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Manual
3

Comparison in JPQL and Criteria API

ObjectDB supports two sets of comparison operators, as shown in the following table:   Set 1 - JPQL ... and expressions that include an unknown value are evaluated as unknown, i.e. to NULL. IS [NOT] NULL ... the same content. ObjectDB supports comparison of any two values that belong to the same group as
Manual
3

Entity Management Settings

the persistence context of the EntityManager (which serves as a first level cache). The valid values are "weak ... ") specifies if lazy loading of entity objects content is enabled. Instantiating entity objects as hollow ... is "true" or "false") specifies if serialization should be used as a fallback persisting method
Manual
3

JPA Primary Key

key cannot be modified. It represents the entity object as long as it exists in the database. As ... of other persistable types are always stored as part of their containing entity objects and do not ... automatically : } The @Id annotation marks a field as a primary key field. When a primary key field
Manual
3

JPA Query Structure (JPQL / Criteria)

rather than just field values from database tables, as with SQL. That makes JPQL more object oriented friendly and easier to use in Java. JPQL Query Structure As with SQL, a JPQL SELECT query also consists ... elements such as names of entity classes and persistent fields, which are case sensitive. In
Tutorial
3

Step 2: Entity Class and Persistence Unit

) and selecting New > Class. Enter guest as the package name - use exactly that case sensitive package name. Enter Guest as the class name - use exactly that case sensitive class name. Click Finish ... and clicking Next). Select the project src folder as a parent folder, enter META-INF as a new folder
Tutorial
3

Step 2: Entity Class and Persistence Unit

as Folder Name and click Finish. Open the [New Java Class] dialog box, e.g. by right clicking the new source directory node (in the [Package Explorer] window) and selecting New > Class. Enter guest as the package name - use exactly that case sensitive package name. Enter Guest as the class name
Issue
3

ObjectDB-2.6.9: Failed to commit transaction: Failed to set numeric value of field property Element.id using reflection

console app for NetBeans8.1 provided, as explained below). To reproduce download the app and unpack ... as owner project.addOwnedElement(model); Element example = new Element ... .java:822) at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:608) at org.jboss.weld.ejb
Manual
3

Chapter 6 - Configuration

from the location of the objectdb.jar file. It is defined as the path to the directory in ... directory is considered to be the ObjectDB home directory ($objectdb). As a result, $objectdb ... "); // new $objectdb As with any other system property it can also be set as an argument to the JVM
Manual
3

Database Management Settings

the background, a soon as new indexes are detected, in order to activate these new indexes. The priority attribute specifies the speed of the index building background process as a number between 10 and 70, indicating processing rate between 10% to 70% of the maximum database writing rate. As soon as
Manual
3

Database Server

embedded mode, ObjectDB is integrated as a library and runs within the application process, which is much more efficient. As a result, embedded mode should be preferred when possible. For example ... Server tool is bundled in the objectdb.jar file. You can run it from the command line as follows