.us> writes: > > Oh, I think you are right. I have reverted the patch. Attached is > > proposed documentation for '='. > > Meh. Variable initialization is only one of multiple cases (assignment, > GET DIAGNOSTICS; maybe others, I've not examined the grammar). Also, > if we do it like this, we're implying that both := and = are equally > preferred, which might not be the impression we want to leave. > > > GET DIAGNOSTICS is defined by standard - and there "=" should be allowed only - > although we allow ":=" too. It is a embedded SQL statement - although it is > implemented as plpgsql statement.
OK, docs updated for that. I assume OPEN and FOR also can take := or =, right?
no, there are not used assign_operator
It is used only in DECLARE DEFAULT, ASSIGN and GET DIAGNOSTICS
> Same situation is with UPDATE statement - we don't allow ":=" there. > > > > I'd be a bit inclined to just stick a NOTE somewhere saying that "=" > can be used in place of ":=" for assignment. > > > ok > > If we accept it and we close this topic, then following comment should be > removed > > assign_operator : '=' /* not documented because it might be removed someday *
