Db and schema names in logged errors

Is there any way to get the DB and schema name into
error messages, particularly when the errors
are logged?  I'd like to be able to distinguish
errors coming from the test databases from those
coming from the live databases.

Thanks.

Karl <kop@meme.com>
Free Software:  "You don't pay back, you pay forward."
                  -- Robert A. Heinlein