sql优化提高查询效率

esua-epdc/epdc-module/epdc-events/epdc-events-server/src/main/resources/mapper/item/ItemDao.xml

@@ -2222,8 +2222,14 @@
             epdc_item a
         LEFT JOIN (
             select h.id,h.item_id,h.created_time,h.state
-            from epdc_item_handle_process h
-            where h.del_flag = '0'
+            <!-- 此处关联主表增加主表查询条件为了提升查询效率 -->
+            from epdc_item ei
+            inner join epdc_item_handle_process h on ei.id = h.item_id
+            where  ei.is_people = '1'
+            and ei.del_flag = '0'
+            AND ei.event_id is NULL
+            AND ei.issue_id is NULL
+            and h.del_flag = '0'
             and h.created_time = (
                 select max(created_time)
                 from epdc_item_handle_process
@@ -2233,8 +2239,8 @@
             GROUP BY h.item_id
         )b ON a.id = b.item_id
         WHERE
-            a.del_flag = '0'
-        AND a.is_people = '1'
+            a.is_people = '1'
+        AND a.del_flag = '0'
         AND a.event_id is NULL
         AND a.issue_id is NULL
         <if test="deptId != null and deptId != ''">