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Forum
21

Retrieving Metamodel without connection

Retrieving Metamodel without connection
Issue
21

Enable intern() for Retrieved Strings

Enable intern() for Retrieved Strings
Issue
21

Retrieving Metamodel without Connection

Retrieving Metamodel without Connection
Manual
20

JPA Metamodel API

The JPA Metamodel API provides the ability to examine the persistent object model and retrieve ... to retrieve sets of types: // Get all the managed classes: // (entity classes, embeddable classes ... are already stored in the database. Three additional methods can be used to retrieve a specific type by its Class
Manual
18

DELETE Queries in JPA/JPQL

As explained in chapter 2, entity objects can be deleted from the database by: Retrieving ... an alternative way for deleting entity objects. Unlike SELECT queries, which are used to retrieve data from the database, DELETE queries do not retrieve data from the database, but when executed, delete specified
Manual
18

JPA Entity Fields

the database, but is still available after retrieval by a special automatic query. Note: Navigation ... . Instead, employees is automatically populated when a Department entity is retrieved from ... , the order of the retrieved owner entities can be set by the OrderBy annotation: @Entity public class
Manual
18

JPA Primary Key

the database is uniquely identified (and can be retrieved from the database) by the combination of its type ... is required if entity objects have to be retrieved by their primary key as shown in the Retrieving ... that queries that retrieve all the events of a specified sensor in a specified period are common and return
Manual
18

UPDATE SET Queries in JPA/JPQL

Existing entity objects can be updated, as explained in chapter 2, by: Retrieving the entity ... an alternative way for updating entity objects. Unlike SELECT queries, which are used to retrieve data from the database, UPDATE queries do not retrieve data from the database, but when executed, update
JDO Doc
16

javax.jdo.PersistenceManager

retrieve(Object pc) Retrieve field values of an instance from the store. Retrieve field values ... the instance, and its field values must be retrieved. The PersistenceManager might use policy information about the class to retrieve associated instances. Parameters: pc - the instance Since: JDO 1.0
Manual
15

FROM clause (JPQL / Criteria API)

, consider the following INNER JOIN query that retrieves pairs of (country name, capital name): SELECT c ... instances.  Consequently, the loop that iterates over the results is inefficient, since retrieval ... Country objects because it eliminates the need for retrieving the associated Capital objects separately