OLEDB QueryInterface Event Class


Applies To: SQL Server 2016

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.

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
DurationbigintLength of time to complete the OLE DB QueryInterface event.13No
EndTimedatetimeTime the event ended.15Yes
ErrorintError number of a given event. Often this is the error number stored in the sys.messages catalog view.31Yes
EventClassintType of event = 120.27No
EventSequenceintSequence of the OLE DB event class in the batch.51No

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
IsSystemintIndicates whether the event occurred on a system process or a user process. 1 = system, 0 = user.60Yes
LinkedServerNamenvarcharName of the linked server.45Yes
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 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.41Yes
MethodNamenvarcharName of the calling method.47No
NTDomainNamenvarcharWindows domain to which the user belongs.7Yes
NTUserNamenvarcharWindows user name.6Yes
ProviderNamenvarcharName of the OLE DB provider.46Yes
RequestIDintID of the request containing the statement.49Yes
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
TextDatanvarcharParameters sent and received in the OLE DB call.1No
TransactionIDbigintSystem-assigned ID of the transaction.4Yes

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

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