EXCLUSION CONTROLLING METHOD BETWEEN PLURALITY OF OPERATIONS

摘要

PROBLEM TO BE SOLVED: To prevent an overlapped update of database and to guarantee the consistency by making an exclusion range in database update to be irreducible minimum. SOLUTION: A terminal 2a first makes a table 3 being in a registration state for key information 11 and 12 composed of keys A and B and date and hour without exclusion by an operator's operation 101 in the case of performing DB update of the keys A and B (201 to 207) and temporarily stores the key information registered in the table 3 (209). Exclusion is applied, and the key information 11 and 12 of the table 3 is collated with the temporarily stored key information (210 to 212). In the case of coincidence of all of the key information, data are updated with respect to the keys A and B, considering the key information 11 and 12 as not being used or interrupted by other terminals (214). When the data update is finished, the key information 11 and 12 of the table 3 is eliminated and the exclusion is released. The other terminals can perform DB update until exclusion is applied.