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Plan Guide Unsuccessful Event Class

The Plan Guide Unsuccessful event class indicates that SQL Server could not produce an execution plan for a query or batch that contained a plan guide. Instead, the plan was compiled without using the plan guide. The event fires when the following conditions are true:

  • The batch/module in the plan guide definition matches the batch that is being executed.

  • The query in the plan guide definition matches the query that is being executed.

  • The hints in the plan guide definition, including the USE PLAN hint, were not applied successfully to the query or batch. That is, the compiled query plan could not honor the specified hints and the plan was compiled without using the plan guide.

An invalid plan guide might cause this event to fire. Validate the plan guide that is used by the query or batch by using the sys.fn_validate_plan_guide function, and correct the error that is reported by this function.

This event is included in the SQL Server Profiler Tuning template.

Plan Guide Unsuccessful 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 that are passed by the application instead of 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 specified 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 = 218.

27

No

EventSequence

int

Sequence of a specific event within the request.

51

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

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 or the sys.sql_logins catalog views. 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

Object ID of the module that was being compiled when the plan guide was applied. If the plan guide was not applied to a module, this column is set to NULL.

22

Yes

RequestID

int

ID of the request that is containing the statement.

49

Yes

ServerName

nvarchar

Name of the instance of SQL Server that is 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

Name of the plan guide.

1

Yes

TransactionID

bigint

System-assigned ID of the transaction.

4

Yes

XactSequence

bigint

Token that describes the current transaction.

50

Yes