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OLEDB QueryInterface Event Class

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 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 sysmessages table.

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

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 syslogins table of the master database. 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

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