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Object:Altered Event Class


Applies To: SQL Server 2016

The Object:Altered event class indicates that an object has been altered; for example, by an ALTER INDEX, ALTER TABLE, or ALTER DATABASE statement. This event class can be used to determine if objects are being altered; for example, by ODBC applications, which often create temporary stored procedures.

The Object:Altered event class always occurs as two events. The first event indicates the Begin phase. The second event indicates the Rollback or Commit phase.

By monitoring the LoginName and NTUserName data columns, you can determine the name of the user who is creating, deleting, or altering objects.

Data column nameData typeDescriptionColumn IDFilterable
ApplicationNamenvarcharName of the client application that created the connection to an instance of SQL Server. This column is populated with the values passed by the application rather than the displayed name of the program.10Yes
ClientProcessIDintID assigned by the host computer to the process where the client application is running. This data column is populated if the client provides the client process ID.9Yes
DatabaseIDintID of the database specified by the USE database statement or the default database if no USE database statement has been issued for a given instance. SQL Server Profiler displays the name of the database if the ServerName data column is captured in the trace and the server is available. Determine the value for a database by using the DB_ID function.3Yes
DatabaseNamenvarcharName of the database in which the user statement is running.35Yes
EventClassintType of event = 164.27No
EventSequenceintSequence of a given event within the request.51No
EventSubClassintType of event subclass.



GroupIDintID of the workload group where the SQL Trace event fires.66Yes
HostNamenvarcharName of the computer on which the client is running. This data column is populated if the client provides the host name. To determine the host name, use the HOST_NAME function.8Yes
IndexIDintID for the index on the object affected by the event. To determine the index ID for an object, use the index_id column of the sys.indexes catalog view.24Yes
IntegerDataintEvent sequence number of the corresponding Begin event. This column is available only for the Commit or Rollback type of event. subclass.25Yes
IsSystemintIndicates whether the event occurred on a system process or a user process. 1 = system, NULL = user.60Yes
LoginNamenvarcharName of the login of the user (either SQL Server security login or the Microsoft Windows login credentials in the form of DOMAIN\username).11Yes
LoginSidimageSecurity identification number (SID) of the logged-in user. You can find this information in the sys.server_principals catalog view. Each SID is unique for each login in the server.41Yes
NTDomainNamenvarcharWindows domain to which the user belongs.7Yes
NTUserNamenvarcharWindows user name.6Yes
ObjectIDintSystem-assigned ID of the object.22Yes
ObjectID2bigintPartition function ID when the partition schema is altered, the queue ID when service is altered or the collection schema ID when XML schema is altered.56Yes
ObjectNamenvarcharName of the object being referenced.34Yes
ObjectTypeintValue representing the type of the object involved in the event. This value corresponds to the type column in the sy.sobjects catalog view. For values, see ObjectType Trace Event Column.28Yes
RequestIDintID of the batch request containing the statement.49Yes
ServerNamenvarcharName of the instance of SQL Server being traced.26No
SessionLoginNamenvarcharLogin name of the user who originated the session. For example, if you connect to SQL Server using Login1 and execute a statement as Login2, SessionLoginName shows Login1 and LoginName shows Login2. This column displays both SQL Server and Windows logins.64Yes
SPIDintID of the session on which the event occurred.12Yes
StartTimedatetimeTime at which the event started, if available.14Yes
TransactionIDbigintSystem-assigned ID of the transaction.4Yes
XactSequencebigintToken that describes the current transaction.50Yes

Extended Events
sp_trace_setevent (Transact-SQL)

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