Re: cannot read pg_class without having selected a database / is this a bug?

Robert Haas <robertmhaas@gmail.com>

From: Robert Haas <robertmhaas@gmail.com>

To: Tomas Vondra <tv@fuzzy.cz>

Cc: pgsql-hackers@postgresql.org

Date: 2011-12-03T22:37:07Z

Lists: pgsql-hackers

2011/12/3 Tomas Vondra <tv@fuzzy.cz>:
> psql: FATAL:  cannot read pg_class without having selected a database
>
> I've found this happens because the extension defines a client auth hook
> that reads pg_stat_activity. The really interesting thing is that this
> happens only when I start several backends 'at the same time' right
> after the cluster is started. From that time, everything works just fine.

I'm surprised this ever works.  To read pg_stat_activity, you need a
relcache entry for it.  And how will you build one without selecting a
database?

-- 
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company