MySQL實現樹狀所有子節點查詢的方法以及所有父節點查詢的方法

遞歸獲取當前節點下面的所有子節點數據 

 mysql 添加一個函數  getChild  
CREATE DEFINER=`root`@`localhost` FUNCTION `getChild`(rootId INT) RETURNS varchar(1000) CHARSET utf8
BEGIN
        DECLARE ptemp VARCHAR(1000);
        DECLARE ctemp VARCHAR(1000);
               SET ptemp = '#';
               SET ctemp =CAST(rootId AS CHAR);
               WHILE ctemp IS NOT NULL DO
                 SET ptemp = CONCAT(ptemp,',',ctemp);
                SELECT GROUP_CONCAT(id) INTO ctemp FROM fht_ams_dept   
                WHERE FIND_IN_SET(pid,ctemp)>0; 
               END WHILE;  
               RETURN ptemp;  
    END

 

@Query(value = " select id from fht_ams_dept where find_in_set(id,getChild(?1))" ,nativeQuery = true)
List<Long> findAllDeptIdChild(Long pid);

遞歸獲取當前節點上面的所有父節點數據

mysql 添加一個函數 
CREATE DEFINER=`root`@`%` FUNCTION `getParList`(rootId INT) RETURNS varchar(1000) CHARSET utf8mb4
BEGIN
    DECLARE sTemp VARCHAR(1000);
    DECLARE sTempPar VARCHAR(1000); 
    SET sTemp = ''; 
    SET sTempPar =rootId; 
 
    WHILE sTempPar is not null DO 
        
        IF sTemp != '' THEN
            SET sTemp = concat(sTemp,',',sTempPar);
        ELSE
            SET sTemp = sTempPar;
        END IF;
        SET sTemp = concat(sTemp,',',sTempPar); 
        SELECT group_concat(pid) INTO sTempPar FROM fht_ams_dept where pid<>id and FIND_IN_SET(id,sTempPar)>0; 
    END WHILE; 
 
RETURN sTemp; 
END

@Query(value = " select id from fht_ams_dept where status=1 and find_in_set(id,getParList(?1))" ,nativeQuery = true)
List<Long> findAllDeptIdParent(Long id);