STOCKHOLM, Sweden, April 9, 2013 – Enea® (NASDAQ OMX Nordic:ENEA), a world leading operating system solution vendor for 3G and 4G infrastructure equipment, is today announcing version 8.7 of the In-Memory Database Management System Polyhedra®, adding locking and cascaded deletes to the Polyhedra family, while still securing the best practices in real-time applications.

Locking

Database locking allows an application to claim part of the database, so that others cannot make changes while the client with the lock is deciding on the changes it wants to make. In comparison with locking on database, table, or row, Polyhedra even makes it possible to lock individual fields of a record, which is critical for real-time systems. This allows, for example, one client to lock configuration fields for a record without stopping other applications updating the value field as new readings come in. Polyhedra also allows locks to be specified as pessimistic or optimistic and can automatically convert pessimistic locks to optimistic locks after a short period. The new locking mechanism is integrated into Polyhedra’s user-based security system, so the database administrator can control which tables, and which attributes of a table, someone can lock.

Cascaded deletes

Polyhedra allows the database administrator to define cross-references between tables, by saying that a field is a ‘foreign key’ to another table in the database. It also enforces referential integrity – which means that if the value in a record for a foreign key attribute is non-null, then the record pointed at must exist. The person creating the tables containing the foreign keys can say what should happen when the referenced record is deleted: instead of the default behavior of failing the transaction to maintain integrity, the reference can be set to null, or the record containing the reference can be deleted – a ‘cascaded delete’.

For more information, please visit http://www.enea.com/polyhedra / or contact:

About Enea
Enea is a global vendor of Linux and Real-time operating system solutions including middleware, tools, protocols and services. The company is a world leader in developing software platforms for communication-driven products in multiple verticals, with extreme demands on high-availability and performance. Enea’s expertise in operating systems and high availability middleware shortens development cycles, brings down product costs and increases system reliability. The company’s vertical solutions cover telecom handsets and infrastructure, medtech, automotive and mil/aero. Enea has offices in Europe, North America and Asia, and is listed on NASDAQ OMX Nordic Exchange Stockholm AB. For more information please visit enea.com or contact us at info@enea.com.

Enea®, Enea OSE®, Netbricks®, Polyhedra® and Zealcore® are registered trademarks of Enea AB and its subsidiaries. Enea OSE®ck, Enea OSE® Epsilon, Enea® Element, Enea® Optima, Enea® Optima Log Analyzer, Enea® Black Box Recorder, Enea® LINX, Enea® Accelerator, Polyhedra® Lite, Enea® dSPEED Platform, Enea® System Manager and Embedded for Leaders(TM) are unregistered trademarks of Enea AB or its subsidiaries. Any other company, product or service names mentioned above are the registered or unregistered trademarks of their respective owner. © Enea AB 2013.

Enea Adds Fine-Grain Locking and Cascaded Deletes to the World's Best Relational In-Memory Database Server