1993-05-20
1997-10-21
Black, Thomas G.
395602, 395604, 395611, 395613, 395333, 395339, 395348, 395500, 395793, 395794, G06F 1730
Patent
active
056806140
ABSTRACT:
In a database management system of the present invention, a trigger definition means which defines activation condition an contents of a triggered operation activated upon execution of updating for a table further defines an operation where an exception is generated for an update request against the constraint given to the table, or a triggered operation based on the reference constraint given among a plurality of tables, or a triggered operation based on the relations among the system tables contained in the system directory. The trigger definition means also specifies an operation mode as a condition for execution of the triggered operation. The trigger execution means executes the triggered operation when the trigger operation mode designated by the update request and the operation mode specified in the trigger definition are the same and does not execute any trigger execution when they are not the same.
REFERENCES:
patent: 5197005 (1993-03-01), Shwartz et al.
patent: 5257185 (1993-10-01), Farley et al.
patent: 5295256 (1994-03-01), Bapat
patent: 5317742 (1994-05-01), Bapat
patent: 5339392 (1994-08-01), Risberg et al.
patent: 5414838 (1995-05-01), Kolton et al.
patent: 5421008 (1995-05-01), Banning et al.
patent: 5430872 (1995-07-01), Dahod et al.
patent: 5491783 (1996-02-01), Douglas et al.
Bakuya Takao
Matsui Masato
Black Thomas G.
Lewis Cheryl
NEC Corporation
LandOfFree
Relational database management system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Relational database management system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Relational database management system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1015615