- What is autonomous transaction?
- Can Commit be used in trigger?
- What is Pragma Exception_init How does it work?
- What is transaction in PL SQL?
- Can we compile package body without specification?
- Is commit needed after insert?
- What is Pragma exception?
- Can we use Pragma Autonomous_transaction in trigger?
- What is autonomous transaction in Oracle with example?
- What are Pragma statements?
- What are autonomous items?
- What does autonomous mean?
- What is autonomous and accommodating transaction?
- Can we call a procedure inside a function?
- What are ref cursors in Oracle?
- When we use Pragma autonomous transaction?
- What is the difference between Pragma Exception_init and Raise_application_error?
- What is the difference between after and before trigger?
- Why bulk collect is faster in Oracle?
- Can we write exception in trigger?
- What are accommodating transactions?
What is autonomous transaction?
Autonomous transactions allow you to create a new transaction within a transaction that may commit.
or roll back changes, independently of its parent transaction..
Can Commit be used 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.
What is Pragma Exception_init How does it work?
A pragma is a compiler directive that is processed at compile time, not at run time. In PL/SQL, the pragma EXCEPTION_INIT tells the compiler to associate an exception name with an Oracle error number. That lets you refer to any internal exception by name and to write a specific handler for it.
What is transaction in PL SQL?
PL/SQL transaction is a series of SQL data manipulation statements that are work logical unit. Transaction is an atomic unit all changes either committed or rollback. At the end of the transaction that makes database changes, Oracle makes all the changes permanent save or may be undone.
Can we compile package body without specification?
Yes, and these are quite useful when the package only contains variable and/or type declarations, e.g. CREATE PACKAGE no_body AS gc_yes CONSTANT VARCHAR2(1) := ‘Y’; END; Can we create a package body without specification ? The package body won’t be usable until you compile a package specification for it.
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 Pragma exception?
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. … A user-defined exception declared within the current scope. PRAGMA. Signifies that the statement is a compiler directive.
Can we use Pragma Autonomous_transaction in trigger?
The trigger has pragma autonomous_transaction, and trigger works as intended. …
What is autonomous transaction in Oracle with example?
Autonomous transactions allow you to leave the context of the calling transaction, perform an independant transaction, and return to the calling transaction without affecting it’s state. The autonomous transaction has no link to the calling transaction, so only commited data can be shared by both transactions.
What are Pragma statements?
The PRAGMA statement is an SQL extension specific to SQLite and used to modify the operation of the SQLite library or to query the SQLite library for internal (non-table) data. Some pragmas take effect during the SQL compilation stage, not the execution stage. …
What are 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.
What does autonomous mean?
self-governing; independent; subject to its own laws only. pertaining to an autonomy, or a self-governing community.
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.
Can we call a procedure inside a function?
You cannot execute a stored procedure inside a function, because a function is not allowed to modify database state, and stored procedures are allowed to modify database state. … A stored procedure might modify database state, or it might not.
What are ref cursors in Oracle?
Using REF CURSOR s is one of the most powerful, flexible, and scalable ways to return query results from an Oracle Database to a client application. A REF CURSOR is a PL/SQL data type whose value is the memory address of a query work area on the database. … A REF CURSOR refers to a memory address on the database.
When we use 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.
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 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.
Why bulk collect is faster in Oracle?
Since the BULK COLLECT fetches the record in BULK, the INTO clause should always contain a collection type variable. The main advantage of using BULK COLLECT is it increases the performance by reducing the interaction between database and PL/SQL engine.
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 are accommodating transactions?
Transfers of money, gold, or highly liquid assets that a central bank or other monetary authority makes to stabilize a country’s balance of payments. The accommodating transactions are not made for purposes of profit, but instead to help bring equilibrium to a country’s currency. …