专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

2. 发明专利

JP2748407B2 失效
公开(公告)号：JP2748407B2
公开(公告)日：1998-05-06
申请号：JP14087888
申请日：1988-06-08
申请人： HITACHI SEISAKUSHO KK
发明人： IIZUKA TETSUO , AKIBA TOSHIO , IWASAKI MASAAKI , TAKAMOTO YOSHIFUMI
IPC分类号： G06F17/30 , G06F12/00
摘要： PURPOSE:To eliminate a competition in a data base resource by retrieval processing and update processing and to execute the retrieval processing at a high speed by processing a retrieval request, for which the up-to-dateness of data is unnecessary, using a retrieval system data base. CONSTITUTION:In a DB system (1)40, an update request is processed by accessing an update system DB (A)60, and the update information is stored in update data hysteresis information 70. In a DB system (2)50, only a reference request is accessed using a retrieval system DB (B)80 and processed. The DB (B)80 is the DB to execute a copy at a certain point in the DB (A)60. A user designates an access language according to the aim of the processing, and a language analyzing part 10 analyzes the access language and gives the analyzed access language to a managing part 20. The managing part 20 executes aimed DB processing by determing a DB system to execute the processing based on analysis information and requesting the determined DB system to execute the processing. When the analysis information is the request which never requests the up-to-dateness, a managing part 30 manages loaded status and determines a system having a low load.

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