Re: single user mode -P option is ignored

Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> writes:
> st 19. 12. 2018 v 17:59 odesílatel Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> napsal:
>> So either this is something we fixed since 9.5.5, or your summary
>> of the problem is missing many critical details.

> I got different error message "could not open critical system index". I
> checked files, and related files was there.

Hmm ... looking at the relcache code, it appears that could only happen
if the pg_class entry for that index couldn't be found. Which probably
means you've suffered catastrophic damage to pg_class --- there's no
good reason to assume that only that one row has been clobbered.
Reindexing isn't going to get you out of that :-(

regards, tom lane