sys.extended_properties (Transact-SQL)
Returns a row for each extended property in the current database.
Column name |
Data type |
Description |
|---|---|---|
class |
tinyint |
Identifies the class of item on which the property exists. Can be one of the following: 0 = Database 1 = Object or column 2 = Parameter 3 = Schema 4 = Database principal 5 = Assembly 6 = Type 7 = Index 10 = XML schema collection 15 = Message type 16 = Service contract 17 = Service 18 = Remote service binding 19 = Route 20 = Dataspace (filegroup or partition scheme) 21 = Partition function 22 = Database file 27 = Plan guide |
class_desc |
nvarchar(60) |
Description of the class on which the extended property exists. Can be one of the following: DATABASE OBJECT_OR_COLUMN PARAMETER SCHEMA DATABASE_PRINCIPAL ASSEMBLY TYPE INDEX XML_SCHEMA_COLLECTION MESSAGE_TYPE SERVICE_CONTRACT SERVICE REMOTE_SERVICE_BINDING ROUTE DATASPACE PARTITION_FUNCTION DATABASE_FILE PLAN_GUIDE |
major_id |
int |
ID of the item on which the extended property exists, interpreted according to its class. For most items, this is the ID that applies to what the class represents. Interpretation for nonstandard major IDs is as follows: If class is 0, major_id is always 0. If class is 1, 2, or 7 major_id is object_id. |
minor_id |
int |
Secondary ID of the item on which the extended property exists, interpreted according to its class. For most items this is 0; otherwise, the ID is as follows: If class = 1, minor_id is the column_id if column, else 0 if object. If class = 2, minor_id is the parameter_id. If class 7 = minor_id is the index_id. |
name |
sysname |
Property name, unique with class, major_id, and minor_id. |
value |
sql_variant |
Value of the extended property. |
Permissions
In SQL Server 2005 and later versions, 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