扫描统计速度优化

distributed-print-business/src/main/resources/mapper/ExamTaskMapper.xml

@@ -1547,6 +1547,7 @@
                     <if test="paperNumber != null and paperNumber != ''">
                         AND ms.paper_number = #{paperNumber}
                     </if>
+                    and ms.scan_status <![CDATA[ <> ]]> 'UNEXIST'
                 </where>) t
     </select>
 </mapper>