Hi list,
I'm having trouble with - believe me! - the IF operator on a PL/PGSQL
function used by a trigger.
I'm using one unique function to process the three triggers events
(delete, update and insert), but when I reference OLD or NEW on a IF
CONDITION, I get an error even when testing BEFORE if it's a UPDATE
event or not.
example:
IF TG_OP = 'UPDATE' AND OLD.field != NEW.field THEN
...
END IF;
The question is: if the trigger was not fired by an UPDATE event,
shouldn't it make the first test and then ignore the rest of the condition?
I know that some languages work like this (testing the whole condition)
while others don't, but I searched for an alternative without success.
Any advice would be much appreciated!
Thanks in advance
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