Showplan XML Event Class

The Showplan XML event class occurs when Microsoft SQL Server executes an SQL statement. Include the Showplan XML event class to identify the Showplan operators. This event class stores each event as a well-defined XML document.

When the Showplan XML event class is included in a trace, the amount of overhead will significantly impede performance. Showplan XML stores a query plan that is created when the query is optimized. To minimize the overhead incurred, limit use of this event class to traces that monitor specific problems for brief periods of time.

The Showplan XML documents have a schema associated with them. This schema can be found at the Microsoft Web Site, or as part of your Microsoft SQL Server installation.

Showplan XML 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
BinaryData image Estimated cost of the query. 2 No
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 process ID is provided by the client. 9 Yes
DatabaseID int ID of the database specified by the USE database statement or the default database if no USE databasestatement 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. 35 No
Event Class int Type of Event = 122. 27 No
EventSequence int The 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 host name is provided by the client. To determine the host name, use the HOST_NAME function. 8 Yes
Integer Data integer Estimated number of rows returned. 25 Yes
IsSystem int Indicates whether the event occurred on a system process or a user process. 1 = system, 0 = user. 60 Yes
LineNumber int Displays the number of the line containing the error. 5 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 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 No
NestLevel int Integer representing the data returned by @@NESTLEVEL. 29 Yes
NTDomainName nvarchar Windows domain to which the user belongs. 7 Yes
ObjectID int System-assigned ID of the object. 22 Yes
ObjectName nvarchar Name of the object being referenced. 34 Yes
ObjectType int Value representing the type of the object involved in the event. This value corresponds to the type column in the sys.objects catalog view. For values, see ObjectType Trace Event Column. 28 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 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 ntext Text value dependent on the event class captured in the trace. 1 Yes
TransactionID bigint System-assigned ID of the transaction. 4 Yes
XactSequence bigint Token used to describe the current transaction. 50 Yes

See Also

Extended Events
sp_trace_setevent (Transact-SQL)
Showplan Logical and Physical Operators Reference