class/Mono.Data.Tds/Mono.Data.Tds.Protocol/Tds80.cs

   1 //
   2 // Mono.Data.Tds.Protocol.Tds80.cs
   3 //
   4 // Author:
   5 //   Tim Coleman (tim@timcoleman.com)
   6 //       Veerapuram Varadhan  (vvaradhan@novell.com)
   7 //
   8 // Copyright (C) 2002 Tim Coleman
   9 // Copyright (C) 2008,2009 Novell Inc.
  10 //
  11
  12 //
  13 // Permission is hereby granted, free of charge, to any person obtaining
  14 // a copy of this software and associated documentation files (the
  15 // "Software"), to deal in the Software without restriction, including
  16 // without limitation the rights to use, copy, modify, merge, publish,
  17 // distribute, sublicense, and/or sell copies of the Software, and to
  18 // permit persons to whom the Software is furnished to do so, subject to
  19 // the following conditions:
  20 //
  21 // The above copyright notice and this permission notice shall be
  22 // included in all copies or substantial portions of the Software.
  23 //
  24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31 //
  32
  33 using Mono.Data.Tds;
  34 using System;
  35
  36 namespace Mono.Data.Tds.Protocol {
  37         public class Tds80 : Tds70
  38         {
  39                 #region Fields
  40
  41                 public static readonly TdsVersion Version = TdsVersion.tds80;
  42
  43                 #endregion // Fields
  44
  45                 #region Constructors
  46
  47                 public Tds80 (string server, int port)
  48                         : this (server, port, 512, 15)
  49                 {
  50                 }
  51
  52                 public Tds80 (string server, int port, int packetSize, int timeout)
  53                         : base (server, port, packetSize, timeout, Version)
  54                 {
  55                 }
  56
  57                 #endregion // Constructors
  58
  59                 #region Properties
  60
  61                 protected override byte[] ClientVersion {
  62                         get { return new byte[] {0x00, 0x0, 0x0, 0x71};}
  63                 }
  64                 #endregion // Properties
  65
  66                 #region Methods
  67
  68                 public override bool Connect (TdsConnectionParameters connectionParameters)
  69                 {
  70                         //Console.WriteLine ("Tds80::Connect");
  71                         return base.Connect (connectionParameters);
  72                 }
  73
  74                 protected override void ProcessColumnInfo ()
  75                 {
  76                         // We are connected to a Sql 7.0 server
  77                         if (TdsVersion < TdsVersion.tds80) {
  78                                 base.ProcessColumnInfo ();
  79                                 return;
  80                         }
  81
  82                         // VARADHAN: TDS 8 Debugging
  83                         //Console.WriteLine ("Tds80.cs: In ProcessColumnInfo... entry");
  84                         int numColumns = Comm.GetTdsShort ();
  85                         //Console.WriteLine ("Column count={0}", numColumns); TDS 8 Debugging
  86                         for (int i = 0; i < numColumns; i += 1) {
  87                                 byte[] flagData = new byte[4];
  88                                 for (int j = 0; j < 4; j += 1)
  89                                         flagData[j] = Comm.GetByte ();
  90
  91                                 bool nullable = (flagData[2] & 0x01) > 0;
  92                                 //bool caseSensitive = (flagData[2] & 0x02) > 0;
  93                                 bool writable = (flagData[2] & 0x0c) > 0;
  94                                 bool autoIncrement = (flagData[2] & 0x10) > 0;
  95                                 bool isIdentity = (flagData[2] & 0x10) > 0;
  96
  97                                 TdsColumnType columnType = (TdsColumnType) (Comm.GetByte () & 0xff);
  98                                 //Console.WriteLine ("Actual ColumnType: {0}", columnType);  TDS 8 Debugging
  99
 100                                 if ((byte) columnType == 0xef)
 101                                         columnType = TdsColumnType.NChar;
 102
 103                                 TdsColumnType xColumnType = columnType;
 104                                 if (IsLargeType (columnType)) {
 105                                         if (columnType != TdsColumnType.NChar)
 106                                                 columnType -= 128;
 107                                 }
 108
 109                                 int columnSize;
 110                                 string tableName = null;
 111                                 byte[] collation = null;
 112                                 int lcid = 0, sortId = 0;
 113
 114                                 if (IsBlobType (columnType)) {
 115                                         columnSize = Comm.GetTdsInt ();
 116                                 } else if (IsFixedSizeColumn (columnType)) {
 117                                         columnSize = LookupBufferSize (columnType);
 118                                 } else if (IsLargeType (xColumnType)) {
 119                                         columnSize = Comm.GetTdsShort ();
 120                                 } else  {
 121                                         columnSize = Comm.GetByte () & 0xff;
 122                                 }
