Stephan Szabo <sszabo@megazone23.bigpanda.com> writes:
> Although the rules could be similar to those for + and - at the end of
> operator strings (no $ at the end of an operator unless it contains
> characters not normally in SQL92 operators). I'm not sure that
> behavior is sensible either, but if someone wanted to
> do it for their own installation it's about a 2 line patch.
It could be done that way. But given that "$" already has one weird
special case in the operator name rules (ie, it can't be the only
character of an operator name), I feel that we'd be making things overly
complicated.
The proposal back in Aug 2001 was to remove "$" from the set of operator
name characters altogether (which would allow us to use it in
identifiers instead, improving Oracle compatibility). I originally
objected to that idea on backwards-compatibility grounds, but I'm
leaning more and more to the view that it's the right thing to do.
I've re-opened the thread on pgsql-hackers about this, and we'll see
whether any consensus emerges this time.
regards, tom lane