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880 lines
30 KiB
880 lines
30 KiB
// Copyright (c) 2004-2008 MySQL AB, 2008-2009 Sun Microsystems, Inc.
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License version 2 as published by
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// the Free Software Foundation
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//
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// There are special exceptions to the terms and conditions of the GPL
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// as it is applied to this software. View the full text of the
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// exception in file EXCEPTIONS in the directory of this software
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// distribution.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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using System;
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using System.Collections;
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using System.Diagnostics;
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using System.IO;
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using MySql.Data.Common;
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using MySql.Data.Types;
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using System.Security.Cryptography.X509Certificates;
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using MySql.Data.MySqlClient.Properties;
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using System.Text;
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#if !CF
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using System.Net.Security;
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using System.Security.Authentication;
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using System.Globalization;
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using System.Text;
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#endif
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namespace MySql.Data.MySqlClient
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{
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/// <summary>
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/// Summary description for Driver.
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/// </summary>
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internal class NativeDriver : IDriver
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{
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private DBVersion version;
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private int threadId;
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protected String encryptionSeed;
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protected ServerStatusFlags serverStatus;
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protected MySqlStream stream;
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protected Stream baseStream;
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private BitArray nullMap;
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private MySqlPacket packet;
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private ClientFlags connectionFlags;
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private Driver owner;
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private int warnings;
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public NativeDriver(Driver owner)
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{
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this.owner = owner;
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threadId = -1;
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}
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public ClientFlags Flags
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{
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get { return connectionFlags; }
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}
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public int ThreadId
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{
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get { return threadId; }
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}
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public DBVersion Version
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{
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get { return version; }
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}
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public ServerStatusFlags ServerStatus
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{
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get { return serverStatus; }
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}
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public int WarningCount
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{
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get { return warnings; }
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}
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public MySqlPacket Packet
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{
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get { return packet; }
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}
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private MySqlConnectionStringBuilder Settings
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{
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get { return owner.Settings; }
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}
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private Encoding Encoding
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{
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get { return owner.Encoding; }
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}
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private void HandleException(MySqlException ex)
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{
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if (ex.IsFatal)
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owner.Close();
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}
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private void ReadOk(bool read)
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{
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try
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{
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if (read)
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packet = stream.ReadPacket();
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byte marker = (byte) packet.ReadByte();
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if (marker != 0)
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throw new MySqlException("Out of sync with server", true, null);
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packet.ReadFieldLength(); /* affected rows */
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packet.ReadFieldLength(); /* last insert id */
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if (packet.HasMoreData)
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{
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serverStatus = (ServerStatusFlags) packet.ReadInteger(2);
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packet.ReadInteger(2); /* warning count */
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if (packet.HasMoreData)
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{
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packet.ReadLenString(); /* message */
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}
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}
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}
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catch (MySqlException ex)
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{
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HandleException(ex);
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throw;
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}
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}
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/// <summary>
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/// Sets the current database for the this connection
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/// </summary>
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/// <param name="dbName"></param>
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public void SetDatabase(string dbName)
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{
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byte[] dbNameBytes = Encoding.GetBytes(dbName);
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packet.Clear();
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packet.WriteByte((byte)DBCmd.INIT_DB);
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packet.Write(dbNameBytes);
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ExecutePacket(packet);
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ReadOk(true);
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}
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public void Configure()
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{
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stream.MaxPacketSize = (ulong)owner.MaxPacketSize;
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stream.Encoding = Encoding;
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}
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public void Open()
