Rule Definition
The purpose of a Cobol SQL Cursor should be clearly specified by using the FOR clauses : READ ONLY, FETCH ONLY or UPDATE. When the cursor will only be used to read data, you should always use FOR READ ONLY or FOR FETCH ONLY clauses. This will avoid table locking and allows other SQL statements to read from the same tables. When the cursor will modify data, you should always use FOR UPDATE clause.

Remediation
Check the cursor and if so, add the expected FOR clause.

Violation Code Sample

EXEC SQL
  DECLARE C_EMP CURSOR FOR
    SELECT EMPNO, FIRSTNME, MIDINIT, LASTNAME, SALARY
      FROM DSN8C10.EMP
END-EXEC.

Fixed Code Sample

EXEC SQL
  DECLARE C_EMP CURSOR FOR
    SELECT EMPNO, FIRSTNME, MIDINIT, LASTNAME, SALARY
      FROM DSN8C10.EMP
  FOR READ ONLY
END-EXEC.

IBM DB2 Guidelines for restricting SELECT statements: https://www.ibm.com/support/knowledgecenter/SSEPGG_11.5.0/com.ibm.db2.luw.admin.perf.doc/doc/c0005280.html