Bull Hn Information Systems, Inc.

William Lawrance

David S Edwards

David A Egolf

Kenneth R Rosensteel, Jr

Howard Hagan

Ken Allen

Bulk data is read or written by an application on a first computer system to a file on a second heterogeneous computer system. Alternatively it is read or written as bulk data directly between applications on these heterogeneous systems. Jobs or tasks are started from one system to execute on a second heterogeneous system. Results are then returned to the first system. Checkpointing and later restarting is also initiated from a first system for execution on the second heterogeneous system.

Method and data processing system providing checkpoint/restart across multiple heterogeneous computer systems

Method and data processing system providing file I/O across multiple heterogeneous computer systems

Method and data processing system providing bulk record memory transfers across multiple heterogeneous computer systems

A system and method that enhances the data access performance of a multi-layer relational database manager by expanding the code generation component layer of the database manager to include a number of performance enhancing subroutines designed to execute functions performed by lower component layers substantially faster than if the functions were executed by such lower component layers. Each such subroutine includes logic for establishing the conditions under which the particular subroutine is invoked during the processing of a SQL request. During process of generating code for a specific SQL query, the code generation component layer inserts calls to the different performance enhancing subroutines in place of normally included calls to lower component layers. This results in the insertion of the different performance enhancing subroutines into the generated code. Such routines enable the dynamically generated code at query execution time to perform lower component layer functions based on the characteristics of the original query statement resulting in increased performance.

Method and system for dynamically generating code to enhance the performance of a relational database manager that provides access to a relational database

A system and method that enhances the row retrieval performance of a multi-layer relational database manager by including in the code generation component layer of the database manager a row retrieval performance enhancing subroutine designed to execute functions performed by a lower component layer substantially faster than if the functions were executed by such lower component layer. The subroutine includes logic for establishing the conditions under which the particular subroutine is invoked during the execution of a SQL request. The output code generated to execute a specific SQL query, including calls to the row retrieval subroutine in place of normally included calls to the lower component layer. This enables the generated code to perform lower component layer functions with specialized code designed to increase performance based on the characteristics of the data being retrieved.

Method and system for using dynamically generated code to perform record management layer functions in a relational database manager

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Phoenix, AZ, United States of America

William Lawrance