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{
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// connect to one of our specified hosts
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try
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{
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#if !CF
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if (Settings.ConnectionProtocol == MySqlConnectionProtocol.SharedMemory)
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{
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SharedMemoryStream str = new SharedMemoryStream(Settings.SharedMemoryName);
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str.Open(Settings.ConnectionTimeout);
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baseStream = str;
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}
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else
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{
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#endif
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string pipeName = Settings.PipeName;
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if (Settings.ConnectionProtocol != MySqlConnectionProtocol.NamedPipe)
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pipeName = null;
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StreamCreator sc = new StreamCreator(Settings.Server, Settings.Port, pipeName,
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Settings.Keepalive);
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baseStream = sc.GetStream(Settings.ConnectionTimeout);
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#if !CF
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}
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#endif
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}
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catch (Exception ex)
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{
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throw new MySqlException(Resources.UnableToConnectToHost,
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(int) MySqlErrorCode.UnableToConnectToHost, ex);
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}
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if (baseStream == null)
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throw new MySqlException(Resources.UnableToConnectToHost,
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(int)MySqlErrorCode.UnableToConnectToHost);
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int maxSinglePacket = 255*255*255;
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stream = new MySqlStream(baseStream, Encoding, false);
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stream.ResetTimeout((int)Settings.ConnectionTimeout*1000);
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// read off the welcome packet and parse out it's values
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packet = stream.ReadPacket();
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int protocol = packet.ReadByte();
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string versionString = packet.ReadString();
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version = DBVersion.Parse(versionString);
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if (!version.isAtLeast(4, 1, 1))
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throw new NotSupportedException(Resources.ServerTooOld);
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threadId = packet.ReadInteger(4);
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encryptionSeed = packet.ReadString();
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maxSinglePacket = (256*256*256) - 1;
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// read in Server capabilities if they are provided
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ClientFlags serverCaps = 0;
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if (packet.HasMoreData)
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serverCaps = (ClientFlags) packet.ReadInteger(2);
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/* New protocol with 16 bytes to describe server characteristics */
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owner.ConnectionCharSetIndex = (int)packet.ReadByte();
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serverStatus = (ServerStatusFlags) packet.ReadInteger(2);
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packet.Position += 13;
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string seedPart2 = packet.ReadString();
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encryptionSeed += seedPart2;
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// based on our settings, set our connection flags
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SetConnectionFlags(serverCaps);
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packet.Clear();
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packet.WriteInteger((int) connectionFlags, 4);
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#if !CF
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if ((serverCaps & ClientFlags.SSL) ==0)
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{
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if ((Settings.SslMode != MySqlSslMode.None)
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&& (Settings.SslMode != MySqlSslMode.Preferred))
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{
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// Client requires SSL connections.
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string message = String.Format(Resources.NoServerSSLSupport,
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Settings.Server);
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throw new MySqlException(message);
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}
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}
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else if (Settings.SslMode != MySqlSslMode.None)
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{
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stream.SendPacket(packet);
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StartSSL();
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packet.Clear();
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packet.WriteInteger((int) connectionFlags, 4);
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}
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#endif
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packet.WriteInteger(maxSinglePacket, 4);
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packet.WriteByte(8);
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packet.Write(new byte[23]);
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Authenticate();
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// if we are using compression, then we use our CompressedStream class
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// to hide the ugliness of managing the compression
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if ((connectionFlags & ClientFlags.COMPRESS) != 0)
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stream = new MySqlStream(baseStream, Encoding, true);
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// give our stream the server version we are connected to.
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// We may have some fields that are read differently based
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// on the version of the server we are connected to.
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packet.Version = version;
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stream.MaxBlockSize = maxSinglePacket;
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}
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#if !CF
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#region SSL
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/// <summary>
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/// Retrieve client SSL certificates. Dependent on connection string
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/// settings we use either file or store based certificates.
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/// </summary>
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private X509CertificateCollection GetClientCertificates()
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{
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X509CertificateCollection certs = new X509CertificateCollection();
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// Check for file-based certificate
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if (Settings.CertificateFile != null)
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{
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X509Certificate2 clientCert = new X509Certificate2(Settings.CertificateFile,
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Settings.CertificatePassword);
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certs.Add(clientCert);
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return certs;
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}
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if (Settings.CertificateStoreLocation == MySqlCertificateStoreLocation.None)
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return certs;
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StoreLocation location =
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(Settings.CertificateStoreLocation == MySqlCertificateStoreLocation.CurrentUser) ?
