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Manual
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GROUP BY and HAVING clauses

The GROUP BY clause enables grouping of query results. A JPQL query with a GROUP BY clause returns properties of generated groups instead of individual objects and fields. The position of a GROUP BY ... the first letters as result. ObjectDB is very flexible in allowing JPQL expressions anywhere in
Manual
8

WHERE clause (JPQL / Criteria API)

variable. Before passing these Country objects to the SELECT clause for collecting as query results ... and then collected as query results. WHERE Predicate and Indexes Formally, the WHERE clause functions as
Result
8

Eclipse Public License - v 1.0

, and if a court requires any other Contributor to pay any damages as a result, the Commercial ... . Each party waives its rights to a jury trial in any resulting litigation.
Result
8

What is new in ObjectDB 2.0?

query execution. Support of composite indexes and using indexes in query result sort. Improved query ... with different arguments. Query result cache for repeating queries with identical arguments. Improved
Manual
8

Locking in JPA

JPA 2 supports both optimistic locking and pessimistic locking. Locking is essential to avoid update collisions resulting from simultaneous updates to the same data by two concurrent users. Locking ... ); A lock mode can also be set for a query in order to lock all the query result objects. When a retrieval
Manual
8

Deleting JPA Entity Objects

Existing entity objects can be deleted from the database either explicitly by invoking the remove method or implicitly as a result of a cascade operation. Explicit Remove In order to delete an object ... since disconnecting a relationship is not a remove operation. To avoid dangling references as a result
Tutorial
8

Step 4: Create an ObjectDB Data Set

): You may click Preview Results to see the query results: Close the dialog box by clicking the OK button. In
Manual
8

Database Transaction Replayer

files and tries to apply all the recorded operations. The resulting database file is also generated in ... succeeds, and all the operations until transaction 1000 are applied, the generated result file is expected to be 1000.odb.
Result
8

ObjectDB - Object Database for Java (JPA/JDO) [2017-10-19]

direct storage of graphs of objects and eliminates the ORM layer. The result is better performance and faster applications, especially when the object data model is complex. See JPA benchmark results
Manual
8

Entity Management Settings

"false" when using JPA. The on-persist attribute specifies whether cascading (as a result ... whether cascading (as a result of either global or local setting) should be applied during commit and flush