mcs/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                 protected override byte Precision {
  65                         get { return 38; }
  66                 }
  67
  68                 #endregion // Properties
  69
  70                 #region Methods
  71
  72                 public override bool Connect (TdsConnectionParameters connectionParameters)
  73                 {
  74                         //Console.WriteLine ("Tds80::Connect");
  75                         return base.Connect (connectionParameters);
  76                 }
  77
  78                 protected override void ProcessColumnInfo ()
  79                 {
  80                         // We are connected to a Sql 7.0 server
  81                         if (TdsVersion < TdsVersion.tds80) {
  82                                 base.ProcessColumnInfo ();
  83                                 return;
  84                         }
  85
  86                         // VARADHAN: TDS 8 Debugging
  87                         //Console.WriteLine ("Tds80.cs: In ProcessColumnInfo... entry");
  88                         int numColumns = Comm.GetTdsShort ();
  89                         //Console.WriteLine ("Column count={0}", numColumns); TDS 8 Debugging
  90                         for (int i = 0; i < numColumns; i += 1) {
  91                                 byte[] flagData = new byte[4];
  92                                 for (int j = 0; j < 4; j += 1)
  93                                         flagData[j] = Comm.GetByte ();
  94
  95                                 bool nullable = (flagData[2] & 0x01) > 0;
  96                                 //bool caseSensitive = (flagData[2] & 0x02) > 0;
  97                                 bool writable = (flagData[2] & 0x0c) > 0;
  98                                 bool autoIncrement = (flagData[2] & 0x10) > 0;
  99                                 bool isIdentity = (flagData[2] & 0x10) > 0;
 100
 101                                 TdsColumnType columnType = (TdsColumnType) (Comm.GetByte () & 0xff);
 102                                 //Console.WriteLine ("Actual ColumnType: {0}", columnType);  TDS 8 Debugging
 103
 104                                 if ((byte) columnType == 0xef)
 105                                         columnType = TdsColumnType.NChar;
 106
 107                                 TdsColumnType xColumnType = columnType;
 108                                 if (IsLargeType (columnType)) {
 109                                         if (columnType != TdsColumnType.NChar)
 110                                                 columnType -= 128;
 111                                 }
 112
 113                                 int columnSize;
 114                                 string tableName = null;
 115                                 byte[] collation = null;
 116                                 int lcid = 0, sortId = 0;
 117
 118                                 if (IsBlobType (columnType)) {
 119                                         columnSize = Comm.GetTdsInt ();
 120                                 } else if (IsFixedSizeColumn (columnType)) {
 121                                         columnSize = LookupBufferSize (columnType);
 122                                 } else if (IsLargeType (xColumnType)) {
 123                                         columnSize = Comm.GetTdsShort ();
 124                                 } else  {
 125                                         columnSize = Comm.GetByte () & 0xff;
 126                                 }
 127
 128                                 if (xColumnType == TdsColumnType.BigChar || xColumnType == TdsColumnType.BigNVarChar ||
 129                                     xColumnType == TdsColumnType.BigVarChar || xColumnType == TdsColumnType.NChar ||
 130                                     xColumnType == TdsColumnType.NVarChar ||   xColumnType == TdsColumnType.Text ||
 131                                     xColumnType == TdsColumnType.NText) {
 132                                     // Read collation for SqlServer 2000 and beyond
 133                                     collation = Comm.GetBytes (5, true);
 134                                         lcid = TdsCollation.LCID (collation);
 135                                         sortId = TdsCollation.SortId (collation);
 136                                 }
 137
 138                                 if (IsBlobType (columnType)) {
 139                                         tableName = Comm.GetString (Comm.GetTdsShort ());
 140                                         //Console.WriteLine ("Tablename: "+tableName);  TDS 8 Debugging
 141                                 }
 142
 143                                 byte precision = 0;
 144                                 byte scale = 0;
 145
 146                                 switch (columnType) {
 147                                 case TdsColumnType.NText:
 148                                 case TdsColumnType.NChar:
 149                                 case TdsColumnType.NVarChar:
 150                                         columnSize /= 2;
 151                                         break;
 152                                 case TdsColumnType.Decimal:
 153                                 case TdsColumnType.Numeric:
