When multiple users attempt to manipulate data in the same table at the same time, the HiRDB system automatically implements locking in order to maintain data integrity. Especially inasmuch as the individual servers in a HiRDB/Parallel Server do not in principle share resources, an independent means of locking is used for each server. Depending on the nature of the operation to be performed, you can modify a lock that is implemented automatically by HiRDB.

Organization of this section

6.10.1 Units of locking

6.10.2 Lock modes

6.10.3 Automatic locking by HiRDB

6.10.4 Changing the lock based on a user setting

6.10.5 Lock period

6.10.6 Deadlock