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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

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

ObjectDB Website - Terms and Conditions of Use

1. Terms By accessing and using this web site, you agree to be bound by these web site Terms ... from using or accessing this site. The materials contained in this web site are protected by ... of these restrictions and may be terminated by ObjectDB Software at any time. Upon terminating your viewing

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

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

JPA Exceptions

JPA 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

ObjectDB License Agreement [ver. 2.0.4]

Please read carefully this software license agreement. By downloading, installing or using ... of this agreement will be binding, unless in writing and signed by an authorized representative of each party ... authorized by this agreement. 3. The free edition of the Software includes restrictions on the number

Step 3: Define an EJB Session Bean

Operations 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


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

[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

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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