We have the following scenario:
We have an Oracle database in a secure zone (called inner). We want to expose a subset of its data (which is represented by a view) to another Oracle database in another (unsecure) zone (called outter).
We considered to do that with a database link from outter to inner. However, we have a very odd restriction:
It's not allowed to make requests from outter to inner. We are only allowed to push data from inner to outter.
A database link would violate this constraint as it would allow outter to make "requests" (SQL queries) to inner. So we need another solution.
We already thought of a regularly triggered export from inner which gets imported in outter. That would be OK, but we would prefer a solution which always provides up-to-date date in outter.
Any ideas?