我在MySQL(Server 5.5)中编写了这个程序
DELIMITER $$
DROP PROCEDURE IF EXISTS `InsertList` $$
CREATE DEFINER=`root`@`localhost` PROCEDURE `InsertList`(IN fName VARCHAR(20), IN fType VARCHAR(3), IN fFood varchar(20), Out fResult int)
BEGIN
insert into tblguest (firstname, confirm, food) values (fName, fType, fFood);
select count(id) from tblguest into fResult;
END $$
DELIMITER ;
当我从MySQL Query Browser调用此过程时,它会按预期返回
Call InsertList ('V1', 'No', 'F1', @result);
Select @result;
- >它成功返回表中id的计数
我在VB6中编写了以下代码
Dim res As Integer
On Error GoTo chkErr
Set cmd = New mand
cmd.ActiveConnection = cn
mandType = adCmdStoredProc
mandText = "InsertList"
cmd.Parameters.Append cmd.CreateParameter("fName", adVarChar, adParamInput, 20, Text3.Text)
cmd.Parameters.Append cmd.CreateParameter("fType", adVarChar, adParamInput, 3, Text2.Text)
cmd.Parameters.Append cmd.CreateParameter("fFood", adVarChar, adParamInput, 20, Text1.Text)
cmd.Parameters.Append cmd.CreateParameter("fResult", adInteger,adParamOutput)
cmd.Execute
res = cmd("fResult")
MsgBox res
Exit Sub
chkErr:
Select Case Err.Number
Case Else
Text4.Text = Err.Number & " - " & Err.Description
End Select
但是,当它尝试运行该语句时,cmd.execute它会抛出以下错误:
-2147467259 - [MySQL] [ODBC 5.1驱动程序] [mysqld-5.5.34]例程dbtest.InsertList的OUT或INOUT参数4不是BEFORE触发器中的变量或NEW伪变量
我见过用于SQL的代码,那么MySQL本身是否存在使用带有OUT参数的存储过程的问题？
