| 摘要 |
PURPOSE:To reduce the load of a computer by putting an index to changed system data when the system data are fetched, providing a record wherein an arithmetic expression with the system data as arithmetic elements is stored with a processing request flag and processing only the operation expression indicated by the processing request flag. CONSTITUTION:When a change in data is detected, the changed data are stored in a system data file 1-2. Since a processing file index 1-2a stored in a record is (i), the processing request flag 1-4a of the i'th record of a processing file 1-4 is set. Then, whether the processing request flag 1-4a of the processing file 1-4 is set is checked and, if set, a calculation is performed according to a calculating expression specified in the processing file 1-4, a result being stored in an arithmetic data file 5-5. Thereafter, the processing request flag 1-4a wherein a compute processing is finished is reset. |
