st 19. 12. 2018 v 19:01 odesílatel Tom Lane <tgl@sss.pgh.pa.us> napsal:
Pavel Stehule <pavel.stehule@gmail.com> writes: > st 19. 12. 2018 v 17:59 odesílatel Tom Lane <tgl@sss.pgh.pa.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 :-(
I found this index in pg_class file . But that is all what I can say - I don't know if this table is readable or not.