MYSQL命令可以上传到数据库的最大查询是什么？

Question

我想上传大约300KB到一个长文本，我不断收到以下错误。 我正在使用MYSQL .NET连接器上传到我的数据库。 我试图从3ds模型上传文件作为文本，所以它有很多无法识别的ASCII字符，如果这有所作为。

这是我上传功能：

public void Upload(string queue) 
     { 
      MySqlCon.Open(); 
      MySqlCommand command = MySqlCon.CreateCommand(); 
      command.CommandText = queue; 
      command.ExecuteNonQuery(); 
      MySqlCon.Close(); 


     } 

而且这是林呼：

string FBXQuery = "UPDATE 'itemmodel' SET 'modelFile'='" + FBX + "' 
WHERE 'modelName'='" + txt_Name.Text + "'; "; 
      SQL.Upload(FBXQuery); 

以下是错误：

System.Transactions Critical: 0 : <TraceRecord xmlns="http://schemas.microsoft.com/2004/10/E2ETraceEvent/TraceRecord" Severity="Critical"><TraceIdentifier>http://msdn.microsoft.com/TraceCodes/System/ActivityTracing/2004/07/Reliability/Exception/Unhandled</TraceIdentifier><Description>Unhandled exception</Description><AppDomain>Item Manager.vshost.exe</AppDomain><Exception><ExceptionType>MySql.Data.MySqlClient.MySqlException, MySql.Data, Version=6.4.4.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d</ExceptionType><Message>Fatal error encountered during command execution.</Message><StackTrace> at MySql.Data.MySqlClient.MySqlCommand.ExecuteReader(CommandBehavior behavior) 
    at MySql.Data.MySqlClient.MySqlCommand.ExecuteNonQuery() 
    at Item_Manager.MYSQL.Upload(String queue) in C:\Users\Administrator\Documents\Visual Studio 2008\Projects\Item Manager\Item Manager\MYSQL.cs:line 187 
    at Item_Manager.NewItem.btn_Upload_Click(Object sender, EventArgs e) in C:\Users\Administrator\Documents\Visual Studio 2008\Projects\Item Manager\Item Manager\NewItem.cs:line 64 
    at System.Windows.Forms.Control.OnClick(EventArgs e) 
    at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent) 
    at System.Windows.Forms.Control.WmMouseUp(Message&amp;amp; m, MouseButtons button, Int32 clicks) 
    at System.Windows.Forms.Control.WndProc(Message&amp;amp; m) 
    at System.Windows.Forms.ButtonBase.WndProc(Message&amp;amp; m) 
    at System.Windows.Forms.Button.WndProc(Message&amp;amp; m) 
    at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message&amp;amp; m) 
    at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) 
    at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG&amp;amp; msg) 
    at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData) 
    at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context) 
    at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context) 
    at System.Windows.Forms.Form.ShowDialog(IWin32Window owner) 
    at Item_Manager.Form1.newItemToolStripMenuItem_Click(Object sender, EventArgs e) in C:\Users\Administrator\Documents\Visual Studio 2008\Projects\Item Manager\Item Manager\Form1.cs:line 81 
    at System.Windows.Forms.ToolStripItem.RaiseEvent(Object key, EventArgs e) 
    at System.Windows.Forms.ToolStripMenuItem.OnClick(EventArgs e) 
    at System.Windows.Forms.ToolStripItem.HandleClick(EventArgs e) 
    at System.Windows.Forms.ToolStripItem.HandleMouseUp(MouseEventArgs e) 
    at System.Windows.Forms.ToolStrip.OnMouseUp(MouseEventArgs mea) 
    at System.Windows.Forms.ToolStripDropDown.OnMouseUp(MouseEventArgs mea) 
    at System.Windows.Forms.Control.WmMouseUp(Message&amp;amp; m, MouseButtons button, Int32 clicks) 
    at System.Windows.Forms.Control.WndProc(Message&amp;amp; m) 
    at System.Windows.Forms.ToolStrip.WndProc(Message&amp;amp; m) 
    at System.Windows.Forms.ToolStripDropDown.WndProc(Message&amp;amp; m) 
    at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message&amp;amp; m) 
    at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) 
    at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG&amp;amp; msg) 
    at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData) 
    at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context) 
    at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context) 
    at Item_Manager.Program.Main() in C:\Users\Administrator\Documents\Visual Studio 2008\Projects\Item Manager\Item Manager\Program.cs:line 18 
    at System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args) 
    at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly() 
    at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) 
    at System.Threading.ThreadHelper.ThreadStart()</StackTrace><ExceptionString>MySql.Data.MySqlClient.MySqlException: Fatal error encountered during command execution. ---&amp;gt; MySql.Data.MySqlClient.MySqlException: Parameter '?' must be defined. 
    at MySql.Data.MySqlClient.Statement.SerializeParameter(MySqlParameterCollection parameters, MySqlPacket packet, String parmName) 
    at MySql.Data.MySqlClient.Statement.InternalBindParameters(String sql, MySqlParameterCollection parameters, MySqlPacket packet) 
    at MySql.Data.MySqlClient.Statement.BindParameters() 
    at MySql.Data.MySqlClient.PreparableStatement.Execute() 
