I am having an issue with a trigger. After I add the trigger to my database, when I try to insert a row that the trigger will act on, I get a mutating table error. I don't know how to avoid this. Would someone mind looking at this and tell me what I am doing wrong, and how to rewrite it?
CREATE OR REPLACE TRIGGER ORNG_INV_LINE_TOTAL_TRIGGER
FOR INSERT OR UPDATE ON ORNG_INV_LINE
COMPOUND TRIGGER
AFTER EACH ROW IS
BEGIN
UPDATE ORNG_INVOICE SET Inv_Amount = (SELECT SUM(ORNG_INV_LINE.Inv_Line_Total)
FROM ORNG_INV_LINE
WHERE ORNG_INVOICE.INV_Num = :NEW.INV_Num);
END AFTER EACH ROW;
END ORNG_INV_LINE_TOTAL_TRIGGER;
/
I'm not sure why it is triggering an error. I'm trying to do the action after the update. All I want to do is get the sum for all of the lines of all matching invoice numbers, and write that value in the INVOICE table. Thanks for the help.
Your trigger is written on the table ORNG_INV_LINE for insert or update and again you made a select on the same table while updating ORNG_INVOICE table so trigger is mutating,
to over come this you have to use statement level trigger instead of row level trigger .
i.e after each statement should be there in code instead of after each row.
This can help you.
Here is the solution...apparently everyone is busy with Thanksgiving. Hopefully this helps the next guy.
create or replace TRIGGER ORNG_INV_L_TTL_TRIG
AFTER INSERT OR UPDATE OR DELETE ON ORNG_INV_LINE
BEGIN
UPDATE ORNG_INVOICE SET Inv_Amount = (SELECT SUM(Inv_Line_Total)
FROM ORNG_INV_LINE
WHERE INV_Num = ORNG_INVOICE.INV_Num);
END ORNG_INV_L_TTL_TRIG;
/
Related
I want to create an update trigger for a table. The trigger was created, but when I update the column finish, it say mutating table.
This is my code
CREATE OR REPLACE TRIGGER SET_COST BEFORE UPDATE OF finish ON PAY
FOR EACH ROW
BEGIN
UPDATE PAY
SET PAY.COST = (finish-start) * 20000
WHERE PAY.ID=:new.ID;
END;
This trigger gives me 'Mutating Table' error and so far I have been unable to fix it. Any Suggestion ? Thanks
First of all, you shouldn't be doing that at all. There's no use in storing values that are easily calculated whenever you need them.
As of your question: no UPDATE:
begin
:new.cost := (:new.finish - :new.start) * 20000;
end;
I am writing some PL/SQL code for a apex database application. With the code a want to realise that when I make a purchase order, a purchase orderline is automatically generated based on the purchase order_id. However, I'm getting a ORA-04071 error running the code below:
create or replace trigger "INKOOPORDER_T1"/
AFTER insert or update or delete on INKOOPORDER
for each row begin
INSERT INTO INKOOPORDERREGEL
(I_nummer)
SELECT
I_nummer
FROM inkooporderregel
go
end/
Can somebody help me please?
ur query has some syntax errors
try below code
I removed / from first line and after End, put ; at the end of insert statement and deleted go.Also after end a ;
create or replace trigger "INKOOPORDER_T1"
AFTER insert or update or delete on INKOOPORDER
for each row
begin
INSERT INTO INKOOPORDERREGEL
(I_nummer)
SELECT
I_nummer
FROM inkooporderregel;
end;
Unable to execute the trigger, Can anyone explain where i am doing wrong.
CREATE OR REPLACE TRIGGER HK_WS_ED_CT_T1
BEFORE INSERT OR UPDATE OF CI On HK_WS_ED_CT
FOR EACH ROW
BEGIN
IF (:new.CI = CI) THEN
UPDATE HK_WS_ED_CT
SET (TRANS_OTHER, TRANS_OTHER_DESC) =
(SELECT TRANS_OTHER, TRANS_OTHER_DESC
FROM HK_WS_ED_CT
where CI = :NEW.CI and rownum <=1 order by DATE)
end if;
END;
You are updating the table the trigger is on. This is not allowed.
