Get a list of databases that have a certain table I'm trying to get a list of databases from a Postgresql instance that contains a certain table.  I've started using the system catalog tables to try and figure this out.  I was trying to use pg_database, pg_class, pg_tables but I couldn't seem to find a way to link pg_class/pg_table back to pg_database to get the database for a given table.

If anyone has any ideas please let me know.  It's probably just something stupid that I'm misising.

Thanks in advance.
This is not possible by a single query, because queries cannot span multiple databases, and the list of tables is only contained within the individual databases.