Toad World® Forums

Trigger Debug


#1

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acip.vcf (298 Bytes)

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#2

Oracle cursors handle before and after snapshot with .before or .after snapshot
of the the state of the requested cursor …more info is available at
http://download.oracle.com/docs/cd/B10501_01/appdev.920/a96624/06_ora.htm#36656

//if you want a sql statement to be executed before a dml event use BEFORE DML
as in
CREATE OR REPLACE TRIGGER bb_deptchg_trg
BEFORE UPDATE OF idDepartment ON bb_department
FOR EACH ROW
BEGIN
UPDATE BB_PRODUCT
SET idDepartment = :NEW.idDepartment
WHERE idDepartment = :OLD.idDepartment;
END;
/

//conversely if you wish to execute a DML operation which will occur after a DML
event use the AFTER DML
CREATE or REPLACE Trigger product_inventory_trg
AFTER UPDATE OF orderplaced on proxy_user.BB_BASKET
FOR EACH ROW
WHEN (OLD.orderplaced <> 1 AND NEW.orderplaced = 1) --OLD is previous record
read …NEW is New record read
DECLARE
CURSOR basketitem_cur IS
SELECT idproduct,quantity,option1 FROM proxy_user.BB_BASKETITEM
WHERE idbasket = NEW.idbasket;
lv_chg_num NUMBER(3,1);
END product_inventory_trig;
/

hth
Martin Gainty


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#3

Morning Aci,

Is there a way to see OLD.xx and NEW.xx values of the table
in trigger debug session??
There is, if you don’t mind a little extra coding. Oracle’s debugger is
the cause of the problem I’m afraid and Toad hooks into it. If Oracle
can’t tell Toad the value, Toad can’t display it for you.

You need to declare a couple of variable and in your code, do:

...
declare
	vOldSomething tablename.columnname%type;
	vNewSomething tablename.columnname%type;
	...
begin
	...
	vOldSomething := :old.something;
	vNewSomething := :new.something;
	...
end;

And so on. Now you should be able to hover or watch these temporary
variables. When done debugging, comment out the various bits to save a
few microseconds of CPU when the system goes live.

HTH

Cheers,
Norm. [TeamT]

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We may have to make this message and any reply to it public if asked to under the Freedom of Information Act, Data Protection Act or for litigation. Email messages and attachments sent to or from any Environment Agency address may also be accessed by someone other than the sender or recipient, for business purposes.

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#4

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acip.vcf (298 Bytes)


#5

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