开始录制完善

slive/src/main/resources/mapper/recordserver/RecordserverMapper.xml

         ,(r.rsmaxnum-count(distinct case when cs.sectionid is not null then cs.sectionid else null end))synum
         from l_recordserver r left join l_course_section_playback csp on r.rsid=csp.rsid
         left join l_course_section cs on csp.sectionid=cs.sectionid and cs.sectionstate=2
-        where r.rsstate=1 group by r.rsid having synum!=0)r order by synum desc,rand() limit 1
+        where r.rsstate=1 group by r.rsid having synum>0)r order by synum desc,rand() limit 1
     </select>
     <!--根据录制服务id获取地址-->
     <select id="getPathById" resultType="java.lang.String">