添加对于消防合同数据表字段的修改，添加了合同的启示时间

amos-boot-system-jcs/src/main/resources/db/changelog/jcs-1.0.0.0.xml

@@ -97,5 +97,13 @@
 			ADD COLUMN maintenance_period VARCHAR ( 10 ) COMMENT '维保周期';
 		</sql>
 	</changeSet>
-	
+	<changeSet author="chenhao" id="2021-08-26-chenhao-1">
+		<preConditions onFail="MARK_RAN">
+			<tableExists tableName="cb_firefighters_contract"/>
+		</preConditions>
+		<comment>modify table cb_firefighters_contract add one columns</comment>
+		<sql>
+			ALTER TABLE `cb_firefighters_contract` ADD start_time date COMMENT '起始时间';
+		</sql>
+	</changeSet>
 </databaseChangeLog>