Bad links from wikis to m, mw, species cats: broken

SQL

#USE dewiki_p;
#USE dewikisource_p;
#USE dewikivoyage_p;
#USE dewiktionary_p;
USE enwiki_p;
#USE frwiki_p;
#USE itwiki_p;
#USE nlwiki_p;
#USE specieswiki_p;
SET @w = LEFT (DATABASE(), LENGTH(DATABASE()) - 2); SET @l = (SELECT lang FROM meta_p.wiki WHERE dbname = @w);
#SET @p = '^$'; #dummy
#IF (@w = 'dewiki') THEN
# SET @p = '(?:^[0-9]{4}|^Aufgelöst_[0-9]|^Eingestellt_[0-9]|^Gegründet_[0-9]|^Gegründet_in_den_[0-9]|^Datei\:NowCommons$)';
#ELSEIF (@w = 'enwiki') THEN
# SET @p = '(?:^[0-9]{3}$|^AD_[0-9]|^Convert_to_SVG_and_copy_to_Wikimedia_Commons$|Wikipedia_files_with_.+_name_on_Wikimedia_Commons)';
#END IF;
#@len = LENGTH('https://meta.wikimedia.org/wiki/Category:') + 1;
SELECT now() AS timestamp;
#empty links, no target given
(SELECT CONCAT('# [[', IF (wp.page_namespace = 14, ':{{ns:14}}:', ''), REPLACE (wp.page_title, '_', ' '), ']] ',
               '→ [[:m:', REPLACE (iwl_title, '_', ' '), ']]') AS wikipage
FROM iwlinks
INNER JOIN page wp
ON wp.page_id = iwl_from
AND wp.page_namespace IN (0, 14)
WHERE iwl_prefix IN ('m', 'meta', 'metawikipedia')
AND iwl_title REGEXP '^Category: *$'
)
UNION
#broken interwikilinks
(SELECT CONCAT('# [[', IF (wp.page_namespace = 14, ':{{ns:14}}:', ''), REPLACE (wp.page_title, '_', ' '), ']] ',
               '→ [[:m:', REPLACE (iwl_title, '_', ' '), ']]') AS wikipage
FROM iwlinks
INNER JOIN page wp
ON wp.page_id = iwl_from
AND wp.page_namespace IN (0, 14)
AND wp.page_is_redirect = 0
#AND wp.page_title NOT REGEXP @p
WHERE iwl_prefix IN ('m', 'meta', 'metawikipedia')
AND iwl_title LIKE 'Category:%'
AND NOT EXISTS (SELECT 1 FROM metawiki_p.page cp
                WHERE cp.page_title = SUBSTRING(iwl_title, 10)
                AND cp.page_namespace = 14)
)
UNION
#broken external interwiki links
(SELECT CONCAT('# [[', IF (wp.page_namespace = 14, ':{{ns:14}}:', ''), REPLACE (wp.page_title, '_', ' '), ']] ',
               '→ [[:m:', REPLACE ((SUBSTRING(REPLACE (REPLACE (el_to, '#mw-subcategories', ''), CONCAT('?uselang=', @l), ''), 33)), '_', ' '), ']]') AS wikipage
FROM externallinks
INNER JOIN page wp
ON wp.page_id = el_from
AND wp.page_namespace IN (0, 14)
AND wp.page_is_redirect = 0
#AND wp.page_title NOT REGEXP @p
WHERE el_to LIKE 'https://meta.wikimedia.org/wiki/Category:%'
AND el_to NOT LIKE '%\%%' #temp
AND NOT EXISTS (SELECT 1 FROM metawiki_p.page cp
                WHERE cp.page_namespace = 14
                AND cp.page_title = SUBSTRING(REPLACE (REPLACE (el_to, '#mw-subcategories', ''), CONCAT('?uselang=', @l), ''), 42)
               )
)
ORDER BY wikipage
LIMIT 1000;
SQL

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