Similar event classes are grouped by a category. Each row in the sys.trace_categories catalog view identifies a category that is unique across the server. These categories do not change for a given version of the SQL Server Database Engine.
For a complete list of supported trace events, see SQL Server Event Class Reference.
IMPORTANT! This feature is in maintenance mode and may be removed in a future version of Microsoft SQL Server. Avoid using this feature in new development work, and plan to modify applications that currently use this feature. Use Extended Event catalog views instead.
|Column name||Data type||Description|
|category_id||smallint||Unique ID of this category. This column is also in the sys.trace_events catalog view.|
|name||nvarchar(128)||Unique name of this category. This parameter is not localized.|
0 = Normal
1 = Connection
2 = Error
The visibility of the metadata in catalog views is limited to securables that a user either owns or on which the user has been granted some permission. For more information, see Metadata Visibility Configuration.
Object Catalog Views (Transact-SQL)