Doppeltes CTE - Quarry

SQL

WITH RECURSIVE Cat AS (SELECT 1 AS cat_use, page_title, page_id
                         FROM page
                        WHERE page_title IN ('Vorlage:nach_Artikelthema', 'Vorlage:Zitation')
                          AND page_namespace = 14
                 UNION SELECT 0 AS cat_use, page_title, page_id
                         FROM page
                        WHERE page_title = 'Vorlage:Navigationsleiste'
                          AND page_namespace = 14
                 UNION SELECT Cat.cat_use, SubCat.page_title, SubCat.page_id
                         FROM page AS SubCat, categorylinks, Cat
                        WHERE SubCat.page_namespace = 14
                          AND cl_from = SubCat.page_id
                          AND cl_to = Cat.page_title
                          AND cl_type = 'subcat'
                      )
SELECT DISTINCT IF(tl_from IS NULL, p.page_id, doku.page_id) AS page_id,
                IF(tl_from IS NULL, p.page_title, doku.page_title) as page_title
  FROM Cat, categorylinks, page AS p LEFT JOIN (templatelinks, page AS doku)
                                       ON tl_from = p.page_id
                                      AND tl_title LIKE '%/Doku'
                                      AND tl_namespace = 10
                                      AND doku.page_title = tl_title
                                      AND doku.page_namespace = 10
 WHERE Cat.cat_use = 1
   AND cl_to = Cat.page_title
   AND cl_from = p.page_id 
   AND p.page_namespace = 10
   /* AND p.page_title NOT LIKE '%/%' */
   AND NOT EXISTS (SELECT 1
                     FROM Cat, categorylinks
                    WHERE Cat.cat_use = 0
                      AND cl_to = Cat.page_title
                      AND cl_from = p.page_id
                  )  
   AND NOT EXISTS (SELECT 1
                     FROM templatelinks
                    WHERE tl_from = p.page_id
                      AND tl_title = 'Vorlagensuche'
                  )
SQL

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