...

MariaDB [controlloop]> select * from ExampleObjMap;
+---------------+---------+
| name          | version |
+---------------+---------+
| ExampleObjMap | 1.0.0   |
+---------------+---------+

MariaDB [controlloop]> select * from Example;
+----------+---------+--------+-----------+
| name     | version | primed | timeStamp |
+----------+---------+--------+-----------+
| example1 | 1.0.0   | NULL   | NULL      |
| example2 | 1.0.0   | NULL   | NULL      |
+----------+---------+--------+-----------+

MariaDB [controlloop]> select * from ExampleObjMap_Example;
+---------------+----------------+------------+---------------+--------------+
| parent_name   | parent_version | child_name | child_version | examples_KEY |
+---------------+----------------+------------+---------------+--------------+
| ExampleObjMap | 1.0.0          | example1   | 1.0.0         | MyKey1       |
| ExampleObjMap | 1.0.0          | example2   | 1.0.0         | MyKey2       |
+---------------+----------------+------------+---------------+--------------+

...

Multi templates

Right now using Spring repositories it is possible to create more than one service template, as service templates in policy-models/tosca. It works in both Eclipse-Link and Hibernate.

How to create additional service template (just add different name and version into the yaml file):

...

• Avoid default name and version (for each template/node/data type, etc.. name and version have to be mandatory)
• Java code to manual check for each table if name and version are already used

Conclusion

• The presence of longblob types used to store whole objects is definitely not so maintainable. The fix for those issues could be done in both Eclipse-Link and Hibernate.
• Document databases store all information for a given object in a single instance in the database, and every stored object can be different from every other. So, using MongoDB/Cassandra will solve all issues. JpaRepository and MongoRepository extend CrudRepository and expose the capabilities of the underlying persistence technology in addition to the rather generic persistence technology-agnostic interfaces like e.g. CrudRepository.