我正在尝试使用以下代码以编程方式创建新的存储过程:
using (MySqlConnection conn = new MySqlConnection(connectionString))
{
conn.Open();
using (MySqlTransaction trans = conn.BeginTransaction())
{
using (MySqlCommand command = conn.CreateCommand())
{
command.CommandText = query;
command.ExecuteNonQuery();
}
trans.Commit();
}
}
以下文本作为从Mysql workbench复制的create语句:
static string query = @"
delimiter $$
CREATE PROCEDURE `GetParentIds`(IN `tempTableName` VARCHAR(255), IN `id` int)
BEGIN
DECLARE parId INT;
DECLARE curId INT;
DROP TEMPORARY TABLE IF EXISTS tempTableName;
CREATE TEMPORARY TABLE tempTableName (
node_id INT NOT NULL PRIMARY KEY
);
set curId := id;
get_parents_loop: LOOP
set parId := null;
set parId = (select ParentID from {TableName} where ID = curId);
IF parId is NULL THEN
LEAVE get_parents_loop;
END IF;
INSERT INTO tempTableName(node_id) Values (parId);
set curId := parId;
END LOOP get_parents_loop;
SELECT *
FROM tempTableName;
END$$";
此过程传递一个具有parentID的对象的ID,它获取给定对象的所有父项的所有parentID并返回它们。当我尝试运行它并且收到以下消息时出现问题: “您的SQL语法有错误;请查看与您的MySQL服务器版本对应的手册,以便在'delimiter $$'附近使用正确的语法
CREATE PROCEDURE GetParentIds
(IN tempTableName
VARCHAR(255),'第1行'
欢迎任何和所有想法!
*编辑** 感谢下面的所有答案,这就是最终的工作:
CREATE PROCEDURE GetParentIds(IN tempTableName VARCHAR(255), IN id int)
BEGIN
DECLARE parId INT;
DECLARE curId INT;
DROP TEMPORARY TABLE IF EXISTS tempTableName;
CREATE TEMPORARY TABLE tempTableName (node_id INT NOT NULL PRIMARY KEY );
set curId := id;
get_parents_loop: LOOP
set parId := null;
set parId = (select ParentID from TDOs where TDOID = curId);
IF parId is NULL THEN
LEAVE get_parents_loop;
END IF;
INSERT INTO tempTableName(node_id) Values (parId);
set curId := parId;
END LOOP get_parents_loop;
SELECT *
FROM tempTableName;
END;
答案 0 :(得分:5)
在开始时移除DELIMITER $$
,在最后$$
END
DELIMITER
是 mysql客户端命令,使您可以在定义存储例程时临时更改其语句终止符。
如果要在不使用分号作为语句终止符的编程接口中定义存储例程,则存储例程定义中的分号不会出现任何特殊问题。
答案 1 :(得分:-1)
静态字符串查询= @"
CREATE PROCEDURE ZGetParentIds(IN tempTableName VARCHAR(255),IN id int) 开始 DECLARE parId INT; DECLARE curId INT;
DROP TEMPORARY TABLE IF EXISTS tempTableName;
CREATE TEMPORARY TABLE tempTableName(node_id INT NOT NULL PRIMARY KEY);
set curId := id;
get_parents_loop: LOOP
set parId := null;
set parId = (select ParentID from TDOs where TDOID = curId);
IF parId is NULL THEN
LEAVE get_parents_loop;
END IF;
INSERT INTO tempTableName(node_id) Values (parId);
set curId := parId;
END LOOP get_parents_loop; 选择 * FROM tempTableName; END&#34 ;;