[BROKEN] Find Dutch metapage sitelinks by title

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

Project pages, help pages, categories, templates and Scribunto modules on Dutch non-Wikipedia wikis that are not linked in Wikidata but have a page of the same (sub)name in Dutch Wikipedia.

Monstrous query with REGEXPs across 7 databases, but executes in ~10 s.

SQL

SELECT 'b' AS prefix, page_namespace AS ns, page_title AS title, page_is_new AS new, page_len AS len
FROM nlwikibooks_p.page b
WHERE
	page_is_redirect=0 AND page_namespace IN (4, 10, 12, 14, 828) AND page_title NOT REGEXP '/(doc$|[Aa]rchief)' AND
    NOT EXISTS (SELECT * FROM nlwikibooks_p.page_props WHERE page_id=pp_page AND pp_propname='wikibase_item') AND
    (((page_namespace!=14 OR b.page_title NOT REGEXP '^Wikibooks:') AND EXISTS (SELECT * FROM nlwiki_p.page w WHERE 
             w.page_is_redirect=0 AND b.page_namespace=w.page_namespace AND b.page_title=w.page_title)
      ) OR (page_namespace=14 AND b.page_title REGEXP '^Wikibooks:' AND
      	EXISTS (SELECT * FROM nlwiki_p.page w WHERE w.page_is_redirect=0 AND w.page_namespace=14 AND 
             w.page_title REGEXP '^Wikipedia:' AND REGEXP_SUBSTR(b.page_title,':.*$')=REGEXP_SUBSTR(w.page_title,':.*$'))
    ))
UNION
SELECT 'n' AS prefix, page_namespace AS ns, page_title AS title, page_is_new AS new, page_len AS len
FROM nlwikinews_p.page b
WHERE
	page_is_redirect=0 AND page_namespace IN (4, 10, 12, 14, 828) AND page_title NOT REGEXP '/(doc$|[Aa]rchief)' AND
    NOT EXISTS (SELECT * FROM nlwikinews_p.page_props WHERE page_id=pp_page AND pp_propname='wikibase_item') AND
    ((page_namespace!=14 AND EXISTS (SELECT * FROM nlwiki_p.page w WHERE 
             w.page_is_redirect=0 AND b.page_namespace=w.page_namespace AND b.page_title=w.page_title)
      ) OR (page_namespace=14 AND b.page_title REGEXP '^Wikinieuws:' AND
      	EXISTS (SELECT * FROM nlwiki_p.page w WHERE w.page_is_redirect=0 AND w.page_namespace=14 AND 
             w.page_title REGEXP '^Wikipedia:' AND REGEXP_SUBSTR(b.page_title,':.*$')=REGEXP_SUBSTR(w.page_title,':.*$'))
    ) OR (page_namespace=14 AND b.page_title NOT REGEXP '^Wikinieuws:' AND
      	EXISTS (SELECT * FROM nlwiki_p.page w WHERE w.page_is_redirect=0 AND w.page_namespace=0 AND b.page_title=w.page_title)
    ))
UNION
SELECT 'q' AS prefix, page_namespace AS ns, page_title AS title, page_is_new AS new, page_len AS len
FROM nlwikiquote_p.page b
WHERE
	page_is_redirect=0 AND page_namespace IN (4, 10, 12, 14, 828) AND page_title NOT REGEXP '/(doc$|[Aa]rchief)' AND
    NOT EXISTS (SELECT * FROM nlwikiquote_p.page_props WHERE page_id=pp_page AND pp_propname='wikibase_item') AND
    (((page_namespace!=14 OR b.page_title NOT REGEXP '^Wikiquote:') AND EXISTS (SELECT * FROM nlwiki_p.page w WHERE 
             w.page_is_redirect=0 AND b.page_namespace=w.page_namespace AND b.page_title=w.page_title)
      ) OR (page_namespace=14 AND b.page_title REGEXP '^Wikiquote:' AND
