Re: Unable to Connect to DB Instance

Boblitz John <john(dot)boblitz(at)bertschi(dot)com> writes:
> Thanks - I get "pg_db_role_setting" as a response.

Hm ... not its index? If the table itself is gone, it's surprising
that you can get through session startup.

> I have already attempted to reindex system but get:

I had in mind just reindexing the specific table you're having trouble
with ... but this:

> ERROR: could not open file "base/11919/11680": No such file or directory

shows that there's another table that also has a problem, and there
may be more :-(. I don't know what the odds are that you can get out
of this completely. I would NOT recommend "reindex system" as a
blunderbuss solution. You do not know how much is corrupted and there's
a significant chance of making things worse by tromping over the whole
database using catalogs of uncertain reliability.

Did you identify which table 11680 is?

In the case of pg_db_role_setting, a possible solution is to "touch" the
missing file so it exists; it'll be empty, which means that you'll have
lost any ALTER DATABASE/ROLE SET settings, but that's better than not
being able to dump at all. (You might then need to REINDEX
pg_db_role_setting to get its indexes in sync with it being empty.)

Whether an equally drastic answer is tolerable for your other missing
table(s) depends on what they are...

regards, tom lane