chklauser / flat-fetcher Goto Github PK

For OneToMany relations, flat-fetcher creates a plain old java collection to hold the fetched entities. Entity graph gets detached or if it gets used in a read-only transaction.

For read-write transactions, replacing the collection means that we hinder Hibernate's ability to track changes to the collection.

Oracle doesn't support more than ~1000 elements in a where .... in (...) predicate. If we have more than 1000 IDs, we need to fetch them in multiple batches.