Sap Ag

Sun Microsystems, Inc.

Michael Watzek

Stefan Bresch

Markus J Kuefer

Christian Stork

Guenter Zachmann

Craig L Russell

Jochen Mueller

Marina V Vatkina

A method is described that comprises receiving at a first interface a request to lock a row of data from a database table. The method also comprises formatting the request into a format suitable for reception by a second interface. The second interface is an interface to a logical locking function.

Interface to lock a database row through a logical locking interface

A system and method are described for performing a mapping between persistent data objects and a database. For example, a method according to one embodiment of the invention comprises determining whether an attribute having a generic type is an instance of a persistent class; and if the attribute is an instance of a persistent class, then mapping the attribute to a discriminator column holding the type associated with the attribute and further mapping the attribute to a reference column holding a key associated with the attribute.

Object-relational mapping system and method for generic relationships

Logically locking in a Java Data Object rather than in a transactional context of a data store to separate the process of isolating an object from accessing a data store to which the object is mapped.

Logical locking for Java Data Objects

Methods and systems consistent with the present invention provide an improved object-relational mapping tool used to maintain information in relational database tables that do not utilize primary keys. The improved object-relational mapping tool uses a cursor update operation associated with relational database tables to maintain information contained in a relational database table without primary keys, including performing operations such as, delete or update on the table.

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Berlin, Germany

Michael Watzek