CTE and FOR XML to generate nested XML

Question

I have an adjacency list in the DB and want to deliver the data in XML format to the client through a SQL SP. I\'m trying to use CTE and FOR XML but I am not getting the XM

Answer 1

Turns out I didn't want the CTE at all, just a UDF that I call recursively

CREATE FUNCTION PageHierarchyNode(@PageId int)
RETURNS XML
WITH RETURNS NULL ON NULL INPUT 
BEGIN RETURN 
  (SELECT ModuleId AS "@ModuleId", PageId AS "@PageId",
    ParentPageId AS "@ParentPageId", PageUrl AS "@PageUrl",
    PageTitle AS "@PageTitle", PageOrder AS "@PageOrder", 
      CASE WHEN ParentPageId=@PageId
      THEN dbo.PageHierarchyNode(PageId)
      END
   FROM dbo.PageHierarchy WHERE ParentPageId=@PageId
   FOR XML PATH('Page'), TYPE)
END

with the SQL that calls the UDF as

SELECT ModuleId AS "@ModuleId", PageId AS "@PageId",
    ParentPageId AS "@ParentPageId", PageUrl AS "@PageUrl",
    PageTitle AS "@PageTitle", PageOrder AS "@PageOrder", 
    dbo.PageHierarchyNode(PageId)
FROM PageHierarchy
WHERE ParentPageId IS NULL
FOR XML PATH('Page'), ROOT('SiteMap'), TYPE