Gregory Stark <stark(at)enterprisedb(dot)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