Invention Grant
- Patent Title: Database management system and database management method
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Application No.: US16576947Application Date: 2019-09-20
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Publication No.: US11494383B2Publication Date: 2022-11-08
- Inventor: Akira Shimizu , Kouji Kimura , Kazuhiko Mogi , Masaru Kitsuregawa , Kazuo Goda , Yuto Hayamizu
- Applicant: Hitachi, Ltd. , The University of Tokyo
- Applicant Address: JP Tokyo; JP Tokyo
- Assignee: Hitachi, Ltd.,The University of Tokyo
- Current Assignee: Hitachi, Ltd.,The University of Tokyo
- Current Assignee Address: JP Tokyo; JP Tokyo
- Agency: Mattingly & Malur, PC
- Priority: JPJP2019-025453 20190215
- Main IPC: G06F16/2455
- IPC: G06F16/2455 ; G06F16/28 ; G06F16/2453

Abstract:
When a DBMS receives a suspend instruction in which a suspend completion time of query processing is a future time and between receipt of the suspend instruction and the suspend completion time, if there is a target object (at least a processing object whose execution is in progress upon receipt of the suspend instruction) whose predicted completion time is at or precedes the suspend completion time, the DBMS changes the state of the target object to a state signifying a snapshot suspend. If there is a processing object whose state signifies a snapshot suspend, the DBMS executes the processing object at or before the suspend completion time.
Public/Granted literature
- US20200265050A1 DATABASE MANAGEMENT SYSTEM AND DATABASE MANAGEMENT METHOD Public/Granted day:2020-08-20
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