Top 60 Oracle Blogs

Recent comments

Application Container

12cR2 Application Containers and Foreign Keys

Application Container brings a new way to share data among databases, and adds a new dimension to referential integrity. A foreign key in an application PDB can reference a row belonging to a root data link table. But then, should a delete on the root validate that there are no orpheans in the application PDBs? And what if those PDBs are closed at the time of this delete? Here is a small example.

If you run this in you will get an error because the search for parent key is done only on the current container. This is considered as a bug: 21955394: CDB:ORA-02291 WHEN FOREIGN KEY REFERS TO THE PRIMARY KEY IN DATA LINK

The example that follows is run with the patch applied to fix this bug.