#if MYSQL_6_9 // Copyright � 2004, 2011, Oracle and/or its affiliates. All rights reserved. // // MySQL Connector/NET is licensed under the terms of the GPLv2 // , like most // MySQL Connectors. There are special exceptions to the terms and // conditions of the GPLv2 as it is applied to this software, see the // FLOSS License Exception // . // // This program is free software; you can redistribute it and/or modify // it under the terms of the GNU General Public License as published // by the Free Software Foundation; version 2 of the License. // // This program is distributed in the hope that it will be useful, but // WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY // or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License // for more details. // // You should have received a copy of the GNU General Public License along // with this program; if not, write to the Free Software Foundation, Inc., // 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA using System; using System.Collections; using System.IO; using System.Text; using Externals.MySql.Data.Common; using System.Data; using Externals.MySql.Data.MySqlClient.Properties; using System.Collections.Generic; namespace Externals.MySql.Data.MySqlClient { internal abstract class Statement { protected MySqlCommand command; protected string commandText; private List buffers; private Statement(MySqlCommand cmd) { command = cmd; buffers = new List(); } public Statement(MySqlCommand cmd, string text) : this(cmd) { commandText = text; } #region Properties public virtual string ResolvedCommandText { get { return commandText; } } protected Driver Driver { get { return command.Connection.driver; } } protected MySqlConnection Connection { get { return command.Connection; } } protected MySqlParameterCollection Parameters { get { return command.Parameters; } } #endregion public virtual void Close(MySqlDataReader reader) { } public virtual void Resolve(bool preparing) { } public virtual void Execute() { // we keep a reference to this until we are done BindParameters(); ExecuteNext(); } public virtual bool ExecuteNext() { if (buffers.Count == 0) return false; MySqlPacket packet = (MySqlPacket)buffers[0]; //MemoryStream ms = stream.InternalBuffer; Driver.SendQuery(packet); buffers.RemoveAt(0); return true; } protected virtual void BindParameters() { MySqlParameterCollection parameters = command.Parameters; int index = 0; while (true) { InternalBindParameters(ResolvedCommandText, parameters, null); // if we are not batching, then we are done. This is only really relevant the // first time through if (command.Batch == null) return; while (index < command.Batch.Count) { MySqlCommand batchedCmd = command.Batch[index++]; MySqlPacket packet = (MySqlPacket)buffers[buffers.Count - 1]; // now we make a guess if this statement will fit in our current stream long estimatedCmdSize = batchedCmd.EstimatedSize(); if (((packet.Length - 4) + estimatedCmdSize) > Connection.driver.MaxPacketSize) { // it won't, so we setup to start a new run from here parameters = batchedCmd.Parameters; break; } // looks like we might have room for it so we remember the current end of the stream buffers.RemoveAt(buffers.Count - 1); //long originalLength = packet.Length - 4; // and attempt to stream the next command string text = ResolvedCommandText; if (text.StartsWith("(", StringComparison.Ordinal)) packet.WriteStringNoNull(", "); else packet.WriteStringNoNull("; "); InternalBindParameters(text, batchedCmd.Parameters, packet); if ((packet.Length - 4) > Connection.driver.MaxPacketSize) { //TODO //stream.InternalBuffer.SetLength(originalLength); parameters = batchedCmd.Parameters; break; } } if (index == command.Batch.Count) return; } } private void InternalBindParameters(string sql, MySqlParameterCollection parameters, MySqlPacket packet) { bool sqlServerMode = command.Connection.Settings.SqlServerMode; if (packet == null) { packet = new MySqlPacket(Driver.Encoding); packet.Version = Driver.Version; packet.WriteByte(0); } MySqlTokenizer tokenizer = new MySqlTokenizer(sql); tokenizer.ReturnComments = true; tokenizer.SqlServerMode = sqlServerMode; int pos = 0; string token = tokenizer.NextToken(); int parameterCount = 0; while (token != null) { // serialize everything that came before the token (i.e. whitespace) packet.WriteStringNoNull(sql.Substring(pos, tokenizer.StartIndex - pos)); pos = tokenizer.StopIndex; if (MySqlTokenizer.IsParameter(token)) { if ((!parameters.containsUnnamedParameters && token.Length == 1 && parameterCount > 0) || parameters.containsUnnamedParameters && token.Length > 1) throw new MySqlException(Resources.MixedParameterNamingNotAllowed); parameters.containsUnnamedParameters = token.Length == 1; if (SerializeParameter(parameters, packet, token, parameterCount)) token = null; parameterCount++; } if (token != null) { if (sqlServerMode && tokenizer.Quoted && token.StartsWith("[", StringComparison.Ordinal)) token = String.Format("`{0}`", token.Substring(1, token.Length - 2)); packet.WriteStringNoNull(token); } token = tokenizer.NextToken(); } buffers.Add(packet); } protected virtual bool ShouldIgnoreMissingParameter(string parameterName) { if (Connection.Settings.AllowUserVariables) return true; if (parameterName.StartsWith("@" + StoredProcedure.ParameterPrefix, StringComparison.OrdinalIgnoreCase)) return true; if (parameterName.Length > 1 && (parameterName[1] == '`' || parameterName[1] == '\'')) return true; return false; } /// /// Serializes the given parameter to the given memory stream /// /// /// This method is called by PrepareSqlBuffers to convert the given /// parameter to bytes and write those bytes to the given memory stream. /// /// /// True if the parameter was successfully serialized, false otherwise. private bool SerializeParameter(MySqlParameterCollection parameters, MySqlPacket packet, string parmName, int parameterIndex) { MySqlParameter parameter = null; if (!parameters.containsUnnamedParameters) parameter = parameters.GetParameterFlexible(parmName, false); else { if (parameterIndex <= parameters.Count) parameter = parameters[parameterIndex]; else throw new MySqlException(Resources.ParameterIndexNotFound); } if (parameter == null) { // if we are allowing user variables and the parameter name starts with @ // then we can't throw an exception if (parmName.StartsWith("@", StringComparison.Ordinal) && ShouldIgnoreMissingParameter(parmName)) return false; throw new MySqlException( String.Format(Resources.ParameterMustBeDefined, parmName)); } parameter.Serialize(packet, false, Connection.Settings); return true; } } } #endif