      	EXISTS (SELECT * FROM nlwiki_p.page w WHERE w.page_is_redirect=0 AND w.page_namespace=14 AND 
             w.page_title REGEXP '^Wikipedia:' AND REGEXP_SUBSTR(b.page_title,':.*$')=REGEXP_SUBSTR(w.page_title,':.*$'))
    ))
UNION
SELECT 's' AS prefix, page_namespace AS ns, page_title AS title, page_is_new AS new, page_len AS len
FROM nlwikisource_p.page b
WHERE
	page_is_redirect=0 AND page_namespace IN (4, 10, 12, 14, 828) AND page_title NOT REGEXP '/(doc$|[Aa]rchief)' AND
    NOT EXISTS (SELECT * FROM nlwikisource_p.page_props WHERE page_id=pp_page AND pp_propname='wikibase_item') AND
    (((page_namespace!=14 OR b.page_title NOT REGEXP '^Wikisource:') AND EXISTS (SELECT * FROM nlwiki_p.page w WHERE 
             w.page_is_redirect=0 AND b.page_namespace=w.page_namespace AND b.page_title=w.page_title)
      ) OR (page_namespace=14 AND b.page_title REGEXP '^Wikisource:' AND
      	EXISTS (SELECT * FROM nlwiki_p.page w WHERE w.page_is_redirect=0 AND w.page_namespace=14 AND 
             w.page_title REGEXP '^Wikipedia:' AND REGEXP_SUBSTR(b.page_title,':.*$')=REGEXP_SUBSTR(w.page_title,':.*$'))
    ))
UNION
SELECT 'voy' AS prefix, page_namespace AS ns, page_title AS title, page_is_new AS new, page_len AS len
FROM nlwikivoyage_p.page b
WHERE
	page_is_redirect=0 AND page_namespace IN (4, 10, 12, 14, 828) AND page_title NOT REGEXP '/(doc$|[Aa]rchief)' AND
    NOT EXISTS (SELECT * FROM nlwikivoyage_p.page_props WHERE page_id=pp_page AND pp_propname='wikibase_item') AND
    (((page_namespace!=14 OR b.page_title NOT REGEXP '^Wikivoyage:') AND EXISTS (SELECT * FROM nlwiki_p.page w WHERE 
             w.page_is_redirect=0 AND b.page_namespace=w.page_namespace AND b.page_title=w.page_title)
      ) OR (page_namespace=14 AND b.page_title REGEXP '^Wikivoyage:' AND
      	EXISTS (SELECT * FROM nlwiki_p.page w WHERE w.page_is_redirect=0 AND w.page_namespace=14 AND 
             w.page_title REGEXP '^Wikipedia:' AND REGEXP_SUBSTR(b.page_title,':.*$')=REGEXP_SUBSTR(w.page_title,':.*$'))
    ))
UNION
SELECT 'wikt' AS prefix, page_namespace AS ns, page_title AS title, page_is_new AS new, page_len AS len
FROM nlwiktionary_p.page b
WHERE
	page_is_redirect=0 AND page_namespace IN (4, 10, 12, 14, 828) AND page_title NOT REGEXP '/(doc$|[Aa]rchief)' AND
    NOT EXISTS (SELECT * FROM nlwiktionary_p.page_props WHERE page_id=pp_page AND pp_propname='wikibase_item') AND
    (((page_namespace!=14 OR b.page_title NOT REGEXP '^WikiWoordenboek:') AND EXISTS (SELECT * FROM nlwiki_p.page w WHERE 
             w.page_is_redirect=0 AND b.page_namespace=w.page_namespace AND b.page_title=w.page_title)
      ) OR (page_namespace=14 AND b.page_title REGEXP '^WikiWoordenboek:' AND
      	EXISTS (SELECT * FROM nlwiki_p.page w WHERE w.page_is_redirect=0 AND w.page_namespace=14 AND 
             w.page_title REGEXP '^Wikipedia:' AND REGEXP_SUBSTR(b.page_title,':.*$')=REGEXP_SUBSTR(w.page_title,':.*$'))
    ))
ORDER BY ns, title, prefix

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