Re: Export user visible function to make use of convert_to_scalar

Gregory Stark <stark@enterprisedb.com> writes:
> Attached is a patch which implements, as discussed briefly on -hackers, a
> user-visible function to get at the information that convert_to_scalar uses to
> generate selectivity estimates.

This is an astonishingly bad idea, as it exposes and thereby sets in
stone one of the worst, most in-need-of-rethinking areas in selfuncs.c.

> I didn't add any documentation because I couldn't find a reasonable place to
> put such a low level function.

No kidding.

> I don't think we would want to encourage
> applications to use it

The way to not encourage it is to not provide it.

            regards, tom lane