Category path of article

Fork of Articles w/title matching regex in cat tree, w/path by Cryptic

This query is marked as a draft This query has been published by Rchard2scout.

SQL

SET @basecat='Opera';
SET max_recursive_iterations=7;

WITH RECURSIVE deepcat (subcat, catpath, depth) AS
(
  SELECT REPLACE(@basecat, '_', ' '), REPLACE(@basecat, '_', ' '), 0

  UNION

  SELECT page_title, CONCAT(catpath, ' > ', REPLACE(page_title, '_', ' ')), depth + 1
  FROM categorylinks
  JOIN page ON page_id = cl_from AND page_namespace = 14
  JOIN deepcat ON cl_to = subcat
)
SELECT DISTINCT REPLACE(page_title, '_', ' ') AS title,
       MIN(depth),
       MIN(catpath) OVER (PARTITION BY page_title ORDER BY depth ASC) AS 'category path'
FROM page
JOIN categorylinks ON cl_from = page_id
JOIN deepcat ON cl_to = subcat
WHERE page_namespace = 0
  AND page_title = 'Electrothermal-chemical technology'
ORDER BY MIN(depth) ASC;

SQL

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