System trigger error

Question

Hi Guys,
I have created system trigger as follows
ONLOGON
declare
s_date number(2);
p_count number(10);
BEGIN
select to_char(sysdate,'DD') into s_date from dual;
if s_date in (1,7,14,21,28) then
select count(*) into p_count from t_bug;
if p_count >20000 then
--delete t_bug;
--delete t_err_audits;
execute immediate 'truncate table t_bug';
execute immediate 'truncate table t_err_audits';
end if;
end if;
COMMIT;
END;
While logon on date 21-AUG-09 system hangs and giving errors
*** SESSION ID:(38.44) 2009-08-21 14:51:36.234
Skipped error 604 during the execution of JBP_WEST.ON_LOGON_DELETE
*** 2009-08-21 14:51:36.343
ksedmp: internal or fatal error
ORA-00604: error occurred at recursive SQL level 1
ORA-30511: invalid DDL operation in system triggers
ORA-06512: at line 11
What is wrong here. Guide me to correct the problem.
Arvind2
Edited by: Arvind2 on Aug 21, 2009 3:19 AM

Answer 1

Arvind2
Apparently you didn't look up the error message
ORA-30511: invalid DDL operation in system triggers
In the online documentation.
Most people posting here sadly refuse to look up any error message.
Please tell me, when you look at your own code, what part of this error message you don't understand?
It is quite self-explanatory!!!!
'Kindly do the needful' and don't ask for clarification of the obvious.
There is also no reason why you couldn't run this as an independent PL/SQL job.
Sybrand Bakker
Senior Oracle DBA