The COMMIT Statement
The COMMIT statement releases all record locks in all files held by this
run unit. For COBOL systems that support the WITH...ROLLBACK clause of the
SELECT statement as other than documentary, COMMIT indicates the end of the
current transaction and makes the effects of that transaction permanent.
General Format

General Rules
- Execution of the COMMIT statement causes all record locks in all files held
by the run unit to be released.
- The file lock on an exclusive file is not affected by the COMMIT statement.
- If your COBOL system supports the WITH ... ROLLBACK clause of the SELECT
statement as other than documentary, then the COMMIT verb:
- Indicates completion of the current transaction
- Makes all changes applied during the transaction permanent.