OLEDB QueryInterface Event Class

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

The OLEDB QueryInterface event class occurs when SQL Server issues an OLE DB QueryInterface call for distributed queries and remote stored procedures. Include this event class in traces that are monitoring problems associated with distributed queries and remote stored procedures.

When the OLEDB QueryInterface event class is included, the amount of overhead will be high. If such events occur frequently, the trace may significantly impede performance. To minimize overhead incurred, limit use of this event class to traces that monitor specific problems for brief periods of time.

OLEDB QueryInterface Event Class Data Columns

Data column name	Data type	Description	Column ID	Filterable
ApplicationName	nvarchar	Name 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.	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
Duration	bigint	Length of time to complete the OLE DB QueryInterface event.	13	No
EndTime	datetime	Time the event ended.	15	Yes
Error	int	Error number of a given event. Often this is the error number stored in the sys.messages catalog view.	31	Yes
EventClass	int	Type of event = 120.	27	No
EventSequence	int	Sequence of the OLE DB event class in the batch.	51	No
EventSubClass	int	0=Starting 1=Completed	21	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
IsSystem	int	Indicates whether the event occurred on a system process or a user process. 1 = system, 0 = user.	60	Yes
LinkedServerName	nvarchar	Name of the linked server.	45	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
MethodName	nvarchar	Name of the calling method.	47	No
NTDomainName	nvarchar	Windows domain to which the user belongs.	7	Yes
NTUserName	nvarchar	Windows user name.	6	Yes
ProviderName	nvarchar	Name of the OLE DB provider.	46	Yes
RequestID	int	ID of the request containing the statement.	49	Yes
SessionLoginName	nvarchar	Login 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.	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
TextData	nvarchar	Parameters sent and received in the OLE DB call.	1	No
TransactionID	bigint	System-assigned ID of the transaction.	4	Yes

See Also

Extended Events
sp_trace_setevent (Transact-SQL)
OLE Automation Objects in Transact-SQL