树形菜单 的mysql 存储过程实现增删查


添加：入参：IN nodename VARCHAR(50),IN pageUrl VARCHAR(50),IN type INT,IN pid INT

BEGIN

DECLARE declLID INT default -1;

DECLARE declRID INT default -1;

DECLARE declNID INT default 0;

DECLARE declTree INT default -1;

DECLARE declNkID INT default -1;

DECLARE declCNT INT default 0;



set declNkID=(select count(*)+1 from t_plat_admin_left_tree);

SET declCNT =(select count(*) from t_plat_admin_left_tree);

SELECT declNkID;



IF declCNT <=0 THEN

-- 根节点赋初值

SELECT declLID,declRID,declNID,declTree,declNkID,declCNT;

INSERT INTO t_plat_admin_left_tree(id,LID,RID,Tree,NodeName,fid,tp) VALUES (0,1,2,0,'根节点',-1,0) ;

else

BEGIN

IF pid = 0 then



SELECT tpal.RID into declRID FROM t_plat_admin_left_tree tpal WHERE ID=pid;

SET declNID=declRID/2;

UPDATE t_plat_admin_left_tree SET RID = RID + 2 WHERE id=0;



INSERT INTO t_plat_admin_left_tree(id,LID,RID,Tree,NodeName,fid,tp) VALUES (declNID,declRID,declRID + 1,1,NodeName,PID,TYPE) ;

ELSE

SELECT LID, RID, Tree + 1 INTO declLID,declRID,declTree

FROM t_plat_admin_left_tree WHERE ID = PID;



SET declNID=pid+(declRID-declLID+1)/2;



UPDATE t_plat_admin_left_tree SET RID = RID + 2 WHERE RID >= declRID ;

UPDATE t_plat_admin_left_tree SET LID = LID + 2 WHERE LID > declRID ;

UPDATE t_plat_admin_left_tree SET ID = ID + 1 WHERE LID > declRID;

UPDATE t_plat_admin_left_tree SET fID = fID + 1 WHERE fid> pid AND RID>declRID;





INSERT INTO t_plat_admin_left_tree(id,LID,RID,Tree,NodeName,fid,tp) VALUES (declNID,declRID,declRID + 1,Tree,NodeName,pid,type) ;



end if;

END;

end if;



SELECT declNkID ;

select * from t_plat_admin_left_tree;

END

删除：入参：IN `inid` int

BEGIN

DECLARE delcLID INT DEFAULT 0;

DECLARE delcRID INT DEFAULT 0;

DECLARE delcWID INT DEFAULT 0;

DECLARE delcDID INT DEFAULT 0;

DECLARE delcNUM int DEFAULT 0;

-- set @NUM=delcNUM;

-- select id,lid,rid,wid from t_plat_admin_left_tree tpaf where tpaf.id=id;



SELECT tpaf.ID, tpaf.LID, tpaf.RID, RID - LID + 1 into delcDID ,delcLID ,delcRID,delcWID FROM t_plat_admin_left_tree tpaf WHERE tpaf.ID = inid ;





IF delcDID != 0 THEN

select delcWID/2 into delcNUM;

SELECT delclid,delcrid,delcWID,inid;



SELECT * FROM t_plat_admin_left_tree WHERE LID BETWEEN delcLID AND delcRID;

DELETE FROM t_plat_admin_left_tree WHERE LID BETWEEN delcLID AND delcRID;



UPDATE t_plat_admin_left_tree SET RID = RID - delcWID WHERE RID > delcRID;

UPDATE t_plat_admin_left_tree SET LID = LID - delcWID WHERE LID > delcRID ;

update t_plat_admin_left_tree set ID=ID-delcNUM where ID>inid;

update t_plat_admin_left_tree set FID=FID-delcNUM where FID>delcID;

END IF;

SELECT delcDID ;

END

查询：入参：IN pid int ,IN delctree int

BEGIN

SELECT Z.ID,z.lid,z.rid,Z.Tree,Z.NodeName,z.fid,z.tp

FROM t_plat_admin_left_tree Z,t_plat_admin_left_tree P

WHERE P.ID=pid AND Z.LID>=P.LID AND Z.RID <=P.RID AND (delctree = 0 OR Z.Tree<=P.Tree+delctree)

ORDER BY Z.LID ASC;

END