 123
 124                                 if (xColumnType == TdsColumnType.BigChar || xColumnType == TdsColumnType.BigNVarChar ||
 125                                     xColumnType == TdsColumnType.BigVarChar || xColumnType == TdsColumnType.NChar ||
 126                                     xColumnType == TdsColumnType.NVarChar ||   xColumnType == TdsColumnType.Text ||
 127                                     xColumnType == TdsColumnType.NText) {
 128                                     // Read collation for SqlServer 2000 and beyond
 129                                     collation = Comm.GetBytes (5, true);
 130                                         lcid = TdsCollation.LCID (collation);
 131                                         sortId = TdsCollation.SortId (collation);
 132                                 }
 133
 134                                 if (IsBlobType (columnType)) {
 135                                         tableName = Comm.GetString (Comm.GetTdsShort ());
 136                                         //Console.WriteLine ("Tablename: "+tableName);  TDS 8 Debugging
 137                                 }
 138
 139                                 byte precision = 0;
 140                                 byte scale = 0;
 141
 142                                 switch (columnType) {
 143                                 case TdsColumnType.NText:
 144                                 case TdsColumnType.NChar:
 145                                 case TdsColumnType.NVarChar:
 146                                         columnSize /= 2;
 147                                         break;
 148                                 case TdsColumnType.Decimal:
 149                                 case TdsColumnType.Numeric:
 150                                         //Comm.Skip (1);
 151                                         precision = Comm.GetByte ();
 152                                         //Console.WriteLine ("Precision: {0}", precision);  TDS 8 Debugging
 153                                         scale = Comm.GetByte ();
 154                                         //Console.WriteLine ("Scale: {0}", scale);  TDS 8 Debugging
 155                                         break;
 156                                 }
 157
 158                                 string columnName = Comm.GetString (Comm.GetByte ());
 159
 160                                 TdsDataColumn col = new TdsDataColumn ();
 161                                 Columns.Add (col);
 162 #if NET_2_0
 163                                 col.ColumnType = columnType;
 164                                 col.ColumnName = columnName;
 165                                 col.IsAutoIncrement = autoIncrement;
 166                                 col.IsIdentity = isIdentity;
 167                                 col.ColumnSize = columnSize;
 168                                 col.NumericPrecision = precision;
 169                                 col.NumericScale = scale;
 170                                 col.IsReadOnly = !writable;
 171                                 col.AllowDBNull = nullable;
 172                                 col.BaseTableName = tableName;
 173                                 col.LCID = lcid;
 174                                 col.SortOrder = sortId;
 175 #else
 176                                 col ["ColumnType"] = columnType;
 177                                 col ["ColumnName"] = columnName;
 178                                 col ["IsAutoIncrement"] = autoIncrement;
 179                                 col ["IsIdentity"] = isIdentity;
 180                                 col ["ColumnSize"] = columnSize;
 181                                 col ["NumericPrecision"] = precision;
 182                                 col ["NumericScale"] = scale;
 183                                 col ["IsReadOnly"] = !writable;
 184                                 col ["AllowDBNull"] = nullable;
 185                                 col ["BaseTableName"] = tableName;
 186                                 col ["LCID"] = lcid;
 187                                 col ["SortOrder"] = sortId;
 188 #endif
 189                         }
 190                         //Console.WriteLine ("Tds80.cs: In ProcessColumnInfo... exit");  TDS 8 Debugging
 191                 }
 192
 193                 protected override void ProcessOutputParam ()
 194                 {
 195                         // We are connected to a Sql 7.0 server
 196                         if (TdsVersion < TdsVersion.tds80) {
 197                                 base.ProcessOutputParam ();
 198                                 return;
 199                         }
 200
 201                         GetSubPacketLength ();
 202
 203                         Comm.Skip ((Comm.GetByte () & 0xff) <<1); // Parameter name
 204                         Comm.Skip (1);  // Status: 0x01 - in case of OUTPUT parameter
 205                                                         // Status: 0x02 - in case of return value of UDF
 206                         Comm.Skip (4);  // Usertype - sizeof (ULong)
 207
 208                         TdsColumnType colType = (TdsColumnType) Comm.GetByte ();
 209                         object value = GetColumnValue (colType, true);
 210                         OutputParameters.Add (value);
 211                 }
 212
 213                 #endregion // Methods
 214         }
 215 }