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CLR Event Category

Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance

The CLR event category includes event classes that are produced by the execution of .NET Framework common language runtime (CLR) objects inside SQL Server.

Assembly Load Event Class

The Assembly Load event class occurs when a request to load an assembly is executed.

Include the Assembly Load event class in traces where you want to monitor assembly loads. This can be useful when troubleshooting a query that uses common language runtime (CLR), when troubleshooting a slow running server that is running CLR queries, or when monitoring a server to gather user, database, success, or other information about assembly loads.

Assembly Load Event Class Data Columns

Data column name Data type Description Column ID Filterable
ApplicationName nvarchar The name of the application that requested the load. 10 Yes
ClientProcessID int ID 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. 9 Yes
DatabaseID int ID 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. 3 Yes
DatabaseName nvarchar Name of the database in which the user statement is running. 35 Yes
EventSequence int Sequence of a given event within the request. 51 No
GroupID int ID of the workload group where the SQL Trace event fires. 66 Yes
HostName nvarchar Name 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. 8 Yes
LoginName nvarchar Name of the login of the user (either SQL Server security login or the Microsoft Windows login credentials in the form of DOMAIN\username). 11 Yes
LoginSID image Security identifier (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. 41 Yes
NTDomainName nvarchar Windows domain to which the user belongs. 7 Yes
NTUserName nvarchar Windows user name. 6 Yes
ObjectID int Assembly ID. 22 Yes
ObjectName nvarchar Fully qualified name of the assembly. 34 Yes
RequestID int ID of the request containing the statement. 49 Yes
ServerName nvarchar Name of the instance of SQL Server being traced. 26 No
SessionLoginName nvarchar Login name of the user that 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. 64 Yes
SPID int ID of the session on which the event occurred. 12 Yes
StartTime datetime Time at which the event started, if available. 14 Yes
Success int Indicates whether the assembly load succeeded (1) or failed (0). 23 Yes
TextData ntext "Assembly Load Succeeded" if the load succeeds; otherwise, "Assembly Load Failed". 1 Yes

See Also

Extended Events
Assemblies (Database Engine)