MANAGEMENT OF LOB'S IN EDB

摘要

This paper detailedly discusses management of graphics in engineering database (EDB) aimed at vehicle engine. Client/server architecture is adopted in the system. The reference development and application platform is assumed to be the Microsoft Visual Studio development system version 6.0, the Microsoft Windows NT operating system version 4(Service Pack 4), Oracle 8i as background data management, I-DEAS version 8 as CAD design software. Communication of 3D graphics information among subsystem users is achieved by ways of Virtual Reality Modeling Language (VRML). We study a mechanism that converts model data to VRML file. 3D graphics adopted VRML file are stored in Oracle database (global database) in terms of BLOB datatype. The implement of system has extended and applicable value to solve management problem of large data associated with graphics in project and of graphic data file (LOB) for I-DEAS.