Question

I am using OpenJPA. If I want to do a mass delete/update using the executeUpdate() method, will the JPA cache be updated? Or will this bypass the JPA cache? When I say “cache”, I am talking about both the L1 and L2 caches. Does the type of query matter (native vs. JPQL)? Thank you.

Answer 1

The documentation says:

The persistence context is not synchronized with the result of the
bulk update or delete.

Caution should be used when executing bulk update or delete operations
because they may result in inconsistencies between the database and
the entities in the active persistence context. In general, bulk
update and delete operations should only be performed within a
transaction in a new persistence context or at the beginning of a
transaction (before entities have been accessed whose state might be
affected by such operations).

So, since OpenJPA doesn’t synchronize the L1 cache, I don’t see why it would (and how it could) synchronize the L2 cache. He could flush it, but I doubt it. It’s easy enough to test anyway.