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160 lines
4.4 KiB
160 lines
4.4 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.Data;
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using MySql.Data.MySqlClient;
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using System.Globalization;
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namespace MySql.Data.Types
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{
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internal struct MySqlInt32 : IMySqlValue
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{
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private int mValue;
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private bool isNull;
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private bool is24Bit;
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private MySqlInt32(MySqlDbType type)
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{
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is24Bit = type == MySqlDbType.Int24 ? true : false;
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isNull = true;
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mValue = 0;
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}
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public MySqlInt32(MySqlDbType type, bool isNull)
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: this(type)
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{
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this.isNull = isNull;
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}
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public MySqlInt32(MySqlDbType type, int val)
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: this(type)
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{
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this.isNull = false;
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mValue = val;
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}
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#region IMySqlValue Members
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public bool IsNull
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{
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get { return isNull; }
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}
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MySqlDbType IMySqlValue.MySqlDbType
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{
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get { return MySqlDbType.Int32; }
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}
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DbType IMySqlValue.DbType
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{
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get { return DbType.Int32; }
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}
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object IMySqlValue.Value
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{
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get { return mValue; }
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}
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public int Value
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{
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get { return mValue; }
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}
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Type IMySqlValue.SystemType
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{
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get { return typeof(Int32); }
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}
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string IMySqlValue.MySqlTypeName
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{
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get { return is24Bit ? "MEDIUMINT" : "INT"; }
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}
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void IMySqlValue.WriteValue(MySqlPacket packet, bool binary, object val, int length)
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{
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int v = (val is Int32) ? (int)val : Convert.ToInt32(val);
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if (binary)
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packet.WriteInteger((long)v, is24Bit ? 3 : 4);
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else
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packet.WriteStringNoNull(v.ToString());
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}
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IMySqlValue IMySqlValue.ReadValue(MySqlPacket packet, long length, bool nullVal)
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{
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if (nullVal)
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return new MySqlInt32((this as IMySqlValue).MySqlDbType, true);
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if (length == -1)
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return new MySqlInt32((this as IMySqlValue).MySqlDbType,
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packet.ReadInteger(4));
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else
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return new MySqlInt32((this as IMySqlValue).MySqlDbType,
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Int32.Parse(packet.ReadString(length),
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CultureInfo.InvariantCulture));
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}
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void IMySqlValue.SkipValue(MySqlPacket packet)
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{
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packet.Position += 4;
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}
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#endregion
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internal static void SetDSInfo(DataTable dsTable)
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{
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string[] types = new string[] { "INT", "YEAR", "MEDIUMINT" };
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MySqlDbType[] dbtype = new MySqlDbType[] { MySqlDbType.Int32,
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MySqlDbType.Year, MySqlDbType.Int24 };
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// we use name indexing because this method will only be called
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// when GetSchema is called for the DataSourceInformation
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// collection and then it wil be cached.
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for (int x = 0; x < types.Length; x++)
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{
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DataRow row = dsTable.NewRow();
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row["TypeName"] = types[x];
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row["ProviderDbType"] = dbtype[x];
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row["ColumnSize"] = 0;
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row["CreateFormat"] = types[x];
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row["CreateParameters"] = null;
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row["DataType"] = "System.Int32";
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row["IsAutoincrementable"] = dbtype[x] == MySqlDbType.Year ? false : true;
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row["IsBestMatch"] = true;
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row["IsCaseSensitive"] = false;
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row["IsFixedLength"] = true;
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row["IsFixedPrecisionScale"] = true;
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row["IsLong"] = false;
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row["IsNullable"] = true;
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row["IsSearchable"] = true;
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row["IsSearchableWithLike"] = false;
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row["IsUnsigned"] = false;
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row["MaximumScale"] = 0;
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row["MinimumScale"] = 0;
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row["IsConcurrencyType"] = DBNull.Value;
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row["IsLiteralSupported"] = false;
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row["LiteralPrefix"] = null;
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row["LiteralSuffix"] = null;
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row["NativeDataType"] = null;
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dsTable.Rows.Add(row);
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}
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}
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}
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}
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