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Bitmap Warning Event Class

The Bitmap Warning event class can be used to monitor bitmap filter usage in queries. The event subclass can be used to report when bitmap filters have been disabled in a query.

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

Identifier 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

EventClass

int

Type of event = 212.

27

No

EventSequence

int

Sequence of a given event within the request.

51

No

EventSubClass

int

Type of event subclass. 0 = bitmap filter is disabled.

21

Yes

HostName

nvarchar

Name of the computer on which the client is running. This data column is populated if the host name is provided by the client. 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

LoginName

nvarchar

Name of the login of the user (either SQL Server security login or the Windows login credentials in the form of DOMAIN\username).

11

Yes

LoginSid

image

Security 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.

41

Yes

NTDomainName

nvarchar

Windows domain to which the user belongs.

7

Yes

NTUserName

nvarchar

Windows user name.

6

Yes

ObjectID

int

Node ID of the root of the hash team involved in the repartition. Corresponds with the Node ID in Showplan.

22

Yes

RequestID

int

The 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 that the event started, if available.

14

Yes

TransactionID

bigint

System-assigned ID of the transaction.

4

Yes

XactSequence

bigint

Token that describes the current transaction.

50

Yes

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