Slide 16.5: Quadrant 3: complex data without queries (cont.)

A DBMS Classification Matrix (Cont.)

	Simple Data	Complex Data
Query	2. Relational DBMS	4. Object-Relational DBMS
No Query	1. File System	3. Persistent Language

Quadrant 3: Complex Data without Queries (Cont.)

J = J + 1 (cont.)

The architecture below allows a security system to be implemented in the right-hand module.

A portion of the DBMS, along with a substantial cache of DBMS data, resides in the client program‘.s address space. The rest of the DBMS deals with long-term data storage.

A relational DBMS does not have the above problem ⇒ SQL tolerates slow updates, and an address space crossing entailed by the client-server architecture is a less severe problem.

Finally, two comments are drawn from the above discussions:

Systems that focus on providing tight integration with a programming language and high performance for updates to persistent variables are known as object-oriented DBMSs. For example, ObjectStore & C and C++, GemStone & Smalltalk, and O₂ & extension of C and Lisp.

If you have an application in the lower-right quadrant, choose a vendor of a persistent language for your chosen programming language.