Abstract: A method of processing an expression includes encoding an expression in source code of an object-relational application, the expression having at least one property of a class. The source code is then compiled to provide run time code, wherein compiling of the expression produces a form of the expression having the intent of the expression by maintaining all operators and operands of the expression.

Abstract: Join expressions, expressed in terms of objects, are translated into a relational database join statement by generating a parse tree based on the join expression. The parse tree is traversed to build the relational database join statement.

Abstract: The present invention is a method and system for querying a database system. An object query identifies a partial set of properties of an object to be returned. A portion of the relational database containing those properties is identified and only those properties are returned.

Abstract: A map provider and a data location provider provide information as to how the data pertaining to entities is stored in a database system and where the data is stored in the database system. A data accessing system uses the information to process requests to perform an operation on the data.

Abstract: A method and system for storing and retrieving data in a database system includes associating a plurality of entities in a child/parent hierarchy. The entities are further grouped in types of similar properties, wherein each entity has a unique identifiable position within the child/parent space. References are made to types and properties of the entities in order to store and retrieve associated data about the entity, where the types and properties are mapped to tables of the database.

Abstract: Join expressions, expressed in terms of objects, are translated into a relational database join statement by generating a parse tree based on the join expression. The parse tree is traversed to build the relational database join statement.