<?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.pojo.Department">
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WITH RECURSIVE DepartmentHierarchy AS (
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SELECT id, name, father_id
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FROM department
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WHERE father_id IS NULL
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UNION ALL
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SELECT d.id, d.name, d.father_id
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FROM department d
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JOIN DepartmentHierarchy dh ON d.father_id = dh.id
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)
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SELECT id, name, father_id
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FROM DepartmentHierarchy;
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</select>
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</mapper>
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