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StoreLocation.CurrentUser : StoreLocation.LocalMachine;
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// Check for store-based certificate
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X509Store store = new X509Store(StoreName.My, location);
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store.Open(OpenFlags.ReadOnly | OpenFlags.OpenExistingOnly);
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if (Settings.CertificateThumbprint == null)
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{
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// Return all certificates from the store.
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certs.AddRange(store.Certificates);
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return certs;
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}
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// Find certificate with given thumbprint
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certs.AddRange(store.Certificates.Find(X509FindType.FindByThumbprint,
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Settings.CertificateThumbprint, true));
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if (certs.Count == 0)
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{
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throw new MySqlException("Certificate with Thumbprint " +
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Settings.CertificateThumbprint + " not found");
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}
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return certs;
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}
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private void StartSSL()
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{
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RemoteCertificateValidationCallback sslValidateCallback =
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new RemoteCertificateValidationCallback(ServerCheckValidation);
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SslStream ss = new SslStream(baseStream, true, sslValidateCallback, null);
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X509CertificateCollection certs = GetClientCertificates();
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ss.AuthenticateAsClient(Settings.Server, certs, SslProtocols.Default, false);
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baseStream = ss;
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stream = new MySqlStream(ss, Encoding, false);
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stream.SequenceByte = 2;
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}
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private bool ServerCheckValidation(object sender, X509Certificate certificate,
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X509Chain chain, SslPolicyErrors sslPolicyErrors)
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{
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if (sslPolicyErrors == SslPolicyErrors.None)
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return true;
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if (Settings.SslMode == MySqlSslMode.Preferred ||
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Settings.SslMode == MySqlSslMode.Required)
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{
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//Tolerate all certificate errors.
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return true;
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}
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if (Settings.SslMode == MySqlSslMode.VerifyCA &&
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sslPolicyErrors == SslPolicyErrors.RemoteCertificateNameMismatch)
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{
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// Tolerate name mismatch in certificate, if full validation is not requested.
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return true;
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}
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return false;
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}
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#endregion
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#endif
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#region Authentication
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/// <summary>
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/// Return the appropriate set of connection flags for our
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/// server capabilities and our user requested options.
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/// </summary>
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private void SetConnectionFlags(ClientFlags serverCaps)
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{
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// allow load data local infile
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ClientFlags flags = ClientFlags.LOCAL_FILES;
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if (!Settings.UseAffectedRows)
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flags |= ClientFlags.FOUND_ROWS;
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flags |= ClientFlags.PROTOCOL_41;
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// Need this to get server status values
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flags |= ClientFlags.TRANSACTIONS;
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// user allows/disallows batch statements
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if (Settings.AllowBatch)
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flags |= ClientFlags.MULTI_STATEMENTS;
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// We always allow multiple result sets
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flags |= ClientFlags.MULTI_RESULTS;
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// if the server allows it, tell it that we want long column info
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if ((serverCaps & ClientFlags.LONG_FLAG) != 0)
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flags |= ClientFlags.LONG_FLAG;
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// if the server supports it and it was requested, then turn on compression
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if ((serverCaps & ClientFlags.COMPRESS) != 0 && Settings.UseCompression)
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flags |= ClientFlags.COMPRESS;
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flags |= ClientFlags.LONG_PASSWORD; // for long passwords
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// did the user request an interactive session?
