The following COBOL examples are appropriate for a single-task batch process where the program has exclusive control of the table. In an online process where several users may be updating different rows in the same table, RK commands should replace the RC commands.
Note:
If multiple users could be updating a table—whether online, in a Read/Write VTS-TSR or other multi-tasking environment—be aware that a LOCK-LATCH password can be used to ensure exclusive access to a table.