| After triggers [message #2994] |
Wed, 28 August 2002 11:05  |
Gaurang
Messages: 4
Registered: August 2002
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Junior Member |
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consider the following example:
create trigger update_qty
after /*insert or delete or update operations
will take place before the trigger is
is fired */
insert or update of qty or delete on items
for each row
begin
if inserting then
update parts
set onhand_qty := onhand_qty - :new.qty
where id = :new.part_id;
elsif ........
.............
..............
......
end;
/* i would like to terminate insert or delete or update transactions if some condition evaluates to false in Begin ..... End block [[trigger action body]]
i.e. there should be no updates on the table */
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| Re: After triggers [message #2998 is a reply to message #2994] |
Wed, 28 August 2002 13:17  |
Todd Barry
Messages: 4819
Registered: August 2001
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Senior Member |
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To abort the DML, just raise an error:
if not some_condition then
raise_application_error(-20000, 'Invalid item transaction');
end if; |
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