我是存储过程的新手,所以我可能会遗漏一些简单的东西,但我研究了基础知识,并且试图将它与 vb.net 代码集成。我创建了一个简单的存储过程(我认为),它只为今天的结果运行数据查询:
-- 例程 DDL -- 注意:例程正文前后的注释不会被服务器存储
DELIMITER $$
CREATE DEFINER=`root`@`%` PROCEDURE `GetRuntestToday`()
BEGIN
Select * From runtest.runtest_records where
Test_Date=CURDATE()
order by test_date desc, Convert(test_time_stop,DECIMAL(5,2)) desc;
END
当我登录到主 MySql 数据库并尝试从 MySql 提示符运行它时,它似乎工作正常。我只需键入call runtest.GetRuntestToday();
,它就会以命令提示符文本形式返回 59 行数据。
我编写了一个 VB.net 程序来尝试获取相同的数据,但我不断收到错误消息。错误异常详细信息是:
System.Data.Odbc.OdbcException was unhandled
ErrorCode=-2146232009
Message="ERROR [42000] [MySQL][ODBC 5.1 Driver][mysqld-5.1.51-community-log]You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'GetRuntestToday' at line 1"
Source="myodbc5.dll"
StackTrace:
at System.Data.Odbc.OdbcConnection.HandleError(OdbcHandle hrHandle, RetCode retcode)
at System.Data.Odbc.OdbcCommand.ExecuteReaderObject(CommandBehavior behavior, String method, Boolean needReader, Object[] methodArguments, SQL_API odbcApiMethod)
at System.Data.Odbc.OdbcCommand.ExecuteReaderObject(CommandBehavior behavior, String method, Boolean needReader)
at System.Data.Odbc.OdbcCommand.ExecuteReader(CommandBehavior behavior)
at System.Data.Odbc.OdbcCommand.ExecuteReader()
at MySqlHelper.mMain.DoMyStoredProcedure() in C:\vss\MySqlHelper\MySqlHelper\mMain.vb:line 2642
at MySqlHelper.mMain.Main() in C:\vss\MySqlHelper\MySqlHelper\mMain.vb:line 29
at System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args)
at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
InnerException:
我正在运行的代码是:
Public Sub DoMyStoredProcedure()
Dim MyConString As String = "My String Details"
Dim dbcRuntest As New OdbcConnection(MyConString)
Dim cmd As New OdbcCommand
Dim reader As OdbcDataReader
cmd.CommandText = "GetRuntestToday"
cmd.CommandType = CommandType.StoredProcedure
cmd.Connection = dbcRuntest
dbcRuntest.Open()
reader = cmd.ExecuteReader()
dbcRuntest.Close()
End Sub
错误发生在线:
reader = cmd.ExecuteReader()
我错过了什么?我没有看到任何语法问题,并且存储过程可以在命令提示符下运行。我已经玩了一些 DELIMITER 的东西使它//而不是 $$ 但似乎没有什么可以解决它。