Limit User Connection Based on Time Interval

As we don't want the database user, which has reporting jobs, to connect the database at working hours, following trigger was used to apply this restriction.

CREATE OR REPLACE TRIGGER SYS.DENY_LOGIN
AFTER LOGON
ON DATABASE
BEGIN
IF sys_context('USERENV', 'SESSION_USER') = 'REPORT_USER' THEN
IF to_char(SYSDATE, 'hh24') BETWEEN 08 AND 22 THEN
raise_application_error(-20001,
'Sorry, it is not permitted to logon to the DB at this time as this user');
END IF;
END IF;
END deny_login;
/