苍穹外卖--分类管理代码导入

sky-server/src/main/java/com/sky/mapper/SetmealMapper.java

@@ -0,0 +1,17 @@
+package com.sky.mapper;
+
+import org.apache.ibatis.annotations.Mapper;
+import org.apache.ibatis.annotations.Select;
+
+@Mapper
+public interface SetmealMapper {
+
+    /**
+     * 根据分类id查询套餐的数量
+     * @param id
+     * @return
+     */
+    @Select("select count(id) from setmeal where category_id = #{categoryId}")
+    Integer countByCategoryId(Long id);
+
+}