Patent ID: 6925462
Filing Date: 2005-08-02
Classification: G06F,Y10S

Abstract:
1. A database management system having the function of accessing one or more external databases, comprising: a means for specifying whether functions in a query sent from a user are executed in external databases; and a means for determining whether data referred to in said query sent from the user can be processed by access to one external database, wherein, when it is determined that all functions referred to in said query can be processed by access to said one external database and the user specifies execution in said one external database, said query is processed in said one external database, and when it is determined that all functions referred to in said query cannot be processed by access to said one external database, then after ones of said functions contained in said query specified to be executed in said one external database are executed, others of said functions in said query not executable in said one external database are executed in an internal database after getting an executed result into said internal database from said one external database.