"Mendola Gaetano" <[EMAIL PROTECTED]> writes:
> I'm running a Postgres 7.3.3 and I had the necessity to
> rename a DB, I did this by updating the pg_database
> table.
> If I perform psql -l  I'm able to see that is reported the
> correct name ( I guess because a select on pg_database
> table is performed ) but if I try to connect to the DB
> after the renaming I obtain the error: 
> psql: FATAL:  Database "new_name" does not exist in 
> the system catalog.

Try vacuuming pg_database (you can do this from any database,
it need not be the one that is having the problem).

                        regards, tom lane

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