Database lock control method

摘要

In a database management system for concurrently executing a plurality of transactions for access to a database, there is provided a user interface for defining a parent/child relationship between a plurality of pieces of data. The parent information of data is added to the data itself and to a storage location information of the data in the database. Upon access to data, lock control is performed by use of the parent information of the data, thereby performing representation of locked a object.