sys.trace_subclass_values (Transact-SQL)

THIS TOPIC APPLIES TO:yesSQL Server (starting with 2008)noAzure SQL DatabasenoAzure SQL Data Warehouse noParallel Data Warehouse

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.


This feature will 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
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.


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.

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)