What is logon triggers in SQL Server?
Logon triggers fire stored procedures in response to a LOGON event. This event is raised when a user session is established with an instance of SQL Server. Logon triggers fire after the authentication phase of logging in finishes, but before the user session is actually established.
When can Login triggers be used?
We can use logon triggers to control the SQL login security. SQL Server automatically executes the logon triggers once a logon event occurs. It gets executed before a user session is established and authentication is successful. We use two terms for a database successful connection in any database.
Which conditions will result in the non establishment of a user session when implementing logon triggers?
This user session is not established when the transaction fails or is rolled back or an error is generated from the trigger with a severity of 20 or greater. In authentication fails, the logon trigger will not be fired.
What is Eventdata in SQL Server?
The main function of EventData () function is to return XML-formatted data about the event. EVENTDATA returns data only when referenced directly inside of a DDL or logon trigger. EVENTDATA returns null if it is called by other routines, even if those routines are called by a DDL or logon trigger.
What is a trigger in SQL with example?
A SQL trigger is a database object which fires when an event occurs in a database. We can execute a SQL query that will “do something” in a database when a change occurs on a database table such as a record is inserted or updated or deleted. For example, a trigger can be set on a record insert in a database table.
How do I see triggers in SQL Developer?
If you want to see the code of the trigger body, then the best way is probably to right-click on the trigger and select Single Record View from the pop-up menu.