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if (Settings.InteractiveSession)
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flags |= ClientFlags.INTERACTIVE;
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// if the server allows it and a database was specified, then indicate
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// that we will connect with a database name
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if ((serverCaps & ClientFlags.CONNECT_WITH_DB) != 0 &&
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Settings.Database != null && Settings.Database.Length > 0)
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flags |= ClientFlags.CONNECT_WITH_DB;
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// if the server is requesting a secure connection, then we oblige
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if ((serverCaps & ClientFlags.SECURE_CONNECTION) != 0)
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flags |= ClientFlags.SECURE_CONNECTION;
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// if the server is capable of SSL and the user is requesting SSL
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if ((serverCaps & ClientFlags.SSL) != 0 && Settings.SslMode != MySqlSslMode.None)
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flags |= ClientFlags.SSL;
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// if the server supports output parameters, then we do too
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//if ((serverCaps & ClientFlags.PS_MULTI_RESULTS) != 0)
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flags |= ClientFlags.PS_MULTI_RESULTS;
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connectionFlags = flags;
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}
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/// <summary>
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/// Perform an authentication against a 4.1.1 server
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/// </summary>
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private void AuthenticateNew()
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{
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if ((connectionFlags & ClientFlags.SECURE_CONNECTION) == 0)
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AuthenticateOld();
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packet.Write(Crypt.Get411Password(Settings.Password, encryptionSeed));
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if ((connectionFlags & ClientFlags.CONNECT_WITH_DB) != 0 && Settings.Database != null)
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packet.WriteString(Settings.Database);
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stream.SendPacket(packet);
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// this result means the server wants us to send the password using
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// old encryption
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packet = stream.ReadPacket();
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if (packet.IsLastPacket)
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{
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packet.Clear();
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packet.WriteString(Crypt.EncryptPassword(
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Settings.Password, encryptionSeed.Substring(0, 8), true));
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stream.SendPacket(packet);
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ReadOk(true);
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}
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else
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ReadOk(false);
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}
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private void AuthenticateOld()
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{
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packet.WriteString(Crypt.EncryptPassword(
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Settings.Password, encryptionSeed, true));
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if ((connectionFlags & ClientFlags.CONNECT_WITH_DB) != 0 && Settings.Database != null)
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packet.WriteString(Settings.Database);
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stream.SendPacket(packet);
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ReadOk(true);
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}
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public void Authenticate()
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{
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// write the user id to the auth packet
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packet.WriteString(Settings.UserID);
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AuthenticateNew();
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}
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#endregion
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public void Reset()
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{
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warnings = 0;
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stream.SequenceByte = 0;
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packet.Clear();
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packet.WriteByte((byte)DBCmd.CHANGE_USER);
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Authenticate();
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}
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/// <summary>
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/// Query is the method that is called to send all queries to the server
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/// </summary>
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public void SendQuery(MySqlPacket queryPacket)
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{
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warnings = 0;
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queryPacket.Buffer[4] = (byte)DBCmd.QUERY;
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ExecutePacket(queryPacket);
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// the server will respond in one of several ways with the first byte indicating
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// the type of response.
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// 0 == ok packet. This indicates non-select queries
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// 0xff == error packet. This is handled in stream.OpenPacket
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// > 0 = number of columns in select query
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// We don't actually read the result here since a single query can generate
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// multiple resultsets and we don't want to duplicate code. See ReadResult
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// Instead we set our internal server status flag to indicate that we have a query waiting.
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// This flag will be maintained by ReadResult
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serverStatus |= ServerStatusFlags.AnotherQuery;
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}
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public void Close(bool isOpen)
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{
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try
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{
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if (isOpen)
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{
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try
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{
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packet.Clear();
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packet.WriteByte((byte)DBCmd.QUIT);
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ExecutePacket(packet);
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}
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catch (Exception)
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{
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// Eat exception here. We should try to closing
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// the stream anyway.
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}
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}
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if (stream != null)
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stream.Close();
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stream = null;
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}
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catch (Exception)
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{
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// we are just going to eat any exceptions
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// generated here
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}
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}
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public bool Ping()
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{
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try
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{
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packet.Clear();
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packet.WriteByte((byte)DBCmd.PING);
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ExecutePacket(packet);
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ReadOk(true);
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return true;
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}
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catch (Exception)
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{
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return false;
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}
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}
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public int GetResult(ref int affectedRow, ref int insertedId)
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{
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try
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{
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packet = stream.ReadPacket();
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}
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catch (TimeoutException)
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{
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// Do not reset serverStatus, allow to reenter, e.g when
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// ResultSet is closed.
