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Manual
15

Paths and Types in JPQL and Criteria API

Instances of user defined persistable classes (entity classes, mapped super classes and embeddable classes) are represented in JPQL by the following types of expressions: Variables - FROM identification variables and SELECT result variables. Parameters - when instances of these classes are assigned
Manual
15

FROM clause (JPQL / Criteria API)

identification variables that iterate over all the database objects of a specific entity class hierarchy (i.e. an entity class and all its descendant entity classes). Identification variables are always polymorphic. JPQL does not provide a way to exclude descendant classes from iteration
Manual
15

JPA Named Queries

is attached to exactly one entity class or mapped superclass - usually to the most relevant entity class. But since the scope of named queries is the entire persistence unit, names should be selected ... to add the above @NamedQuery to the Country entity class: @Entity @NamedQuery(name="Country.findAll
Issue
15

Schema-Update: Deactivation of automatic entity class removing and introduction of a new class remove in the schema config

works correctly we add ALL entity classes to this product. Because we will prevent a data loss of entites which are not found in the class path. With this background it would be very helpful for us if we could ignore in the ProfileMigration the classes we had not changed. And we were able
Manual
14

Index Definition

.annotations.Unique; @Entity public class EntityWithSimpleIndex { @Index String ... , float, double. Equivalent wrapper classes from package java.lang: Byte, Short, Character, Integer ... ","firstName"}) public class EntityWithCompositeIndex { String firstName; String lastName
Tutorial
14

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 Java Class] dialog box by right clicking the guest package node (in the [Package Explorer] window) and selecting New > Class. The package name should be guest
Manual
14

Retrieving JPA Entity Objects

of entity classes and to keep them simple as possible. Retrieval by Class and Primary Key Every entity object can be uniquely identified and retrieved by the combination of its class and its primary key ... whose primary key is 1: Employee employee = em.find(Employee.class, 1); Casting of the retrieved
Manual
14

Database Explorer [2011-09-21]

objects. The [Schema] window shows the user defined persistable types (entity and embeddable classes ... an element for viewing (an entity class in the [Schema] tabbed window, a bookmark in the [Database ... the entity class and specify the number of objects to construct. Click the Create and Persist button
Manual
14

Database Explorer

objects. The [Schema] window shows the user defined persistable types (entity and embeddable classes ... an element for viewing (an entity class in the [Schema] tabbed window, a bookmark in the [Database ... the entity class and specify the number of objects to construct. Click the Create and Persist button
Result
14

ObjectDB Object Database Features [2018-01-27]

entity classes per database file. Up to 2,147,483,648 indices per database file ... . Class hierarchy changes are handled automatically. New added fields are handled automatically ... fields up and down in the class hierarchy is transparent. Support for renaming types, fields