On Thu, Aug 11, 2016 at 10:54 PM, Tom Lane <[email protected]> wrote:
> I think what is happening
> in the trouble case is that since IS has lower precedence than Op, the
> grammar decides it ought to resolve || as a postfix operator, and then
> it effectively has
> ('x' ||) IS ...
> which leaves noplace to go except IS NULL and other IS-something syntaxes.
I wonder whether it's really worth keeping postfix operators. They
seem to keep causing these kinds of headaches and I wonder how much
the grammar tables would be simplified by removing them.
--
greg
--
Sent via pgsql-hackers mailing list ([email protected])
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-hackers
