Nathan Bossart <nathandboss...@gmail.com> writes: > On Wed, Nov 01, 2023 at 09:57:18PM -0400, Tom Lane wrote: >> After digging around for a bit, I think part of the problem is a lack >> of a clearly defined spec for what should happen with NULL string GUCs.
> What if we disallowed NULL string GUCs in v17? Well, we'd need to devise some other solution for hacks like the one used by timezone_abbreviations (see comment in check_timezone_abbreviations). I think it's not worth the trouble, especially seeing that 95% of guc.c is already set up for this. The bugs are mostly in newer code like get_explain_guc_options, and I think that's directly traceable to the lack of any comments or docs about this behavior. regards, tom lane