mysql组织机构树迭代查询

转载自https://blog.csdn.net/u011935772/article/details/71419527

组织机构表结构

建表语句

drop table if exists Organize;

/*==============================================================*/
/* Table: Organize                                              */
/*==============================================================*/
create table Organize
(
   ID                   smallint not null auto_increment,
   ORG_NAME             int,
   UP_ID                int,
   ORG_CODE             char(4),
   primary key (ID)
);

初始化数据

迭代查询组织结构

oracle里面有迭代函数可用，

select XXX from table

start with XXX

connect by prior XXX

mysql没有类似的迭代函数，需要自己写

创建函数语句

CREATE FUNCTION `getChildLst`(rootId INT)
    RETURNS varchar(1000)
    BEGIN
      DECLARE sTemp VARCHAR(1000);
      DECLARE sTempChd VARCHAR(1000);

      SET sTemp = ‘$’;
      SET sTempChd =cast(rootId as CHAR);

      WHILE sTempChd is not null DO
        SET sTemp = concat(sTemp,’,’,sTempChd);
        SELECT group_concat(id) INTO sTempChd FROM organize where FIND_IN_SET(up_id,sTempChd)>0;
      END WHILE;
      RETURN sTemp;
    END

查询语句如下(增加模糊条件可以对迭代查询后的数据进行筛选)

select o.ID orgId,o.ORG_CODE orgCode,o.ORG_NAME orgName from organize o
where FIND_IN_SET(id, getChildLst(45)) and o.ORG_NAME like ‘%%’;

关键是mybatis如何实现动态sql

mybatis映射文件配置如下：

<select id=”findOrgInfListPage” resultMap=”OrgInfoListPageMap” parameterType=”java.lang.String”>
   select o.ID orgId,o.ORG_CODE orgCode,o.ORG_NAME orgName from organize o
   <where>
   <if test=”orgId != null and ” != orgId” >
           FIND_IN_SET(id, getChildLst(#{orgId}))
   </if>
   <if test=”orgName != null and ” != orgName” >
           and o.ORG_NAME like CONCAT(CONCAT(‘%’, #{orgName}), ‘%’)
    </if>
   </where>
</select>

映射的对象

public class OrgInfolistPage {

   private String orgId;

   private String orgCode;

   private String orgName;

   public String getOrgId() {
       return orgId;
   }

   public void setOrgId(String orgId) {
       this.orgId = orgId;
   }

   public String getOrgCode() {
       return orgCode;
   }

   public void setOrgCode(String orgCode) {
       this.orgCode = orgCode;
   }

   public String getOrgName() {
       return orgName;
   }

   public void setOrgName(String orgName) {
       this.orgName = orgName;
   }

}

OrganizeMapper：

List<OrgInfolistPage> findOrgInfListPage(@Param(value=”orgId”)String orgId,@Param(value=”orgName”)String orgName);