Reading XML attribute values using OPENXML - sql-server

Question

For the following .nodes() approach, I need an equivalent OPENXML approach. The Attributes will be different and can not be hard-coded.
DECLARE #Xml XML='<row>
<DeletedVal>
<row attribute1="value1" attribute2="value2"/>
</DeletedVal>
</row>';
SELECT x1.y.value('local-name(.)', 'VARCHAR(30)') AS [Key]
, x1.y.value('.', 'VARCHAR(MAX)') AS [Value]
FROM #Xml.nodes('/row/DeletedVal//#*') x1(y)
Output:
Key Value
------------------------------ ------
attribute1 value1
attribute2 value2
The following OPENXML approach needs fixing, where I am not sure how to get the attributes.
DECLARE #DocHandle INT
EXEC sp_xml_preparedocument
#DocHandle OUTPUT
, #Xml;
SELECT *
FROM OPENXML (#docHandle, N'/row/DeletedVal//#*')
WITH ([Key] VARCHAR(10) 'key' --- This line needs editing
, [Value] VARCHAR(10) '.')
EXEC Sp_xml_removedocument
#DocHandle;
Output:
Key Value
---------- ----------
NULL value1
NULL value2

Answer 1

As #Larnu correctly pointed out, Microsoft proprietary OPENXML and its companions sp_xml_preparedocument and sp_xml_removedocument are kept just for backward compatibility with the obsolete SQL Server 2000.
It is strongly recommended to re-write your SQL and switch it to XQuery. It is available in MS SQL Server starting from 2005 onwards.
I made some performance improvements to your T-SQL by removing the //#* (search for descendants everywhere down) from the .nodes() XQuery method.
DECLARE #Xml XML =
N'<row>
<DeletedVal>
<row attribute1="value1" attribute2="value2"/>
</DeletedVal>
</row>';
SELECT c.value('local-name(.)', 'VARCHAR(30)') AS [Key]
, c.value('.', 'VARCHAR(MAX)') AS [Value]
FROM #Xml.nodes('/row/DeletedVal/row/#*') AS t(c);
Output
+------------+--------+
| Key | Value |
+------------+--------+
| attribute1 | value1 |
| attribute2 | value2 |
+------------+--------+

Answer 2

Referring this link, I found the solution as below:
DECLARE #Xml XML='<row><DeletedVal><row attribute1="value1" attribute2="value2"/></DeletedVal></row>';
DECLARE #DocHandle INT
EXEC sp_xml_preparedocument
#DocHandle OUTPUT
, #Xml;
SELECT *
FROM OPENXML (#docHandle, N'/row/DeletedVal//#*')
WITH ([Key] VARCHAR(10) '#mp:localname'
, [Value] VARCHAR(10) '.')
EXEC Sp_xml_removedocument
#DocHandle;