解决 活动报名，user表的身份证为空，导致java解析身份证失败

esua-epdc/epdc-module/epdc-user/epdc-user-server/src/main/resources/mapper/UserDao.xml

@@ -13,7 +13,10 @@
             eu.NICKNAME AS nickname,
             eu.FACE_IMG AS faceImg,
             eu.MOBILE AS mobile,
-            eu.IDENTITY_NO AS identityNo,
+            CASE SUM(IFNULL(eu.IDENTITY_NO,0))
+				WHEN 0 THEN v.IDENTITY_NO
+				ELSE eu.IDENTITY_NO
+			END AS identityNo,
             eugr.ALL_DEPT_NAMES AS deptName,
             eu.REAL_NAME AS realName,
             eu.ROAD AS road,
@@ -31,6 +34,7 @@
         Left Join (select * from  epdc_user_grid_relation  where USER_ID = #{id} order by UPDATED_TIME desc limit 0,1) eugr
             on(eu.id=eugr.USER_ID)
         left join epdc_points_grade g ON 1=1 AND g.DEL_FLAG = 0
+        LEFT JOIN epdc_volunteer_info v ON eu.ID = v.USER_ID
         WHERE
             eu.ID = #{id}
     </select>