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About ENABLE_SELECTIVE

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Manual
6

Running JPA Queries

The Query interface defines two methods for running SELECT queries: Query.getSingleResult - for use ... query = em.createQuery("SELECT c FROM Country c", Country.class); ListSELECT c FROM Country c"); List results = query
Manual
6

CRUD Database Operations with JPA

objects in the database by using a simple query: Query q1 = em.createQuery("SELECT COUNT(p) FROM Point p"); System.out.println("Total Points: " + q1.getSingleResult()); The query string ("SELECT ... of a query that returns a single result: Query q2 = em.createQuery("SELECT AVG(p.x) FROM Point p
Forum
6

Class fields selection to store

Class fields selection to store
Forum
6

Selective merge/cascade of detatched entity

Selective merge/cascade of detatched entity
Tutorial
5

Getting Started with JPA - Eclipse Project

: Select File > Import... > Maven > Existing Maven Projects and click Next. Select the points-console directory as Root Directory and press ENTER. Select the project and click Finish. Run the project in Eclipse: Right click the project node and select Run As > Java Application. Select Main - point and click OK.
Manual
5

Paths and Types in JPQL and Criteria API

identification variables and SELECT result variables. Parameters - when instances of these classes are assigned ... through a NULL value The following query retrieves country names with their capital city names: SELECT ... of all the entity objects in the database, excluding Country entity objects: SELECT COUNT(e) FROM
Tutorial
5

Step 1: Install BIRT and ObjectDB Driver

 Eclipse IDE for Java EE Developers environment: Open the [Install] dialog box by selecting Help ... Neon, Oxygen) and press ENTER. Click the Select All button to select all the BIRT features. Complete ... To install the ObjectDB data source driver for BIRT: Open the [Install] dialog box by selecting Help
JPA Doc
5

javax.persistence.Cacheable

javax.persistence Annotation Cacheable Target: Classes Specifies whether an entity should be cached if caching is enabled when the value of the persistence.xml caching element is ENABLE_SELECTIVE or DISABLE_SELECTIVE. The value of the Cacheable annotation is inherited by subclasses
Manual
5

Locking in JPA

by another transaction. When using ObjectDB, optimistic locking is enabled by default and fully ... is completely automatic and enabled by default in ObjectDB, regardless if a version field (which is required by
Manual
5

JPA / JDO Class Enhancer

to be enhanced. Enhancement improves efficiency in three ways: Enhanced code enables efficient ... notifies ObjectDB whenever a persistent field is modified. Enhanced code enables lazy loading