Oracle DB Security Redaction: enable redaction on column

oracle-db-redaction-enable.sql

BEGIN
    DBMS_REDACT.ADD_POLICY(
                          OBJECT_SCHEMA        => 'APP',
                          OBJECT_NAME          => 'USERS',
                          COLUMN_NAME          => 'CARD_NUMBER',
                          POLICY_NAME          => 'mask_user_card_nums',
                          FUNCTION_TYPE        => DBMS_REDACT.PARTIAL,
                          FUNCTION_PARAMETERS  => DBMS_REDACT.REDACT_CCN16_F12,
                          EXPRESSION           => '1=1'
    );
END;