David Edward DeHaan

Title: Innovations of David Edward DeHaan

Introduction

David Edward DeHaan is a notable inventor based in Waterloo, Canada. He holds five patents that showcase his expertise in database systems and methods. His work has significantly contributed to advancements in data management and processing.

Latest Patents

One of his latest patents is titled "Index-based, adaptive join size estimation." This patent describes systems, methods, and computer media for estimating join sizes in database operations. The process involves applying a filter to a table, sampling the output, and accessing an index for a second table to retrieve matching record counts. This method allows for efficient and accurate estimation of data sizes for join operations, with statistical confidence assessed through variance-based calculations.

Another significant patent is "Multiple RID spaces in a delta-store-based database to support long running transactions." This invention introduces a delta store that provides row-level versioning semantics to a non-row-level versioning underlying store. It establishes a column-based in-memory database that includes a main store and a delta store, allowing for concurrent transactions on the same table through a row-level versioning mechanism.

Career Highlights

David has worked with prominent companies such as Sybase, Inc. and SAP SE. His experience in these organizations has allowed him to develop and refine his innovative ideas in database technology.

Collaborations

Throughout his career, David has collaborated with talented individuals, including Mihnea Andrei and Anil Kumar Goel. These partnerships have contributed to the success of his projects and patents.

Conclusion

David Edward DeHaan's contributions to the field of database systems through his patents reflect his innovative spirit and technical expertise. His work continues to influence advancements in data management and processing.