On Wed, Feb 08, 2006 at 05:59:19PM -0400, Rodolfo Campos wrote:
> I'm wondering if in postgres we can insert a tuple into a table that is
> outside of a database (I'm supossed to be connected to database1 and want to
> insert a register into a table in database2).
You can do this with contrib/dblink; search the list archives for
other possibilities (PL/Perl + DBI + DBD::Pg, dbi-link, etc.).
> This question is because I want to update a tables into one database from a
> trigger (written in C), and the table who fires the trigger is in another
> database.
A C function can use libpq to connect to another database; that's
how dblink works. But such a design is often a hint to consider
using separate schemas in the same database rather than separate
databases. A problem with actions that take place outside the
current database is that you lose transactional control: if the
triggering transaction rolls back then you have no way to roll back
the outside changes.
--
Michael Fuhr
