Bruno Harbulot <bruno(at)distributedmatter(dot)net> writes:
> That said, I'd still suggest providing new operators and deprecating the
> ones containing a question mark if possible. (There are 8 distinct operator
> names like this: "?-", "?&", "?", "?#", "?||", "?-|", "?|" and "<?>".)
There are more in contrib ...
regards, tom lane