Why control statements such a ROLLBACK or COMMIT of the Transaction are not written in the trigger?


Hello world

Why the ROLLBACK statement or COMMIT are not allowed in the trigger? and if I then use this problem may happen?

IndiMinds wrote:

Hello world

Why the ROLLBACK statement or COMMIT are not allowed in the trigger? and if I then use this problem may happen?

Because a trigger is NOT a transaction. This is a SINGLE STATEMENT, which is part of another transaction.

What is the problem? Well, if the trigger does not use the pragma AUTONOMOUS_TRANSACTION to the 'problem' that occurs is an Oracle exception, since you cannot use commit or rollback in the standard triggers.

If a trigger contained a VALIDATION you wouldn't be able to write a transaction that contained multiple measures correctly.

What happens if you insert rows in multiple tables and you want to perform a COMMIT ONLY if all three insertions succeed?

This is not possible if one of the tables had a trigger with a posting in it.

What do you want to learn more about?

Tags: Database

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