专利名称：Relational database management system发明人：Chang, David Yu,Malkemus, Tim R.申请号：EP94304630.0申请日：19940624公开号：EP0633538A2公开日：19950111
专利附图：
摘要：A relational database management system 10 has a runtime supervisor 22 and adata manager 30. Typically user application files do not conform to the definition of abase relation of the relational database management system. Therefore, for the use ofthe data manager a plurality of library procedures generalized for manipulation of user
application files are provided installed with the database management system.Responsive to user selection, a class for user application files is defined by namingmembers of a set of the library procedures for use with member application files of theclass and by naming the class. Further responsive to user selection, column definitions onan application file within the class are made to create a user defined table 28. The userdefined table corresponds to a specified user application file and to the definition. A classcontrol block 26 is created in which the members of the set of library procedures arenamed for the class and a user defined table control block 28 is created in which thecolumn definitions are stored. Both control blocks are accessible to the runtimesupervisor for use with an access plan generated from SQL statements. Special
structured query language statements are provided for user invocation to define a classof user application files and for providing column definitions, as well as for deleting aclass control block and a user defined table control block.
申请人：International Business Machines Corporation
地址：Old Orchard Road Armonk, N.Y. 10504 US
国籍：US
代理机构：Davies, Simon Robert
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