pg_tables column descriptions

pw wrote:

Hello,

Where can I find the column descriptions for pg_tables?

http://developer.postgresql.org/docs/postgres/catalogs.html. Remember that this
is development version of documentation. So applies to CVS tip.

Or:

What linking field do I use to connect pg_tables with pg_database?

I am confused. Why would you need to do that? pg_class is not a shared catalog.
So if you connect to a database foo, the pg_class you are looking at is that for
database foo. It's simple.

What's the problem exactly?

Shridhar