<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
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<mapper namespace="com.by4cloud.platformx.device.mapper.DeviceClassMapper">
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<resultMap id="deviceClassMap" type="com.by4cloud.platformx.device.entity.DeviceClass">
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<id property="id" column="id"/>
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<result property="name" column="name"/>
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<result property="number" column="number"/>
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<result property="pNum" column="p_num"/>
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<result property="pId" column="p_id"/>
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<result property="depreciation" column="depreciation"/>
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<result property="beforeDate" column="before_date"/>
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<result property="remark" column="remark"/>
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<result property="createBy" column="create_by"/>
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<result property="createTime" column="create_time"/>
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<result property="updateBy" column="update_by"/>
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<result property="updateTime" column="update_time"/>
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<result property="delFlag" column="del_flag"/>
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</resultMap>
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<select id="selectEndNode" resultType="java.lang.Long">
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SELECT parent.id
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FROM (
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SELECT t1.*
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FROM device_class t1
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WHERE FIND_IN_SET(t1.id, (
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SELECT GROUP_CONCAT(id)
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FROM (
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SELECT id, IF(FIND_IN_SET(p_id, @pids) > 0, @pids := CONCAT(@pids, ',', id), 0) AS is_child
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FROM device_class, (SELECT @pids := #{classId}) tmp
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ORDER BY p_id
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) t
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WHERE is_child != 0
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)) OR t1.id = #{classId}
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) parent
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LEFT JOIN device_class child ON parent.id = child.p_id
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WHERE child.id IS NULL; -- 验证是否为末端节点
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</select>
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</mapper>
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