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Applies to: 
SQL Server
Azure SQL Managed Instance
The sys.trace_subclass_values catalog view contains a list of named column values. These subclass values 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 will be removed in a future version of 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 |
|---|---|---|
| trace_event_id | smallint | ID of the trace event. This parameter is also in the sys.trace_events catalog view. |
| trace_column_id | smallint | ID of the trace column used for enumeration. This parameter is also in the sys.trace_columns catalog view. |
| subclass_name | nvarchar(128) | Meaning of the column value. |
| subclass_value | smallint | Column value. |
Permissions
The visibility of the metadata in catalog views is limited to securables that a user either owns, or on which the user was granted some permission. For more information, see Metadata Visibility Configuration.
See Also
Object Catalog Views (Transact-SQL)
sys.traces (Transact-SQL)
sys.trace_categories (Transact-SQL)
sys.trace_columns (Transact-SQL)
sys.trace_events (Transact-SQL)
sys.trace_event_bindings (Transact-SQL)