12 | JPQL keyword in entity - what to do?.type.name, count(p.id)) from Product as p group by p.type.name I got this exception: com.objectdb ... .hplxtool.model.ResultData(p.type.name, count(p.id)) " + "from Product as p group by p.type.name ... .model.ResultData(p.type.name, p.done, count(p.id)) from Product as p group by p.type.name,p |
2 | Working with JPA Entity Objects are provided in the Storing Entities section. Entity objects retrieved from the database by ... is detected by the owning EntityManager and the update is propagated to the database on transaction ... , the existing managed entity object is returned without actually accessing the database (except retrieval by |
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2 | SELECT clause (JPQL / Criteria API), the following query returns Country objects that become managed by the EntityManager em: TypedQuery ... can be added to the SELECT clause by using a bound JOIN variable in the FROM clause. Nested path expressions ... with the containing entities. Therefore, embedded objects that are retrieved directly by a result path expression |
2 | Literals in JPQL and Criteria Queries), a feature that is not currently supported by all JPA implementations. String Literals JPQL follows ... . 'Adam', '') and a single quote character in a string is represented by two single quotes (e.g. 'Adam ... ", "abcd\n1234") but this is not supported by all the JPA implementations. Unlike most other JPQL |
2 | JPA ExceptionsJPA exceptions are represented by a hierarchy of unchecked exceptions: java.lang.Object java ... of the JPA exception class subtree is: General errors are represented directly by the PersistenceException class. Some specific errors are represented by subclasses of PersistenceException. For example |
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0 | Step 3: Define an EJB Session BeanOperations on the database will be performed by an instance of a session bean (EJB) class that we will define in this step: Open the [New Session Bean] dialog box by right clicking the guest package ... () { TypedQuery<Guest> query = em.createQuery( "SELECT g FROM Guest g ORDER BY g.id", Guest |
0 | getGroups()Method javax.jdo.FetchPlan Set getGroups() Return an immutable Set containing the names of all active fetch groups. The Set is a copy of the currently active groups and will not change based on subsequent changes to the groups. Returns: an immutable Set containing the names of all currently active fetch groups Since: JDO 2.0 |
0 | [ODB1] Chapter 1 - About ObjectDB ObjectDB is compliant with the JDO (Java Data Objects) standard, developed by Sun ... and Microsoft SQL Server. In addition, by using JDO you are backed up by a large community that's expanding ... to other platforms (Windows, Unix, Macintosh and almost any other platform), simply by taking the ObjectDB |
