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mysql存储过程递归调用产生树数据 使用finereport的树下拉框时,要求提供有层次结构的数据。例如:一级001,二级001001,三级001001001 等。而我们一般的递归表是这样的,定义一个id和一个pid,id和pid在长度上没有父子关系。这样的数据,finereport是不认的。
mysql存储过程递归调用产生树数据使用finereport的树下拉框时,要求提供有层次结构的数据。例如:一级001,二级001001,三级001001001 等。而我们一般的递归表是这样的,定义一个id和一个pid,id和pid在长度上没有父子关系。这样的数据,finereport是不认的。故只能通过存储过程进行转换。 代码如下: SET FOREIGN_KEY_CHECKS=0; -- ---------------------------- -- Table structure for `t_tlm_tree` -- ---------------------------- DROP TABLE IF EXISTS `t_tlm_tree`; CREATE TABLE `t_tlm_tree` ( `id` varchar(100) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL DEFAULT '0' , `pid` varchar(100) CHARACTER SET utf8 COLLATE utf8_unicode_ci NULL DEFAULT NULL , `nodename` varchar(200) CHARACTER SET utf8 COLLATE utf8_unicode_ci NULL DEFAULT NULL , `fast` int(11) NULL DEFAULT NULL , PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARACTER SET=utf8 COLLATE=utf8_unicode_ci ; -- ---------------------------- -- Records of t_tlm_tree -- ---------------------------- BEGIN; INSERT INTO `t_tlm_tree` VALUES ('10000', '-1', '中国', '1'), ('10001', '10000', '浙江', '1'), ('10002', '10000', '河南', '1'), ('10003', '10001', '杭州', '1'), ('10004', '10001', '温州', '1'), ('10005', '10002', '郑州', '1'), ('10006', '10002', '信阳', '1'), ('10007', '10006', '息县', '1'), ('10008', '10003', '滨江', '1'), ('10009', '10003', '西湖', '1'), ('10010', '10003', '上城', '1'), ('10011', '10006', '罗山', '1'); COMMIT; -- ---------------------------- -- Procedure structure for `p_create_tree_node` -- ---------------------------- DROP PROCEDURE IF EXISTS `p_create_tree_node`; DELIMITER ;; CREATE DEFINER=`root`@`localhost` PROCEDURE `p_create_tree_node`(IN `in_pid` varchar(100)) BEGIN DECLARE v_has_child INT default 0; DECLARE v_rows INT default 0; DECLARE v_id VARCHAR(100) default ''; DECLARE v_pid VARCHAR(100) default ''; DECLARE v_nodename VARCHAR(100) default ''; DECLARE v_tree_id VARCHAR(100) default ''; DECLARE v_tree_pid VARCHAR(100) default ''; DECLARE v_done INT default 0; DECLARE v_cur CURSOR FOR SELECT id,pid,nodename from t_tlm_tree where `fast`=1 and pid=in_pid; DECLARE CONTINUE HANDLER FOR NOT FOUND SET v_done=1; SET @@max_sp_recursion_depth = 100; OPEN v_cur; loop_tag:LOOP FETCH v_cur INTO v_id,v_pid,v_nodename; IF v_done=1 THEN LEAVE loop_tag; END IF; IF STRCMP(in_pid,'-1')=0 THEN insert into t_tlm_device_tree(id,pid,nodename,oid) values('001',null,v_nodename,v_id); ELSE select id into v_tree_pid from t_tlm_device_tree where oid = in_pid; set v_rows = v_rows+1; set v_tree_id = concat('000',v_rows); set @len = LENGTH(v_tree_id)-2; set v_tree_id = SUBSTR(v_tree_id FROM @len); set v_tree_id = concat(v_tree_pid,v_tree_id); insert into t_tlm_device_tree(id,pid,nodename,oid) values(v_tree_id,v_tree_pid,v_nodename,v_id); END IF; set v_has_child = f_has_child_by_pid(v_id); IF v_has_child =1 THEN call p_create_tree_node(v_id); END IF; END LOOP loop_tag; CLOSE v_cur; END ;; DELIMITER ; -- ---------------------------- -- Procedure structure for `p_get_device_tree` -- ---------------------------- DROP PROCEDURE IF EXISTS `p_get_device_tree`; DELIMITER ;; CREATE DEFINER=`root`@`localhost` PROCEDURE `p_get_device_tree`() BEGIN DECLARE v_pid VARCHAR(100) default '-1'; DROP TEMPORARY TABLE IF EXISTS t_tlm_device_tree; CREATE TEMPORARY TABLE t_tlm_device_tree ( id varchar(100), pid varchar(100), nodename varchar(100), oid int(100), PRIMARY KEY (id) ); call p_create_tree_node(v_pid); select * from t_tlm_device_tree; TRUNCATE TABLE t_tlm_device_tree; DROP TEMPORARY TABLE IF EXISTS t_tlm_device_tree; END ;; DELIMITER ; -- ---------------------------- -- Function structure for `f_has_child_by_pid` -- ---------------------------- DROP FUNCTION IF EXISTS `f_has_child_by_pid`; DELIMITER ;; CREATE DEFINER=`root`@`localhost` FUNCTION `f_has_child_by_pid`(`f_pid` varchar(100)) RETURNS int(11) BEGIN DECLARE v_ret int default 0; select count(1) into @num from t_tlm_tree where pid=f_pid and `fast`=1; IF @num >0 THEN set v_ret = 1; END IF; return v_ret; END ;; DELIMITER ;
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