<?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.yuanchu.mom.mapper.DepartmentMapper">
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<select id="selectDepartment" resultType="com.yuanchu.mom.dto.DepartmentDto">
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SELECT id, name, father_id
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FROM department
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</select>
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<select id="selectSonById" resultType="java.lang.Integer">
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SELECT au.id
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FROM (SELECT * FROM department WHERE father_id IS NOT NULL) au,
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(SELECT @father_id := #{id}) pd
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WHERE FIND_IN_SET(father_id, @father_id) > 0
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AND @father_id := concat(@father_id, ',', id)
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UNION
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SELECT id
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FROM department
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WHERE id = #{id}
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ORDER BY id
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</select>
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</mapper>
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