Creation of db trigger with error ..

Question

Hello All,
I am creating a trigger as shown .. but getting the following error ..
ORA-01748: only simple column names allowed here
I have a specific requirement as stated below for which i have written a trigger so when user manipulates the column p, q values in table b the corrresponding columns in table a ( x ) should be updated accordingly. I assume it should be after update on table b
a - b
x p+q
if the user updates either column p or q from table b , the trigger should fire and update the column x from table a.
i have written the trigger for this as after update on table b - is am writing a correct trigger ? that accomplishes the task ? can a create a trigger on more than one column too?
if the triggger is on more than one column , will the trigger fire for each column or for all the columns only ?
CREATE OR REPLACE TRIGGER fmlylevel_variables_trg AFTER UPDATE OF P3I2009Q2_FCI_LALA.MINC ON
SALARYX
REFERENCING OLD AS OLD NEW AS NEW
FOR EACH ROW
BEGIN
CALL PKG_FCI_APP.update_fmly_income_variables;
-- this procedure updates the columns of table a taking columns of table b
DBMS_OUTPUT.PUT_LINE('TRIGGER FIRED UPON THE UPDATION OF THE COLUMNS ');
END ;
Can any one suggest what is the issue .. i check in google but not clear.
Edited by: kumar73 on Aug 25, 2010 10:50 AM
Edited by: kumar73 on Aug 25, 2010 10:58 AM
Edited by: kumar73 on Aug 25, 2010 11:15 AM

Answer 1

Hello All,
here is the total things in place .
If the user is updating any of the FCI_MINC columns given in brackets , the data base trigger should fire and update the FCI_FINC tables columns as specified. All the columns SALARYX, SALARYBX etc are from the user interface. the user can change any column value ...
FSALARYX (FCI_FINC) = sum(SALARYX + SALARYBX) FCI_MINC
FNONFRMX (FCI_FINC) = sum (NONFARMX + NONFRMBX) FCI_MINC
FFRMINCX (FCI_FINC) = sum (FARMINCX + FRMINCBX) FCI_MINC
FRRETIRX (FCI_FINC) = sum (RRRETIRX + RRRETRBX + SOCCRX) FCI_MINC
FINDRETX (FCI_FINC) = sum (INDRETX) FCI_MINC
FJSSDEDX (FCI_FINC) = sum (JSSDEDX) FCI_MINC
FSSIX (FCI_FINC) = sum (SSIX + SSIBX) FCI_MINC
HERE IS THE PROCEDURE.
================
create or replace
PACKAGE BODY PKG_FCI_APP AS
function chk_notnull_blank ( colname IN number ) return number is
BEGIN
if ( colname is NOT NULL and colname not in ( -8E14, -7E14, -6E14, -5E14, -4E14, -3E14, -2E14, -1E14, -1E9 )) then
RETURN colname ;
else
RETURN 0;
end if;
END chk_notnull_blank;
procedure update_fmly_income_variables is
cursor c1 is select FAMID, SALARYX, SALARYBX, NONFARMX, NONFRMBX, FARMINCX, FRMINCBX, RRRETIRX, RRRETRBX, SOCRRX, INDRETX, JSSDEDX, SSIX, SSIBX from FCI_MINC ;
cursor c2 is select FAMID, FSALARYX, FNONFRMX, FFRMINCX, FRRETIRX, FINDRETX, FJSSDEDX, FSSIX from FCI_FINC ;
v_flag_boolean boolean := false;
v_famid number := 0 ;
v_temp_sum_fsalaryx number := 0;
v_temp_sum_fnonfrmx number := 0;
v_temp_sum_ffrmincx number := 0;
v_temp_sum_frretirx number := 0;
v_temp_sum_findretx number := 0;
v_temp_sum_fjssdedx number := 0;
v_temp_sum_fssix number := 0;
BEGIN
for i in c2 loop
for j in c1 loop
if ( i.famid = j.famid ) then
v_flag_boolean := true;
v_famid := j.famid;
v_temp_sum_fsalaryx := v_temp_sum_fsalaryx + chk_notnull_blank (j.SALARYX) + chk_notnull_blank (j.SALARYBX);
v_temp_sum_fnonfrmx := v_temp_sum_fnonfrmx + chk_notnull_blank(j.NONFARMX)+ chk_notnull_blank (j.NONFRMBX);
v_temp_sum_ffrmincx := v_temp_sum_ffrmincx + chk_notnull_blank(j.FARMINCX) + chk_notnull_blank(j.FRMINCBX);
v_temp_sum_frretirx := v_temp_sum_frretirx + chk_notnull_blank (j.RRRETIRX) + chk_notnull_blank(j.RRRETRBX) + chk_notnull_blank(j.SOCRRX);
v_temp_sum_findretx := v_temp_sum_findretx + chk_notnull_blank(j.INDRETX);
v_temp_sum_fjssdedx := v_temp_sum_fjssdedx + chk_notnull_blank(j.JSSDEDX);
v_temp_sum_fssix := v_temp_sum_fssix + chk_notnull_blank(j.SSIX) + chk_notnull_blank(j.SSIBX);
end if ;
end loop ;
update FCI_FINC set fsalaryx = v_temp_sum_fsalaryx WHERE famid = v_famid ;
update FCI_FINC set fnonfrmx = v_temp_sum_fnonfrmx WHERE famid = v_famid ;
update FCI_FINC set ffrmincx = v_temp_sum_ffrmincx WHERE famid = v_famid ;
update FCI_FINC set frretirx = v_temp_sum_frretirx WHERE famid = v_famid ;
update FCI_FINC set findretx = v_temp_sum_findretx WHERE famid = v_famid ;
update FCI_FINC set fjssdedx = v_temp_sum_fjssdedx WHERE famid = v_famid ;
update FCI_FINC set fssix = v_temp_sum_fssix WHERE famid = v_famid ;
v_temp_sum_fsalaryx := 0;
v_temp_sum_fnonfrmx := 0;
v_temp_sum_ffrmincx := 0;
v_temp_sum_frretirx := 0;
v_temp_sum_findretx := 0;
v_temp_sum_fjssdedx := 0;
v_temp_sum_fssix := 0;
end loop;
EXCEPTION
when others then
raise_application_error(-20006,' An error was encountered - '||SQLCODE||' -ERROR- '||SQLERRM);
v_err_code := SQLCODE;
v_err_msg := substr(SQLERRM, 1, 200);
INSERT INTO audit_table (error_number, error_message) VALUES (v_err_code, v_err_msg);
end update_fmly_income_variables ;
END PKG_FCI_APP ;
here is the trigger :-
============
CREATE OR REPLACE TRIGGER fmlylevel_variables_trg AFTER UPDATE OF SALARYX, SALARYBX, NONFARMX, NONFRMBX, FARMINCX, FRMINCBX, RRRETIRX, RRRETRBX, SOCRRX, INDRETX, JSSDEDX, SSIX, SSIBX
ON FCI_MINC
FOR EACH ROW
BEGIN
PKG_FCI_APP.update_fmly_income_variables;
DBMS_OUTPUT.PUT_LINE('TRIGGER FIRED UPON THE UPDATION OF THE COLUMNS ');
END ;
Here is the error :-
============
ORA-20006: An error was encountered - -4091 -ERROR- ORA-04091: table .FCI_MINC is mutating, trigger/function may not see it
Let me know if you need any informatoin.
thanks/kumar
Edited by: kumar73 on Aug 25, 2010 1:56 PM
Edited by: kumar73 on Aug 25, 2010 2:02 PM