DATABASE SYSTEM, COMPUTER EXECUTABLE METHOD AND PROGRAM FOR DATABASE SYSTEM, AND METHOD FOR UPDATING INDEXING TABLE IN DATABASE SYSTEM

摘要

PPROBLEM TO BE SOLVED: To provide a database system, a computer executable method, a computer executable program for the database system, and a method for updating an index tables in a database system. PSOLUTION: The database system stores item tables of items appended by timestamps. Each of items is further categorized by timestamp into the tables, and the item tables are indexed by index data. The database system further comprises an index table for the index data, listing the earliest timestamp of the item table together with the index data and a system manager for searching the item tables using the index table. PCOPYRIGHT: (C)2006,JPO&NCIPI