执行SQL发生错误!错误:MySQL server has gone away,语句:SELECT COUNT(*) AS sum FROM ay_content a LEFT JOIN ay_content_sort b ON a.scode=b.scode LEFT JOIN ay_content_sort c ON a.subscode=c.scode LEFT JOIN ay_model d ON b.mcode=d.mcode LEFT JOIN ay_content_ext e ON a.id=e.contentid WHERE(a.scode in ('5','21','20') OR a.subscode='5') AND(a.status=1 AND d.type=2 AND a.date<'2020-11-27 11:29:50')
程序版本:2.0.9, 操作系统:Linux, WEB应用:nginx/1.8.1