Ownerless pages in the user space on plwiki

SQL

USE plwiki_p;
SELECT page_namespace, CONCAT('[[User:',page_title,']]') AS page_title, page_len, page_is_redirect
FROM page
LEFT JOIN `user` ON user_name = REPLACE(page_title, '_', ' ')
WHERE page_namespace = 2
AND page_is_redirect = 0
AND page_title NOT LIKE '%/%'
AND page_title NOT LIKE '%\%'
AND page_title NOT RLIKE '(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)'
AND user_name IS NULL
#AND EXISTS (SELECT * FROM page AS p1 WHERE p1.page_namespace = 0 AND REPLACE(p1.page_title, '_', ' ') = REPLACE(user_name, '_', ' '))
ORDER BY page_len DESC;
SQL

Checking query status...
