The Polish actor fix

SQL

USE plwiki_p;

SELECT a.actor_name AS actorname, CONCAT("#") as number, user_id, CONCAT("[[user:",user_name,"|",user_name,"]]") AS user_name, SUM(CAST(rev.rev_len as signed)-CAST(parent.rev_len as signed)) AS byte_count
FROM user, actor a, user u
JOIN revision rev
ON a.actor_id = rev.rev_actor AND user_id=a.actor_user
JOIN revision parent
ON rev.rev_parent_id = parent.rev_id
JOIN page
ON page_id = parent.rev_page
WHERE page_namespace = 0
AND rev.rev_timestamp <= 20191231235959
AND parent.rev_timestamp <= 20191231235959
AND rev.rev_timestamp >= 20190101000000
AND parent.rev_timestamp >= 20190101000000
GROUP BY user_name
ORDER BY byte_count DESC
LIMIT 500;
SQL

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