znpt-backend/core/src/main/resources/mapper/MenuMapper.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.dite.znpt.mapper.MenuMapper">


    <select id="upwardRecursionSelect" resultType="com.dite.znpt.domain.entity.MenuEntity">
        WITH RECURSIVE MenuPath AS (
            SELECT * FROM menu
            WHERE terminal_type = #{terminalType}
                <choose>
                    <when test="menuName != null and menuName != ''">
                        AND menu_name LIKE concat('%',#{menuName}, '%') -- 起始菜单
                    </when>
                    <otherwise>
                        AND parent_id = '0' -- 起始菜单
                    </otherwise>
                </choose>
            UNION ALL
            SELECT m.* FROM menu m INNER JOIN MenuPath mp ON m.menu_id = mp.parent_id
        ) SELECT DISTINCT * FROM MenuPath;
    </select>

    <select id="downwardRecursionSelect" resultType="com.dite.znpt.domain.entity.MenuEntity">
        WITH RECURSIVE SubMenus AS (
            SELECT * FROM menu
            WHERE terminal_type = #{terminalType}
                <choose>
                    <when test="menuId != null and menuId != ''">
                        AND menu_id = #{menuId} -- 起始菜单ID
                    </when>
                    <otherwise>
                        AND parent_id = '0' -- 起始菜单
                    </otherwise>
                </choose>
            UNION ALL
            SELECT d.* FROM menu d INNER JOIN SubMenus sd ON d.parent_id = sd.menu_id
        ) SELECT * FROM SubMenus;
    </select>
</mapper>