MySQL server error report:Array ( [0] => Array ( [message] => MySQL Query Error ) [1] => Array ( [sql] => SELECT article_id, title, author, add_time, file_url, open_type FROM `xxxedu_ectouch`.`ecstc_article` WHERE is_open = 1 AND cat_id IN ('73') ORDER BY article_id DESC LIMIT 300, 50 ) [2] => Array ( [error] => Query execution was interrupted ) [3] => Array ( [errno] => 1317 ) )