refactor(sql):优化仓库主表查询SQL别名命名

- 将oa_requirements表的别名从or改为req- 统一SQL查询中的表别名命名规范
- 避免与数据库关键字冲突的可能性

ruoyi-oa/src/main/resources/mapper/oa/SysOaProjectMapper.xml

@@ -65,6 +65,7 @@
         <result property="laborCost" column="labor_cost"/>
         <result property="projectCode" column="project_code"/>
         <result property="signingCompany" column="signing_company"/>
+        <result property="remainTime" column="remainTime"/>
     </resultMap>
 
 
@@ -587,7 +588,8 @@
                postpone_time,
                color,
                trade_type,
-               pre_pay
+               pre_pay,
+               TIMESTAMPDIFF(DAY, NOW(), sop.postpone_time) AS remainTime
         from sys_oa_project sop
         where sop.project_id = #{projectId}
     </select>