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throw;
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}
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catch (Exception)
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{
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serverStatus = 0;
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throw;
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}
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int fieldCount = (int)packet.ReadFieldLength();
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if (-1 == fieldCount)
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{
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string filename = packet.ReadString();
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SendFileToServer(filename);
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return GetResult(ref affectedRow, ref insertedId);
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}
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else if (fieldCount == 0)
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{
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// the code to read last packet will set these server status vars
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// again if necessary.
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serverStatus &= ~(ServerStatusFlags.AnotherQuery |
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ServerStatusFlags.MoreResults);
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affectedRow = (int)packet.ReadFieldLength();
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insertedId = (int)packet.ReadFieldLength();
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serverStatus = (ServerStatusFlags)packet.ReadInteger(2);
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warnings += packet.ReadInteger(2);
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if (packet.HasMoreData)
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{
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packet.ReadLenString(); //TODO: server message
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}
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}
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return fieldCount;
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|
}
|
|
|
|
/// <summary>
|
|
/// Sends the specified file to the server.
|
|
/// This supports the LOAD DATA LOCAL INFILE
|
|
/// </summary>
|
|
/// <param name="filename"></param>
|
|
private void SendFileToServer(string filename)
|
|
{
|
|
byte[] buffer = new byte[8196];
|
|
|
|
long len = 0;
|
|
try
|
|
{
|
|
using (FileStream fs = new FileStream(filename, FileMode.Open,
|
|
FileAccess.Read))
|
|
{
|
|
len = fs.Length;
|
|
while (len > 0)
|
|
{
|
|
int count = fs.Read(buffer, 4, (int)(len > 8192 ? 8192 : len));
|
|
stream.SendEntirePacketDirectly(buffer, count);
|
|
len -= count;
|
|
}
|
|
stream.SendEntirePacketDirectly(buffer, 0);
|
|
}
|
|
}
|
|
catch (Exception ex)
|
|
{
|
|
throw new MySqlException("Error during LOAD DATA LOCAL INFILE", ex);
|
|
}
|
|
}
|
|
|
|
private void ReadNullMap(int fieldCount)
|
|
{
|
|
// if we are binary, then we need to load in our null bitmap
|
|
nullMap = null;
|
|
