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

SQL

​x
 
SET @ns = 4; -- Wikipedia
SET @title = 'Arbitration/Policy/Proposed amendment (May 2023)';
SET @start_time = 20230517110303;
​
SET @title = REPLACE(@title, ' ', '_');
SET @start_time = CAST(@start_time AS DATETIME);
SET @one_month_timestamp = DATE_FORMAT(@start_time - INTERVAL 1 MONTH, '%Y%m%d%H%i%s');
SET @one_year_timestamp = DATE_FORMAT(@start_time - INTERVAL 1 MONTH - INTERVAL 1 YEAR, '%Y%m%d%H%i%s');
​
-- DELIMITER |
BEGIN NOT ATOMIC
  DECLARE r INT DEFAULT 0;
  DECLARE a_id BIGINT(20) UNSIGNED;
  DECLARE a_user INT(10) UNSIGNED;
  DECLARE a_name VARBINARY(255);
  DECLARE errs VARCHAR(1024);
​
  l1: LOOP
    SET r = r + 1;
    SET errs = '';
    SET a_id = NULL;
    -- This select is run on every iteration.  (At least it's fast.)
    -- Normally we'd use a temp table, but we don't have the permissions.
    -- Failing that, we'd use a cursor, but mariadb disallows that outside of stored procedures
    -- and we don't have the permissions to create those either.
    SELECT actor_id, actor_name, actor_user
    INTO a_id, a_name, a_user
    FROM (SELECT actor_id, actor_name, actor_user, ROW_NUMBER() OVER (ORDER BY first_rev) AS rn
          FROM
          (SELECT actor_id, actor_name, actor_user, MIN(rev_timestamp) AS first_rev
           FROM revision
           JOIN page ON page_id = rev_page
           JOIN actor_revision ON actor_id = rev_actor
           WHERE page_namespace = @ns
             AND page_title = @title
           GROUP BY actor_id, actor_name, actor_user) sq1) sq2
    WHERE rn = r;
    IF a_id IS NULL THEN
      LEAVE l1;
    END IF;
​
    IF a_user IS NULL THEN
      SET errs = CONCAT(errs, '; unregistered');
    ELSE
      BEGIN NOT ATOMIC
        DECLARE reg DATETIME;
        SELECT CAST(user_registration AS DATETIME) INTO reg FROM user WHERE user_id = a_user;
        IF reg > @start_time - INTERVAL 2 MONTH THEN
          SET errs = CONCAT(errs, '; not registed 2 months prior: ', reg);
        END IF;
      END;
    END IF;
​
    -- Performance here is why we can't just do one big query
    BEGIN NOT ATOMIC
      DECLARE edits_live, edits_del INT;
​
      SELECT COUNT(*)
      INTO edits_live
      FROM (SELECT 1
            FROM revision_userindex
            JOIN page ON page_id = rev_page
            WHERE page_namespace = 0
              AND rev_actor = a_id
              AND rev_timestamp <= @one_month_timestamp
            LIMIT 150) sq3;
​
      SELECT COUNT(*)
      INTO edits_del
      FROM (SELECT 1
            FROM archive_userindex
            WHERE ar_namespace = 0
              AND ar_actor = a_id
              AND ar_timestamp <= @one_month_timestamp
            LIMIT 150) sq4;
​
      IF edits_live + edits_del < 150 THEN
        SET errs = CONCAT(errs, '; too few mainspace edits as of 1 month prior: ', edits_live + edits_del);
      END IF;
    END;
​
    -- Performance here in one big query probably an issue too
    BEGIN NOT ATOMIC
      DECLARE edits_live INT;
​
      SELECT COUNT(*)
      INTO edits_live
      FROM (SELECT 1
            FROM revision_userindex
            JOIN page ON page_id = rev_page
            WHERE rev_actor = a_id
              AND rev_timestamp BETWEEN @one_year_timestamp AND @one_month_timestamp
            LIMIT 10) sq3;
​
      IF edits_live < 10 THEN
        SET errs = CONCAT(errs, '; too few live edits in the past year as of 1 month prior: ', edits_live);
      END IF;
    END;    
​
    -- For simplicity this won't see rangeblocks including unregistered editors, but they're disallowed above anyway
    IF EXISTS (SELECT 1 FROM ipblocks_ipindex WHERE ipb_address = a_name AND ipb_sitewide = 1) THEN
      SET errs = CONCAT(errs, '; blocked sitewide');
    END IF;
​
    IF EXISTS (SELECT 1 FROM user_groups WHERE ug_user = a_user AND ug_group = 'bot')
       OR EXISTS (SELECT 1
                  FROM categorylinks
                  JOIN page ON page_id = cl_from
                  WHERE cl_to = 'All_Wikipedia_bots'
                    AND page_namespace = 2
                    AND page_title = REPLACE(a_name, ' ', '_')) THEN
      SET errs = CONCAT(errs, '; bot');
    END IF;
​
    IF a_name RLIKE '[vV]anished|[rR]enamed' THEN
      SET errs = CONCAT(errs, '; "vanished" or "renamed" in username');
    END IF;
​
    IF errs != '' THEN
      SELECT a_name, SUBSTR(errs, 3) AS errs;
    END IF;
  END LOOP;
END -- |
-- DELIMITER ;
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