This inventor holds 6 USPTO granted patents. Top assignees: Hitachi, Ltd., Hitachi Software Engineering Company, Ltd.. Active years: 1985-1994.
Location History:
- Yokohama, JP (1985)
- Kawasaki, JP (1990 - 1994)
Company Filing History:
6 out of 42,726 
2 out of 228 
Years Active: 1985-1994
Title: Kazuhiko Ohmachi: Innovator in Database Processing Technologies
Introduction
Kazuhiko Ohmachi is a notable inventor based in Kawasaki, Japan. He has made significant contributions to the field of database processing, holding a total of 6 patents. His work focuses on optimizing query processing and improving data handling efficiency.
Latest Patents
One of his latest patents is a method and apparatus for determining prefetch operating for a database. This invention involves a central processing unit that analyzes multiple queries from users to determine an internal processing procedure for a database. It also includes a secondary storage system for shared data and an input/output controlling processing unit with cache storage. The method innovatively decides whether to perform a prefetching operation at the start of input/output processing, optimizing the retrieval range and prefetching record number based on access characteristics and system performance.
Another significant patent is a system for optimizing query processing in a relational database. This method analyzes user queries to determine the best internal processing procedure. It prepares multiple procedures based on query analysis and statistical information, selecting the most efficient one for execution. This innovation enhances the overall performance of database systems.
Career Highlights
Kazuhiko Ohmachi has worked with prominent companies such as Hitachi, Ltd. and Hitachi Software Engineering Company, Ltd. His experience in these organizations has allowed him to develop and refine his innovative ideas in database technology.
Collaborations
Throughout his career, Ohmachi has collaborated with talented individuals, including Masashi Tsuchida and Hiroyuki Kitajima. These partnerships have contributed to the advancement of his inventions and the overall field of database processing.
Conclusion
Kazuhiko Ohmachi's contributions to database processing technologies have made a significant impact on the industry. His innovative patents demonstrate his expertise and commitment to improving data handling and query optimization.