nlwiki Anomalous talk page redirects

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

Talk page redirects where the corresponding content page exists, but isn't also a redirect.

SQL

USE nlwiki_p;
SELECT t.page_namespace, t.page_title, s.page_namespace, s.page_title
FROM `page` t, `page` s
WHERE
	t.page_namespace != 3 AND	# exclude user talk
    t.page_title NOT REGEXP '^[0-9]+$' AND	# exclude year talk pages redirected to decade pages
    t.page_is_redirect=1 AND
    (t.page_namespace MOD 2)=1 AND
    s.page_namespace=(t.page_namespace-1) AND
    s.page_title=t.page_title AND
    s.page_is_redirect=0
ORDER BY s.page_namespace, s.page_title

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