You should put :new.trans_other equal to something and :new.trans_other_desc to something.
The update of the field will be ok then.
If you really want to update all the rows of that same table you should take a look at compound triggers. But I doubt this is what you want.
The main problem in DB triggers is you can't select, insert, update, delete from the table the trigger is firing on. The table is locked at this moment.
I have been bogged in this problem for quite a long time....Can anyone help me out?
Here is the thing I want to implement:
I have a table A, A has attributes: id, count, total. Here I am required to implement such a trigger: IF the count in table A is updated, the trigger will set the total to 1.
My initial code is like this:
CREATE OR REPLACE TRIGGER tri_A AFTER UPDATE OF count ON A
FOR EACH ROW
BEGIN
UPDATE A SET total = 1 WHERE id = :new.id;
END;
/
The problem with this is the mutating table. When the table is updated, the table will be locked. I searched for the answers, I tried pragma autonomous_transaction, but I got an invalid trigger specification error. And there are other comments saying that we should try to use a combination of triggers to do this....I can't figure out how to do this
Assuming id is the primary key, you don't want to UPDATE the table. You just want to set :new.total. You'll also need to do this in a BEFORE UPDATE trigger not an AFTER UPDATE trigger.
CREATE OR REPLACE TRIGGER tri_A
BEFORE UPDATE OF count ON A
FOR EACH ROW
BEGIN
:new.total := 1;
END;
Trying to create an Oracle trigger that runs after a table is updated in any way. I've been googling this all morning and came up with this:
CREATE OR REPLACE TRIGGER gb_qty_change
AFTER UPDATE OR INSERT OR DELETE ON F_ITEM_STORE
FOR EACH ROW
DECLARE
v_qty V_AD_ON_HAND%rowtype;
v_isbn TD_ITEM_DESCRIPTION.TD_IDENTIFIER%type;
BEGIN
delete from gb_transaction where gb_tide = :new.ITST_ITEM_TIDE_CODE;
select TD_IDENTIFIER INTO v_isbn from TD_ITEM_DESCRIPTION where TD_TIDE = :new.ITST_ITEM_TIDE_CODE;
select * INTO v_qty from V_AD_ON_HAND where ITST_ITEM_TIDE_CODE = :new.ITST_ITEM_TIDE_CODE;
insert into gb_transaction(gb_tide, gb_isbn, gb_used_on_hand, gb_new_on_hand)
values(:new.ITST_ITEM_TIDE_CODE, v_isbn, v_qty.USED_ON_HAND, v_qty.NEW_ON_HAND);
END;
/
I'm trying to keep it to a single record per TIDE_CODE in the new table.
V_AD_ON_HAND is a view that pulls an inventory count.
gb_transaction is my new table where I'm logging these events
Comparing it to other peoples code it looks like it should run but I'm getting "Warning: Trigger created with compilation errors."
The problem, I believe is with the :new designations for a delete trigger. There is, after all, no NEW value as the record is expunged. You can only access the :OLD values on delete.
if you section the trigger by operation, you can do this.
CREATE OR REPLACE TRIGGER gb_qty_change
AFTER UPDATE OR INSERT OR DELETE ON F_ITEM_STORE
FOR EACH ROW
DECLARE
v_qty V_AD_ON_HAND%rowtype;
v_isbn TD_ITEM_DESCRIPTION.TD_IDENTIFIER%type;
BEGIN
IF INSERTING or UPDATING then
... insert your existing code
ELSE
... do something similar with the :old values for the deleting case
end if;
END;
/
Incidentally, it is generally helpfull if you tell us WHAT the error is, not just that you had one. If compiling via SQL*Plus script, after the forward slash call to compile the trigger after the "end;" statement, add a line that says:
SHOW ERRORS TRIGGER YOUR_TRIGGER_NAME;