Why is the trigger triggering on all fields in a table?

Question

I have a trigger and the text is as follows. The trigger should just write the emplid to the table PS_DM_ADDR_CHG_EMP whenever there is an update to the fields
STREET1,STREET2 ,STREET3 ,CITY ,STATE ,ZIP ,COUNTRY in PS_PERSONAL_DATA. But some how it is writing emplid to the PS_DM_ADDR_CHG_EMP when any updateis done on any field on the 50 plus fields of the PS_PERSONAL_DATA table. Is there any reason why this happens. I looked at all other triggers and none of them writes any thing to this table though I found one more trigger on PS_PERSONAL_DATA for any insert or update or delete on any field and it uses insert in some other table. I did not see any other triggers related to the PS_PERSONAL_DATA table. So how to diagonize the issue of finding what is causing to write the data to this custom table.
CREATE OR REPLACE TRIGGER HT0P.PERSDATA_RAU
AFTER UPDATE OF STREET1,STREET2 ,STREET3 ,CITY ,STATE ,ZIP ,COUNTRY
ON PS_PERSONAL_DATA
REFERENCING NEW AS NEW OLD AS OLD
FOR EACH ROW
DECLARE
v_Emplid ps_personal_data.emplid%type; -- Used for storing EMPLID
BEGIN
v_Emplid := :old.emplid;
UPDATE ps_dm_addr_chg_emp a
SET a.emplid = v_Emplid
WHERE (((a.emplid = v_Emplid) and length(v_emplid) = 3)
or ((substr(a.emplid, 1, 3) = substr(v_Emplid, 1, 3)) and length(v_emplid) = 4 and substr(v_emplid, -1, 1) in('B', 'C', 'J', 'K', 'P', 'U'))
or ((a.emplid = v_Emplid) and length(v_emplid) = 4)
or ((substr(a.emplid, 1, 4) = substr(v_Emplid, 1, 4)) and length(v_emplid) = 5 and substr(v_emplid, -1, 1) in('B', 'C', 'J', 'K', 'P', 'U'))
or ((a.emplid = v_Emplid) and length(v_emplid) = 5)
or ((substr(a.emplid, 1, 5) = substr(v_Emplid, 1, 5)) and length(v_emplid) = 6 and substr(v_emplid, -1, 1) in('B', 'C', 'J', 'K', 'P', 'U'))
or ((a.emplid = v_Emplid) and length(v_emplid) = 6)
or ((substr(a.emplid, 1, 6) = substr(v_Emplid, 1, 6)) and length(v_emplid) = 7 and substr(v_emplid, -1, 1) in('B', 'C', 'J', 'K', 'P', 'U')));
IF SQL%NOTFOUND THEN
INSERT INTO ps_dm_addr_chg_emp (emplid)
VALUES (v_Emplid);
END IF;
END;

Answer 1

Hi,
It would be helpful if you could post formated code using tags. Learn more from FAQ
To test your trigger - You may want to create a temparory table and have an insert statement for the temp table in your trigger and test it by updating other columns of your main table.
Also you may want to ensure it is not the UPDATE statement which is causing the trouble for you by updating some unintended rows...
Regards,
Rakesh