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All about Is ObjectDB better than Object Relational Mapping (ORM)? in Java/JPA database - explanations, examples, references, links and related information.

I have an entity with an embedded object - it works fine. Now I am trying to add an embedded object inside the first level embedded object - but it does not seem to store it and does not throw either... I was wondering if it was a limitation or not

The ability to retrieve managed entity objects is a major advantage of JPQL. For example, the following query returns Country objects that become managed by the (); Because the results are managed entity objects they have all the support

window displays a list of bookmarked entity objects. The [Schema] window shows the user ... of traditional visual database tools. Every row in the table represents a single object, every column ... database object. This type of viewer is useful for viewing data of a simple object model. In

object level, i.e. each database object is locked separately. Optimistic locking is applied on transaction commit. Any database object that has to be updated or deleted ... of a database object, for which another update has already been committed by another transaction.

>em, that represents a JPA connection to the object database, we can use it to store, retrieve, update and delete database objects. Storing New Entity Objects The following code fragment stores 1,000 Point objects in the database:

The Java Data Objects (JDO) is another standard for accessing persistent data in databases, using plain old Java objects (POJO) to represent the object model. Unlike Java Persistence API ... with both relational and object databases. JDO is supported by many object databases, including ObjectDB

Static Field javax.jdo.ConstantsString OPTION_MAPPING_HETEROGENEOUS_OBJECT_TYPE

;Browsing the Database The ability to explore database objects visually, navigate ... window displays a list of root objects that the database contains (root objects are discussed in objects. The Table window displays

There are various ways to retrieve objects from an ObjectDB database, as shown in objects">section 6.3. An Extent ... for RDBMS. It provides object retrieval from the database according to a specified selectioPlan