xp_logevent (Transact-SQL)

Artikel
05/16/2013

Logs a user-defined message in the SQL Server log file and in the Windows Event Viewer. xp_logevent can be used to send an alert without sending a message to the client.

Topic link icon Transact-SQL Syntax Conventions

Syntax

xp_logevent { error_number , 'message' } [ , 'severity' ]

Arguments

error_number
Is a user-defined error number larger than 50,000. The maximum value is 2147483647 (2^31 - 1).
' message '
Is a character string with a maximum of 2048 characters.
' severity '
Is one of three character strings: INFORMATIONAL, WARNING, or ERROR. severity is optional, with a default of INFORMATIONAL.

Return Code Values

0 (success) or 1 (failure)

Result Sets

xp_logevent returns the following error message for the included code example:

The command(s) completed successfully.

Remarks

When you send messages from Transact-SQL procedures, triggers, batches, and so on, use the RAISERROR statement instead of xp_logevent. xp_logevent does not call a message handler of a client or set @@ERROR. To write messages to the Windows Event Viewer and to the SQL Server error log file within an instance of SQL Server, execute the RAISERROR statement.

Permissions

Requires membership in the db_owner fixed database role in the master database, or membership in the sysadmin fixed server role.

Examples

The following example logs the message, with variables passed to the message in the Windows Event Viewer.

DECLARE @@TABNAME varchar(30)
DECLARE @@USERNAME varchar(30)
DECLARE @@MESSAGE varchar(255)
SET @@TABNAME = 'customers'
SET @@USERNAME = USER_NAME()
SELECT @@MESSAGE = 'The table ' + @@TABNAME + ' is not owned by the user 
   ' + @@USERNAME + '.'

USE master
EXEC xp_logevent 60000, @@MESSAGE, informational

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