Re: Allowing extensions to supply operator-/function-specific info

Paul Ramsey  writes:
> I had what seemed to be working code except for a couple rare cases,
> but when I fixed those cases it turned out that I had a major problem:
> building a  OP  expression works fine, but building a
>  OP  expression returns me an error.

Yup, you're not supposed to do that.  The output expression *must* have
the index key on the left, it's up to you to commute the operator if
needed to make that happen.

			regards, tom lane