TSQL - use variables in OPENXML - sql

Question

Suppose I have a query like this -
SELECT * FROM
OPENXML(#i, '/root/authors', 2)
WITH authors
Now, I want to pass '/root' via a parameter/variable like -
DECLARE #nodeName varchar(MAX) ----> EDIT: Solution- Use fixed length instead of MAX
SET #nodeName = '/root'
and use #nodeName instead. Then concatenate the rest of the elements dynamically.
I am getting error just by using #nodeName in the OPENXML parameter.

Answer 1

Better to use the new XML type.
create proc [dbo].[getLocationTypes](#locationIds XML,
#typeIds XML=null)
as
begin
set nocount on
SELECT locationId, typeId
FROM xrefLocationTypes
WHERE locationId
IN (SELECT Item.value('.', 'int' )
FROM #locationIDs.nodes('IDList/ID') AS x(Item))
AND (typeId IN
(SELECT Item.value('.', 'int' )
FROM #typeIds.nodes('IDList/ID') AS x(Item)))
ORDER BY 1, 2
end
And then you would call this like:
EXECUTE dbo.getLocationTypes '<IDList><ID>1</ID><ID>3</ID></IDList>',
'<IDList><ID>200</ID><ID>300</ID><ID>400</ID></IDList>'

Answer 2

I tried the following in SQL 2008 R2 and it works fine.
DECLARE #idoc int
DECLARE #doc varchar(1000)
SET #doc ='
<ROOT>
<Customer CustomerID="VINET" ContactName="Paul Henriot">
<Order CustomerID="VINET" EmployeeID="5" OrderDate="1996-07-04T00:00:00">
<OrderDetail OrderID="10248" ProductID="11" Quantity="12"/>
<OrderDetail OrderID="10248" ProductID="42" Quantity="10"/>
</Order>
</Customer>
<Customer CustomerID="LILAS" ContactName="Carlos Gonzlez">
<Order CustomerID="LILAS" EmployeeID="3" OrderDate="1996-08-16T00:00:00">
<OrderDetail OrderID="10283" ProductID="72" Quantity="3"/>
</Order>
</Customer>
</ROOT>'
--Create an internal representation of the XML document.
EXEC sp_xml_preparedocument #idoc OUTPUT, #doc
-- Execute a SELECT statement that uses the OPENXML rowset provider.
DECLARE #NodeName VARCHAR(100)
SET #NodeName = '/ROOT/Customer'
SELECT *
FROM OPENXML (#idoc, #NodeName,1)
WITH (CustomerID varchar(10),
ContactName varchar(20))
It could be that other versions of SQL only support the use of NVARCHAR as a parameter, not VARCHAR.
I hope this help.