    at MySql.Data.MySqlClient.MySqlCommand.ExecuteReader(CommandBehavior behavior) 
    --- End of inner exception stack trace --- 
    at MySql.Data.MySqlClient.MySqlCommand.ExecuteReader(CommandBehavior behavior) 
    at MySql.Data.MySqlClient.MySqlCommand.ExecuteNonQuery() 
    at Item_Manager.MYSQL.Upload(String queue) in C:\Users\Administrator\Documents\Visual Studio 2008\Projects\Item Manager\Item Manager\MYSQL.cs:line 187 
    at Item_Manager.NewItem.btn_Upload_Click(Object sender, EventArgs e) in C:\Users\Administrator\Documents\Visual Studio 2008\Projects\Item Manager\Item Manager\NewItem.cs:line 64 
    at System.Windows.Forms.Control.OnClick(EventArgs e) 
    at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent) 
    at System.Windows.Forms.Control.WmMouseUp(Message&amp;amp; m, MouseButtons button, Int32 clicks) 
    at System.Windows.Forms.Control.WndProc(Message&amp;amp; m) 
    at System.Windows.Forms.ButtonBase.WndProc(Message&amp;amp; m) 
    at System.Windows.Forms.Button.WndProc(Message&amp;amp; m) 
    at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message&amp;amp; m) 
    at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) 
    at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG&amp;amp; msg) 
    at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData) 
    at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context) 
    at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context) 
    at System.Windows.Forms.Form.ShowDialog(IWin32Window owner) 
    at Item_Manager.Form1.newItemToolStripMenuItem_Click(Object sender, EventArgs e) in C:\Users\Administrator\Documents\Visual Studio 2008\Projects\Item Manager\Item Manager\Form1.cs:line 81 
    at System.Windows.Forms.ToolStripItem.RaiseEvent(Object key, EventArgs e) 
    at System.Windows.Forms.ToolStripMenuItem.OnClick(EventArgs e) 
    at System.Windows.Forms.ToolStripItem.HandleClick(EventArgs e) 
    at System.Windows.Forms.ToolStripItem.HandleMouseUp(MouseEventArgs e) 
    at System.Windows.Forms.ToolStrip.OnMouseUp(MouseEventArgs mea) 
    at System.Windows.Forms.ToolStripDropDown.OnMouseUp(MouseEventArgs mea) 
    at System.Windows.Forms.Control.WmMouseUp(Message&amp;amp; m, MouseButtons button, Int32 clicks) 
    at System.Windows.Forms.Control.WndProc(Message&amp;amp; m) 
    at System.Windows.Forms.ToolStrip.WndProc(Message&amp;amp; m) 
    at System.Windows.Forms.ToolStripDropDown.WndProc(Message&amp;amp; m) 
    at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message&amp;amp; m) 
    at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) 
    at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG&amp;amp; msg) 
    at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData) 
    at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context) 
    at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context) 
    at Item_Manager.Program.Main() in C:\Users\Administrator\Documents\Visual Studio 2008\Projects\Item Manager\Item Manager\Program.cs:line 18 
    at System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args) 
    at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly() 
    at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) 
    at System.Threading.ThreadHelper.ThreadStart()</ExceptionString><InnerException><ExceptionType>MySql.Data.MySqlClient.MySqlException, MySql.Data, Version=6.4.4.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d</ExceptionType><Message>Parameter '?' must be defined.</Message><StackTrace> at MySql.Data.MySqlClient.Statement.SerializeParameter(MySqlParameterCollection parameters, MySqlPacket packet, String parmName) 
    at MySql.Data.MySqlClient.Statement.InternalBindParameters(String sql, MySqlParameterCollection parameters, MySqlPacket packet) 
    at MySql.Data.MySqlClient.Statement.BindParameters() 
    at MySql.Data.MySqlClient.PreparableStatement.Execute() 
    at MySql.Data.MySqlClient.MySqlCommand.ExecuteReader(CommandBehavior behavior)</StackTrace><ExceptionString>MySql.Data.MySqlClient.MySqlException: Parameter '?' must be defined. 
    at MySql.Data.MySqlClient.Statement.SerializeParameter(MySqlParameterCollection parameters, MySqlPacket packet, String parmName) 
    at MySql.Data.MySqlClient.Statement.InternalBindParameters(String sql, MySqlParameterCollection parameters, MySqlPacket packet) 
    at MySql.Data.MySqlClient.Statement.BindParameters() 
    at MySql.Data.MySqlClient.PreparableStatement.Execute() 
    at MySql.Data.MySqlClient.MySqlCommand.ExecuteReader(CommandBehavior behavior)</ExceptionString></InnerException></Exception></TraceRecord> 

Answer 1

我相信，这是关系到max_allowed_packet配置变量 - 理论上它可以高达1GB，但可能设置得比这低得多。

http://dev.mysql.com/doc/refman/5.5/en/packet-too-large.html

http://dev.mysql.com/doc/refman/5.5/en/server-system-variables.html#sysvar_max_allowed_packet