Untitled query #78437

SQL

SET @basecat = 'Media contributed by the Plains to Peaks Collective';
SET max_recursive_iterations = 3; -- current maximum depth for this tree; 2504 categories, 8883596 pages

SET @basecat = REPLACE(@basecat, ' ', '_');
WITH RECURSIVE deepcat (subcat) AS
(
  SELECT @basecat

  UNION DISTINCT

  SELECT page_title
  FROM categorylinks
  JOIN page ON page_id = cl_from AND page_namespace = 14
  JOIN deepcat ON cl_to = subcat
),
ns(ns_n, ns_s) AS (VALUES (-2, 'Media:'), (-1, 'Special:'), (0, ''), (1, 'Talk:'), (2, 'User:'), (3, 'User talk:'), (4,
  'Wikipedia:'), (5, 'Wikipedia talk:'), (6, ':File:'), (7, 'File talk:'), (8, 'MediaWiki:'), (9, 'MediaWiki talk:'), (10, 'Template:'),
  (11,  'Template talk:'), (12, 'Help:'), (13, 'Help talk:'), (14, ':Category:'), (15, 'Category talk:'), (100, 'Portal:'), (101,
  'Portal talk:'), (118, 'Draft:'), (119, 'Draft talk:'), (710, 'TimedText:'), (711, 'TimedText talk:'), (828, 'Module:'), (829,
  'Module talk:'), (2300, 'Gadget:'), (2301, 'Gadget talk:'), (2302, 'Gadget definition:'), (2303, 'Gadget definition talk:'))
SELECT ns_s, (DISTINCT page_title AS title)
FROM page
JOIN categorylinks ON cl_from = page_id
JOIN deepcat ON cl_to = subcat
LEFT JOIN ns ON ns_n = page_namespace
GROUP BY page_namespace;
SQL

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