> On Jun 2, 2017, at 9:59 AM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>
> Robert Haas <robertmhaas@gmail.com> writes:
>> Also, you're attacking a straw man. Accidentally storing a meaningless
>> parse location in the catalog isn't a feature, and we shouldn't
>> pretend otherwise.
>
> It's not meaningless, and it is a feature, useful for debugging.
> Otherwise you'd have a hard time telling one occurrence of e.g. "+" from
> another when you're trying to make sense of a stored tree. We worked out
> all this behavior ages ago for other expression node trees that are stored
> in the catalogs (default expressions, index expressions, check
> constraints, etc etc) and I don't see a reason for partition expressions
> to be different.
Ok, that makes more sense now. Thanks for clarifying the history of how
and why the location field from parsing is getting stored.
> I agree that this means you can't just strcmp a couple of stored node tree
> strings to decide if they're equal, but you couldn't anyway --- a moment's
> perusal of equalfuncs.c will show you other special cases, each with their
> own rationale. Maybe you'd like to complain that every one of those
> rationales is wrongheaded but I do not think you will get far.
>
> I think the best advice for Mark is to look at pg_get_expr() output and
> see if that matches.
Yes, I'm already doing that based on the discussion so far.
Mark Dilger
