Territorial relational database

I am looking for a database that provides the following:

• completely ACID.
• merges with unions.
• has transactions.
• Allows the administrator to specify table of contents rules (for example, users from Europe must be located in a European data center).
• The most difficult requirement: with a network partition like two data centers disconnected from each other, each data center must be able to read and write nodes in it. Basically, I'm willing to sacrifice partial accessibility for partitions tolerance. Unfortunately, most solutions will stop all reads and writes in the event of a split brain. (thus preferring accessibility over valid splitting)