Novel techniques for operating a transactional processing system on which a CICS progran is stored. The CICS program includes logic for implementing business rules, and logic for accessing data. An ODBC invocation proven, stored on a client data processing system, is adapted to invoke stored procedures. The invocation program, executed by a remote computer, causes execution of the stored CICS program at the transactional processing system. The invocation program causes the CICS program to access data from a computer-readable data storage medium, and to filter the data by implementing business rules. The transactional processing system is equipped with business rules. The trnnsactional processing system is equipped with stored procedures (queries), executed in response to a query command stored in the invocation program and issued by the client data processing system. Thus, the result of the query include accessed data to which business rules have been applied. The results can be processed by stored client programs.