Centralize empty talk pages of redirect

This query is marked as a draft This query has been published by EqJjgOa8rVvsRmZL.
SQL

/*
select page_title from page where page_namespace = 0 and page_is_redirect = 0
and page_title in (select page_title from page where page_namespace = 1 and page_is_redirect = 0 and page_len < 7)
*/

/*
select page_title, rd_title from page join redirect on rd_from = page_id and rd_namespace = 0
where page_namespace = 0 and page_is_redirect = 1
and page_title in (select page_title from page where page_namespace = 1 and page_is_redirect = 0 and page_len < 7)
and rd_title in (select page_title from page where page_namespace = 1 and page_is_redirect = 0)
*/

-- page_namespace, page_title, rd_namespace, rd_title
select CONCAT(CASE page_namespace + 1
                WHEN   -2 THEN 'Media:'             WHEN   -1 THEN 'Special:'
                WHEN    0 THEN ''                   WHEN    1 THEN 'Talk:'
                WHEN    2 THEN 'User:'              WHEN    3 THEN 'User talk:'
                WHEN    4 THEN 'Wikipedia:'         WHEN    5 THEN 'Wikipedia talk:'
                WHEN    6 THEN ':File:'             WHEN    7 THEN 'File talk:'
                WHEN    8 THEN 'MediaWiki:'         WHEN    9 THEN 'MediaWiki talk:'
                WHEN   10 THEN 'Template:'          WHEN   11 THEN 'Template talk:'
                WHEN   12 THEN 'Help:'              WHEN   13 THEN 'Help talk:'
                WHEN   14 THEN ':Category:'         WHEN   15 THEN 'Category talk:'
                WHEN  100 THEN 'Portal:'            WHEN  101 THEN 'Portal talk:'
                WHEN  108 THEN 'Book:'              WHEN  109 THEN 'Book talk:'
                WHEN  118 THEN 'Draft:'             WHEN  119 THEN 'Draft talk:'
                WHEN  446 THEN 'Education Program:' WHEN  447 THEN 'Education Program talk:'
                WHEN  710 THEN 'TimedText:'         WHEN  711 THEN 'TimedText talk:'
                WHEN  828 THEN 'Module:'            WHEN  829 THEN 'Module talk:'
                WHEN 2300 THEN 'Gadget:'            WHEN 2301 THEN 'Gadget talk:'
                WHEN 2302 THEN 'Gadget definition:' WHEN 2303 THEN 'Gadget definition talk:'
                ELSE CONCAT('{{ns:', page_namespace + 1, '}}:')
              END,
              page_title) AS url,
              CONCAT(CASE rd_namespace + 1
                WHEN   -2 THEN 'Media:'             WHEN   -1 THEN 'Special:'
                WHEN    0 THEN ''                   WHEN    1 THEN 'Talk:'
                WHEN    2 THEN 'User:'              WHEN    3 THEN 'User talk:'
                WHEN    4 THEN 'Wikipedia:'         WHEN    5 THEN 'Wikipedia talk:'
                WHEN    6 THEN ':File:'             WHEN    7 THEN 'File talk:'
                WHEN    8 THEN 'MediaWiki:'         WHEN    9 THEN 'MediaWiki talk:'
                WHEN   10 THEN 'Template:'          WHEN   11 THEN 'Template talk:'
                WHEN   12 THEN 'Help:'              WHEN   13 THEN 'Help talk:'
                WHEN   14 THEN ':Category:'         WHEN   15 THEN 'Category talk:'
                WHEN  100 THEN 'Portal:'            WHEN  101 THEN 'Portal talk:'
                WHEN  108 THEN 'Book:'              WHEN  109 THEN 'Book talk:'
                WHEN  118 THEN 'Draft:'             WHEN  119 THEN 'Draft talk:'
                WHEN  446 THEN 'Education Program:' WHEN  447 THEN 'Education Program talk:'
                WHEN  710 THEN 'TimedText:'         WHEN  711 THEN 'TimedText talk:'
                WHEN  828 THEN 'Module:'            WHEN  829 THEN 'Module talk:'
                WHEN 2300 THEN 'Gadget:'            WHEN 2301 THEN 'Gadget talk:'
                WHEN 2302 THEN 'Gadget definition:' WHEN 2303 THEN 'Gadget definition talk:'
                ELSE CONCAT('{{ns:', rd_namespace + 1, '}}:')
              END,
              rd_title) AS rd_url
from page join redirect on rd_from = page_id and rd_namespace % 2 = 0
where page_is_redirect = 1 and page_namespace % 2 = 0 and page_namespace not in (2)
and page_title in (
  select page_title from page where page_namespace = page_namespace + 1 and page_is_redirect = 0 and page_len < 6
)
and rd_title in (
  select page_title from page where page_namespace = rd_namespace + 1 and page_is_redirect = 0
)

/*
select count(*) from page where page_namespace = 1 and page_is_redirect = 0 and page_len = 0
and page_title in (select page_title from page where page_namespace = 0 and page_is_redirect = 1)
*/
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