byte[] nullMapBytes = new byte[(fieldCount + 9)/8];
|
|
packet.ReadByte();
|
|
packet.Read(nullMapBytes, 0, nullMapBytes.Length);
|
|
nullMap = new BitArray(nullMapBytes);
|
|
}
|
|
|
|
public IMySqlValue ReadColumnValue(int index, MySqlField field, IMySqlValue valObject)
|
|
{
|
|
long length = -1;
|
|
bool isNull;
|
|
|
|
if (nullMap != null)
|
|
isNull = nullMap[index + 2];
|
|
else
|
|
{
|
|
length = packet.ReadFieldLength();
|
|
isNull = length == -1;
|
|
}
|
|
|
|
packet.Encoding = field.Encoding;
|
|
packet.Version = version;
|
|
return valObject.ReadValue(packet, length, isNull);
|
|
}
|
|
|
|
public void SkipColumnValue(IMySqlValue valObject)
|
|
{
|
|
int length = -1;
|
|
if (nullMap == null)
|
|
{
|
|
length = packet.ReadFieldLength();
|
|
if (length == -1) return;
|
|
}
|
|
if (length > -1)
|
|
packet.Position += length;
|
|
else
|
|
valObject.SkipValue(packet);
|
|
}
|
|
|
|
public void GetColumnsData(MySqlField[] columns)
|
|
{
|
|
for (int i = 0; i < columns.Length; i++)
|
|
GetColumnData(columns[i]);
|
|
ReadEOF();
|
|
}
|
|
|
|
private void GetColumnData(MySqlField field)
|
|
{
|
|
stream.Encoding = Encoding;
|
|
packet = stream.ReadPacket();
|
|
field.Encoding = Encoding;
|
|
field.CatalogName = packet.ReadLenString();
|
|
field.DatabaseName = packet.ReadLenString();
|
|
field.TableName = packet.ReadLenString();
|
|
field.RealTableName = packet.ReadLenString();
|
|
field.ColumnName = packet.ReadLenString();
|
|
field.OriginalColumnName = packet.ReadLenString();
|
|
packet.ReadByte();
|
|
field.CharacterSetIndex = packet.ReadInteger(2);
|
|
field.ColumnLength = packet.ReadInteger(4);
|
|
MySqlDbType type = (MySqlDbType)packet.ReadByte();
|
|
ColumnFlags colFlags;
|
|
if ((connectionFlags & ClientFlags.LONG_FLAG) != 0)
|
|
colFlags = (ColumnFlags)packet.ReadInteger(2);
|
|
else
|
|
colFlags = (ColumnFlags)packet.ReadByte();
|
|
field.Scale = (byte)packet.ReadByte();
|
|
|
|
if (packet.HasMoreData)
|
|
{
|
|
packet.ReadInteger(2); // reserved
|
|
}
|
|
|
|
if (type == MySqlDbType.Decimal || type == MySqlDbType.NewDecimal)
|
|
{
|
|
field.Precision = (byte)(field.ColumnLength - (int)field.Scale);
|
|
if ((colFlags & ColumnFlags.UNSIGNED) != 0)
|
|
field.Precision++;
|
|
}
|
|
|
|
field.SetTypeAndFlags(type, colFlags);
|
|
}
|
|
|
|
private void ExecutePacket(MySqlPacket packetToExecute)
|
|
{
|
|
try
|
|
{
|
|
warnings = 0;
|
|
stream.SequenceByte = 0;
|
|
stream.SendPacket(packetToExecute);
|
|
}
|
|
catch (MySqlException ex)
|
|
{
|
|
HandleException(ex);
|
|
throw;
|
|
}
|
|
}
|
|
|
|
public void ExecuteStatement(MySqlPacket packetToExecute)
|
|
{
|
|
warnings = 0;
|
|
packetToExecute.Buffer[4] = (byte)DBCmd.EXECUTE;
|
|
ExecutePacket(packetToExecute);
|
|
serverStatus |= ServerStatusFlags.AnotherQuery;
|
|
}
|
|
|
|
private void CheckEOF()
|
|
{
|
|
if (!packet.IsLastPacket)
|
|
throw new MySqlException("Expected end of data packet");
|
|
|
|
packet.ReadByte(); // read off the 254
|
|
|
|
if (packet.HasMoreData)
|
|
{
|
|
warnings += packet.ReadInteger(2);
|
|
serverStatus = (ServerStatusFlags)packet.ReadInteger(2);
|
|
|
|
// if we are at the end of this cursor based resultset, then we remove
|
|
// the last row sent status flag so our next fetch doesn't abort early
|
|
// and we remove this command result from our list of active CommandResult objects.
