| 摘要 |
<P>PROBLEM TO BE SOLVED: To quicken data search processing in a distributed database system. <P>SOLUTION: A distributed database management system includes a front server 21 configured to transfer schemer information showing the distribution destination of table data to backend servers 22, 23, and 24, and to, when there exists item data which are not included in a connection key column stored in each of the backend servers 22, 24, and 24, complementarily store the item data as duplicate data in the corresponding backend servers. Each of the backend servers 22, 23 and 24 is configured to, when a search request is transmitted, extract column data for search which becomes necessary with the search content from the connection key column by connecting column data stored so as to be distributed in the backend servers, and to generate an intermediate search result by transmitting search column data for connection to the other servers in which data for connection corresponding to the search column data are distributed. <P>COPYRIGHT: (C)2012,JPO&INPIT |
