The following code uses PLSQL_CCFLAGS to assign a value to the user-defined inquiry directive $$Some_Flag and to itself.
SQL> SQL> ALTER SESSION SET-- w ww. ja va 2 s. c o m 2 PLSQL_CCFlags = 'Some_Flag:1, Some_Flag:2, PLSQL_CCFlags:0' 3 / Session altered. SQL> BEGIN 2 DBMS_OUTPUT.PUT_LINE($$Some_Flag); 3 DBMS_OUTPUT.PUT_LINE($$PLSQL_CCFlags); 4 END; 5 / 2 0 PL/SQL procedure successfully completed. SQL>