cross-database references are not implemented

Hoi,

I have a database with 2 schemas:

- public

- export

In the export schema I have tables that are filled during an export process.

There is some data I want to have in a table in the public schema as well.

I wrote a trigger function that after insert in the export table does an export in the public table.

If I do an insert I get the error message: "ERROR:  cross-database references are not implemented".

How can I solve this?

Met vriendelijke groet,

Paul Dam