> -----Original Message-----
> From: Peter Eisentraut
>
> Tom Lane writes:
>
> > In my mind the point of the "database" concept is to provide a domain
> > within which custom datatypes and functions are available.
>
AFAIK few users understand it and many users have wondered
why we couldn't issue cross "database" queries.
> Quoth SQL99:
>
> "A user-defined type is a schema object"
>
> "An SQL-invoked routine is an element of an SQL-schema"
>
> I have yet to see anything in SQL that's a per-catalog object. Some things
> are global, like users, but everything else is per-schema.
>
So why is system catalog needed per "database" ?
Regards.
Hiroshi Inoue
Inoue@tpf.co.jp
