Question: Can We Use Pragma Autonomous_transaction In Trigger?

Can we use commit in trigger?

Trigger should not commit and cannot commit.

Committing in a trigger usually raises an exception unless it happens into autonomous transaction.

When you open connection, Oracle creates session for it..

Can we write exception in trigger?

1 Answer. You’re almost there; you need a DECLARE block in a trigger if you want to declare anything; this means that your WHEN clause is in the wrong place. A few points: Never catch an exception and then call DBMS_OUTPUT.

What is autonomous transaction?

Autonomous Transactions. Autonomous transactions allow you to create a new transaction within a transaction that may commit. or roll back changes, independently of its parent transaction.

What is autonomous and accommodating transaction?

Autonomous transaction refer. to those international economic transactions that ate undertaken with the. sole motive of earning profit. Accommodating transactionefer. to those international economic transactions that are to correct the disequilibrium in the autonomus item.

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.

What is bulk collect in Oracle?

A bulk collect is a method of fetching data where the PL/SQL engine tells the SQL engine to collect many rows at once and place them in a collection. The SQL engine retrieves all the rows and loads them into the collection and switches back to the PL/SQL engine.

What is the difference between after and before trigger?

Before triggers execute before the data has been committed into the database. … After triggers execute after the data has been inserted or updated in the database. Usually after triggers are used because you need access to a formula field or the Id in the case of an insert.

Is it possible to use transaction control statements in database triggers?

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.

Is commit needed after insert?

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 .)

What is the advantage of Pragma autonomous transaction?

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.

Can we use TCL commands in trigger?

We cannot use TCL statements in triggers, because using them violates the integrity of the transaction. But if we want TCL statements to be used in triggers then that can be implemented by using Autonomous i.e. by providing PRAGMA AUTONOMOUS_TRANSACTION in the beginning of the trigger.

What is mutating in the trigger?

A mutating table error (ORA-04091) occurs when a row-level trigger tries to examine or change a table that is already undergoing change (via an INSERT, UPDATE, or DELETE statement). In particular, this error occurs when a row-level trigger attempts to read or write the table from which the trigger was fired.

What is the difference between Pragma Exception_init and Raise_application_error?

pragma exception init turns an Oracle Error into a named exception. If a database operation raises an ORA-00054 “resource busy”, you would have to code: …. … Raise_application_error is used to RAISE an error – exception_init is used to deal with errors (i guess you could say they are opposites in a way).

What is the Pragma Exception_init used for?

The pragma EXCEPTION_INIT associates an exception name with an Oracle error number. You can intercept any ORA- error and write a specific handler for it instead of using the OTHERS handler.

What is Pragma Serially_reusable and why is it used?

The pragma SERIALLY_REUSABLE indicates that the package state is needed only for the duration of one call to the server (for example, a PL/SQL anonymous block, an OCI call to the database or a stored procedure call through a database link).

What are autonomous items?

Autonomous Items: Autonomous items refer to those international economic transactions, which take place due to some economic motive such as profit maximization. These items are also known as ‘above the line items’. Autonomous transactions are independent of the state of BOP account.