However, after i create the index. It's not picking the original plan which i put it in baseline. It's using range scan.oracle optimizer choosing the new plan as it think new plan is best as compare to existing full table scan plan.
to get the actual execution plan of the last executed statement in that session
SELECT * FROM TABLE(DBMS_XPLAN.DISPLAY_CURSOR(NULL,NULL,'ALLSTATS LAST'));
alter session set events 'trace[RDBMS.SQL_Plan_Management.*]';