l3能源成本分摊（部分完成留存）

klp-ems/src/main/java/com/klp/ems/mapper/EmsRateTierMapper.java

@@ -0,0 +1,26 @@
+package com.klp.ems.mapper;
+
+import com.klp.ems.domain.EmsRateTier;
+import com.klp.ems.domain.vo.EmsRateTierVo;
+import com.klp.common.core.mapper.BaseMapperPlus;
+
+import java.util.List;
+
+/**
+ * 梯度费率Mapper接口
+ *
+ * @author Joshi
+ * @date 2025-12-05
+ */
+public interface EmsRateTierMapper extends BaseMapperPlus<EmsRateTierMapper, EmsRateTier, EmsRateTierVo> {
+
+    /**
+     * 根据费率ID查询梯度费率列表
+     */
+    List<EmsRateTierVo> selectByRateId(Long energyRateId);
+
+    /**
+     * 物理删除指定费率的所有梯度
+     */
+    int deleteByRateIdPhysical(Long energyRateId);
+}