NETWORK TYPE DATABASE INQUIRY CONTROL SYSTEM

摘要

PURPOSE: To improve productivity and maintainability of a network type database. ;CONSTITUTION: An external schema information store part 1 stores external schema information for defining a relation between records of a network type database 8 by using a set. An internal schema information store part 2 stores internal schema information for defining a form for storing the network type database 8 in a storage device. An automatic model converting part 3 generates network model information from the external schema information and the internal schema information, and stores it in a network model information storing part 5 of a relational type data base directory part 4. An inquiry executing part 7 determines inquiry control to the network type database 8 from a database inquiry sentence 6 and the network model information, and executes an inquiry to the network type database 8.;COPYRIGHT: (C)1993,JPO&Japio