Why we Cannot use COMMIT inside a trigger?
Not only do triggers not need a COMMIT you can’t put one in: a trigger won’t compile if the body’s code includes a COMMIT (or a rollback). This is because triggers fire during a transaction. When the trigger fires the current transaction is still not complete.
Can I COMMIT in trigger?
Can we have COMMIT inside Trigger? Yes, you can commit inside the trigger. But for this you have to make this trigger transaction to be an Independent transaction from its parent transaction, you can do this by using Pragma.
Can we use Pragma Autonomous_transaction in trigger?
The trigger has pragma autonomous_transaction, and trigger works as intended.
Can we do COMMIT or ROLLBACK in a trigger?
We can’t COMMIT/ROLLBACK in DML triggers because transaction is handled manually after DML statement.
Can we use TCL commands in trigger?
Why? It is not possible. As triggers are defined for each table, if you use COMMIT of ROLLBACK in a trigger, it affects logical transaction processing.
Can we use exception in trigger?
A trigger exception (also known as a “blocking trigger”) is a kind of trigger that can be used to block another trigger’s ability to fire under certain conditions. For example, if a tag has a trigger to fire on all pages and a trigger exception that is set to “Page URL equals thankyou.
Can we use transaction in trigger?
Because the trigger will already be operating within the context of a transaction, the only transaction control statements you should ever consider using in a trigger are ROLLBACK and SAVE TRAN.
Can we use commit in triggers and cursors?
statements or the SELECT statement in the definition of a cursor. Also, no transaction control statements are allowed in a trigger. ROLLBACK , COMMIT , and SAVEPOINT cannot be used.
What is SAVEPOINT in Oracle with example?
The SAVEPOINT statement names and marks the current point in the processing of a transaction. With the ROLLBACK TO statement, savepoints undo parts of a transaction instead of the whole transaction. For syntax details on the SQL SAVEPOINT statement, see Oracle Database SQL Reference.
Can we ROLLBACK in trigger?
If a ROLLBACK TRANSACTION is issued in a trigger: All data modifications made to that point in the current transaction are rolled back, including any made by the trigger. The trigger continues executing any remaining statements after the ROLLBACK statement.
Is a DDL command?
DDL (Data Definition Language): It simply deals with descriptions of the database schema and is used to create and modify the structure of database objects in the database.DDL is a set of SQL commands used to create, modify, and delete database structures but not data.
How do you trigger an exception?
Throwing an exception is as simple as using the “throw” statement. You then specify the Exception object you wish to throw. Every Exception includes a message which is a human-readable error description. It can often be related to problems with user input, server, backend, etc.