| 摘要 |
PURPOSE:To improve the efficiency of program development by realizing the sharing/exclusive control of a file in a simple data base language to perform automatically plural simultaneous processings in the data base language while keeping the easiness for program development in the data base language. CONSTITUTION:If the name of the file is written with lower case letters when the use of the file is declared, the file is handled as a read-only file; but if the name of the file is written with uppercase lettes then, the file is handled as a read/write file. If it is a read-only file, the file can be shared in a step 17, but otherwise, it is controlled exclusively in a step 18. If the name of the file is not written with lowercase letters neither uppercase letters, error is reported in a step 16. |
