Merge branch 'maintenance_feature'

mec-biz/src/main/resources/config/mybatis/StudentInstrumentMapper.xml

@@ -79,12 +79,8 @@
             <if test="operation != null">
                 operation_ = #{operation},
             </if>
-            <if test="startTime != null">
-                start_time_ = #{startTime},
-            </if>
-            <if test="endTime != null">
-                end_time_ = #{endTime},
-            </if>
+            start_time_ = #{startTime},
+            end_time_ = #{endTime},
             <if test="changeOrderId != null">
                 change_order_id_ = #{changeOrderId},
             </if>