sys.selective_xml_index_paths (Transact-SQL)
Available beginning in SQL Server 2012 Service Pack 1, each row in sys.selective_xml_index_paths represents one promoted path for particular selective xml index.
If you create a selective xml index on xmlcol of table T using following statement,
CREATE SELECTIVE XML INDEX sxi1 ON T(xmlcol)
FOR ( path1 = '/a/b/c' AS XQUERY 'xs:string',
path2 = '/a/b/d' AS XQUERY 'xs:double'
)
There will be two new rows in sys.selective_xml_index_paths corresponding to the index sxi1.
Column name |
Data type |
Description |
|---|---|---|
object_id |
int |
ID of table with XML column. |
index_id |
int |
Unique id of the selective xml index. |
path_id |
int |
Promoted XML path id. |
path |
nvarchar(4000) |
Promoted path. For example, '/a/b/c/d/e'. |
name |
sysname |
Path name. |
path_type |
tinyint |
0 = XQUERY 1 = SQL |
path_type_desc |
sysname |
Based on path_type value 'XQUERY' or 'SQL'. |
xml_component_id |
int |
Unique ID of the XML schema component in the database. |
xquery_type_description |
nvarchar(4000) |
Name of the specified xsd type. |
is_xquery_type_inferred |
bit |
1 = type is inferred. |
xquery_max_length |
smallint |
Max length (in character of xsd type). |
is_xquery_max_length_inferred |
bit |
1 = maximum length is inferred. |
is_node |
bit |
0 = node() hint not present. 1 = node() optimization hint applied. |
system_type_id |
tinyint |
ID of the system type of the column. |
user_type_id |
tinyint |
ID of the user type of the column. |
max_length |
smallint |
Max Length (in bytes) of the type. -1 = Column data type is varchar(max), nvarchar(max), varbinary(max), or xml. |
precision |
tinyint |
Maximum precision of the type if it is numeric-based. Otherwise 0. |
scale |
tinyint |
Maximum scale of the type if it is numeric-based. Otherwise, 0. |
collation_name |
sysname |
Name of the collation of the type if it is character-based. Otherwise, NULL. |
is_singleton |
bit |
0 = SINGLETON hint not present. 1 = SINGLETON optimization hint applied. |
Permissions
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.