As promised, here is the follow-up to the last post. This query gets us the names of all subcategories of a particular category in Commerce Server 2007.

DECLARE @categoryOid AS INT
SET @categoryOid = 937 ;

WITH    Cats2 ( oid, child_oid, hierarchy_level )
          AS ( SELECT   oid ,
                        child_oid ,
                        1 AS hierarchy_level
               FROM     dbo.ConsumerShop_CatalogHierarchy
               WHERE    oid = @categoryOid
                        AND CatalogName = 'ConsumerStaging'
               UNION ALL
               SELECT   h.oid ,
                        h.child_oid ,
                        c.hierarchy_level + 1 AS hierarchy_level
               FROM     dbo.ConsumerShop_CatalogHierarchy h
                        JOIN Cats2 c ON h.oid = c.child_oid
                                        AND h.CatalogName = 'ConsumerStaging'
             )
    SELECT  CategoryName
    FROM    dbo.ConsumerShop_CatalogProducts
    WHERE   oid IN ( SELECT DISTINCT ( oid ) 
					 FROM   Cats2 )