|
|
// if ((serverStatus & ServerStatusFlags.LastRowSent) != 0)
|
|
// {
|
|
// serverStatus &= ~ServerStatusFlags.LastRowSent;
|
|
// commandResults.Remove(lastCommandResult);
|
|
// }
|
|
}
|
|
}
|
|
|
|
private void ReadEOF()
|
|
{
|
|
packet = stream.ReadPacket();
|
|
CheckEOF();
|
|
}
|
|
|
|
public int PrepareStatement(string sql, ref MySqlField[] parameters)
|
|
{
|
|
//TODO: check this
|
|
//ClearFetchedRow();
|
|
|
|
packet.Length = sql.Length*4 + 5;
|
|
byte[] buffer = packet.Buffer;
|
|
int len = Encoding.GetBytes(sql, 0, sql.Length, packet.Buffer, 5);
|
|
packet.Position = len + 5;
|
|
buffer[4] = (byte)DBCmd.PREPARE;
|
|
ExecutePacket(packet);
|
|
|
|
packet = stream.ReadPacket();
|
|
|
|
int marker = packet.ReadByte();
|
|
if (marker != 0)
|
|
throw new MySqlException("Expected prepared statement marker");
|
|
|
|
int statementId = packet.ReadInteger(4);
|
|
int numCols = packet.ReadInteger(2);
|
|
int numParams = packet.ReadInteger(2);
|
|
//TODO: find out what this is needed for
|
|
packet.ReadInteger(3);
|
|
if (numParams > 0)
|
|
{
|
|
parameters = owner.GetColumns(numParams);
|
|
// we set the encoding for each parameter back to our connection encoding
|
|
// since we can't trust what is coming back from the server
|
|
for (int i = 0; i < parameters.Length; i++)
|
|
parameters[i].Encoding = Encoding;
|
|
}
|
|
|
|
if (numCols > 0)
|
|
{
|
|
while (numCols-- > 0)
|
|
{
|
|
packet = stream.ReadPacket();
|
|
//TODO: handle streaming packets
|
|
}
|
|
|
|
ReadEOF();
|
|
}
|
|
|
|
return statementId;
|
|
}
|
|
|
|
// private void ClearFetchedRow()
|
|
// {
|
|
// if (lastCommandResult == 0) return;
|
|
|
|
//TODO
|
|
/* CommandResult result = (CommandResult)commandResults[lastCommandResult];
|
|
result.ReadRemainingColumns();
|
|
|
|
stream.OpenPacket();
|
|
if (! stream.IsLastPacket)
|
|
throw new MySqlException("Cursor reading out of sync");
|
|
|
|
ReadEOF(false);
|
|
lastCommandResult = 0;*/
|
|
// }
|
|
|
|
/// <summary>
|
|
/// FetchDataRow is the method that the data reader calls to see if there is another
|
|
/// row to fetch. In the non-prepared mode, it will simply read the next data packet.
|
|
/// In the prepared mode (statementId > 0), it will
|
|
/// </summary>
|
|
public bool FetchDataRow(int statementId, int columns)
|
|
{
|
|
/* ClearFetchedRow();
|
|
|
|
if (!commandResults.ContainsKey(statementId)) return false;
|
|
|
|
if ( (serverStatus & ServerStatusFlags.LastRowSent) != 0)
|
|
return false;
|
|
|
|
stream.StartPacket(9, true);
|
|
stream.WriteByte((byte)DBCmd.FETCH);
|
|
stream.WriteInteger(statementId, 4);
|
|
stream.WriteInteger(1, 4);
|
|
stream.Flush();
|
|
|
|
lastCommandResult = statementId;
|
|
*/
|
|
packet = stream.ReadPacket();
|
|
if (packet.IsLastPacket)
|
|
{
|
|
CheckEOF();
|
|
return false;
|
|
}
|
|
nullMap = null;
|
|
if (statementId > 0)
|
|
ReadNullMap(columns);
|
|
|
|
return true;
|
|
}
|
|
|
|
public void CloseStatement(int statementId)
|
|
{
|
|
packet.Clear();
|
|
packet.WriteByte((byte)DBCmd.CLOSE_STMT);
|
|
packet.WriteInteger((long)statementId, 4);
|
|
stream.SequenceByte = 0;
|
|
stream.SendPacket(packet);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Execution timeout, in milliseconds. When the accumulated time for network IO exceeds this value
|
|
/// TimeoutException is thrown. This timeout needs to be reset for every new command
|
|
/// </summary>
|
|
///
|
|
public void ResetTimeout(int timeout)
|
|
{
|
|
if (stream != null)
|
|
stream.ResetTimeout(timeout);
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|