Can we use Begin Tran and commit Tran

Question

Hi,
Can we use Begin Tran and commit Tran in sql user defined fuctions?
Thanks,

Answer 1

That's also documented:
http://download.oracle.com/docs/cd/B19306_01/server.102/b14200/statements_5009.htm#SQLRF01208
"Restrictions on User-Defined Functions User-defined functions are subject to the following restrictions:
* User-defined functions cannot be used in situations that require an unchanging definition. Thus, you cannot use user-defined functions:
o In a CHECK constraint clause of a CREATE TABLE or ALTER TABLE statement
o In a DEFAULT clause of a CREATE TABLE or ALTER TABLE statement
*In addition, when a function is called from within a query or DML statement, the function cannot*:
o Have OUT or IN OUT parameters
o *Commit or roll back the current transaction, create a savepoint or roll back to a savepoint, or alter the session or the system. DDL statements implicitly commit the current transaction, so a user-defined function cannot execute any DDL statements.*
o Write to the database, if the function is being called from a SELECT statement. However, a function called from a subquery in a DML statement can write to the database.
o Write to the same table that is being modified by the statement from which the function is called, if the function is called from a DML statement.
"