- Can we write commit in function?
- What is Pragma Autonomous_transaction in trigger?
- Does insert statement need commit?
- Why commit is not used in triggers?
- Can rollback be done after commit?
- Can we write commit in function or trigger or procedure?
- Does Drop need commit?
- Is delete DDL or DML?
- Is commit needed after alter table?
- Can trigger change the table from which it has been called?
- Can rollback or commit issued inside a trigger code?
- How do you avoid mutating errors?
Can we write commit in function?
Yes, you can do that if you make the function an autonomous transaction.
That way it will not be part of the current transaction anymore.
Commit or roll back the current transaction, create a savepoint or roll back to a savepoint, or alter the session or the system..
What is Pragma Autonomous_transaction in trigger?
The AUTONOMOUS_TRANSACTION pragma changes the way a subprogram works within a transaction. A subprogram marked with this pragma can do SQL operations and commit or roll back those operations, without committing or rolling back the data in the main transaction.
Does insert statement need commit?
So yes, by default, if you’re just using INSERT , the records you insert will be committed, and there is no point trying to roll them back. (This is effectively the same as wrapping each statement between BEGIN and COMMIT .)
Why commit is not used in triggers?
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 rollback be done after commit?
A transaction is a sequence of SQL statements that Oracle Database treats as a single unit. … After you commit the transaction, the changes are visible to other users’ statements that execute after the commit. You can roll back (undo) any changes made during the transaction with the ROLLBACK statement (see ROLLBACK.
Can we write commit in function or trigger or procedure?
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.
Does Drop need commit?
ALTER FUNCTION , CREATE FUNCTION and DROP FUNCTION also cause an implicit commit when used with stored functions, but not with user-defined functions. ( ALTER FUNCTION can only be used with stored functions.) CREATE TABLE and DROP TABLE statements do not commit a transaction if the TEMPORARY keyword is used.
Is delete DDL or DML?
DML is Data Manipulation Language which is used to manipulate data itself. For example: insert, update, delete are instructions in SQL. It stands for Data Definition Language. … Basic command present in DDL are CREATE, DROP, RENAME, ALTER etc.
Is commit needed after alter table?
You don’t need commit after DDL.
Can trigger change the table from which it has been called?
A trigger cannot change the table from which it has been called. If there is a trigger called as a result of insert on a table, then the trigger cannot insert/update the same table.
Can rollback or commit issued inside a trigger code?
We can’t COMMIT/ROLLBACK in DML triggers because transaction is handled manually after DML statement. However, database triggers seems to be an exception. … The trigger does not contain autonomous transaction procedure with commit inside that, so who is commiting the insert?
How do you avoid mutating errors?
In this trigger:First, declare an array of customer record that includes customer id and credit limit.Second, collect affected rows into the array in the row-level trigger.Third, update each affected row in the statement-level trigger.