 154                                         //Comm.Skip (1);
 155                                         precision = Comm.GetByte ();
 156                                         //Console.WriteLine ("Precision: {0}", precision);  TDS 8 Debugging
 157                                         scale = Comm.GetByte ();
 158                                         //Console.WriteLine ("Scale: {0}", scale);  TDS 8 Debugging
 159                                         break;
 160                                 }
 161
 162                                 string columnName = Comm.GetString (Comm.GetByte ());
 163
 164                                 TdsDataColumn col = new TdsDataColumn ();
 165                                 Columns.Add (col);
 166 #if NET_2_0
 167                                 col.ColumnType = columnType;
 168                                 col.ColumnName = columnName;
 169                                 col.IsAutoIncrement = autoIncrement;
 170                                 col.IsIdentity = isIdentity;
 171                                 col.ColumnSize = columnSize;
 172                                 col.NumericPrecision = precision;
 173                                 col.NumericScale = scale;
 174                                 col.IsReadOnly = !writable;
 175                                 col.AllowDBNull = nullable;
 176                                 col.BaseTableName = tableName;
 177                                 col.LCID = lcid;
 178                                 col.SortOrder = sortId;
 179 #else
 180                                 col ["ColumnType"] = columnType;
 181                                 col ["ColumnName"] = columnName;
 182                                 col ["IsAutoIncrement"] = autoIncrement;
 183                                 col ["IsIdentity"] = isIdentity;
 184                                 col ["ColumnSize"] = columnSize;
 185                                 col ["NumericPrecision"] = precision;
 186                                 col ["NumericScale"] = scale;
 187                                 col ["IsReadOnly"] = !writable;
 188                                 col ["AllowDBNull"] = nullable;
 189                                 col ["BaseTableName"] = tableName;
 190                                 col ["LCID"] = lcid;
 191                                 col ["SortOrder"] = sortId;
 192 #endif
 193                         }
 194                         //Console.WriteLine ("Tds80.cs: In ProcessColumnInfo... exit");  TDS 8 Debugging
 195                 }
 196
 197                 protected override void ProcessOutputParam ()
 198                 {
 199                         // We are connected to a Sql 7.0 server
 200                         if (TdsVersion < TdsVersion.tds80) {
 201                                 base.ProcessOutputParam ();
 202                                 return;
 203                         }
 204
 205                         GetSubPacketLength ();
 206
 207                         Comm.Skip ((Comm.GetByte () & 0xff) <<1); // Parameter name
 208                         Comm.Skip (1);  // Status: 0x01 - in case of OUTPUT parameter
 209                                                         // Status: 0x02 - in case of return value of UDF
 210                         Comm.Skip (4);  // Usertype - sizeof (ULong)
 211
 212                         TdsColumnType colType = (TdsColumnType) Comm.GetByte ();
 213                         object value = GetColumnValue (colType, true);
 214                         OutputParameters.Add (value);
 215                 }
 216
 217                 public override void Execute (string commandText, TdsMetaParameterCollection parameters, int timeout, bool wantResults)
 218                 {
 219                         // We are connected to a Sql 7.0 server
 220                         if (TdsVersion < TdsVersion.tds80) {
 221                                 base.Execute (commandText, parameters, timeout, wantResults);
 222                                 return;
 223                         }
 224
 225                         Parameters = parameters;
 226                         string sql = commandText;
 227
 228                         if (Parameters != null && Parameters.Count > 0) {
 229                                 ExecRPC (TdsRpcProcId.ExecuteSql, commandText, parameters, timeout, wantResults);
 230                         } else {
 231                                 if (wantResults)
 232                                         sql = BuildExec (commandText);
 233                                 ExecuteQuery (sql, timeout, wantResults);
 234                         }
 235                 }
 236
 237                 public override void ExecPrepared (string commandText, TdsMetaParameterCollection parameters, int timeout, bool wantResults)
 238                 {
 239                         Parameters = parameters;
 240                         // We are connected to a Sql 7.0 server
 241                         if (TdsVersion < TdsVersion.tds80 ||
 242                             Parameters == null || Parameters.Count < 1) {
 243                                 base.ExecPrepared (commandText, parameters, timeout, wantResults);
 244                                 return;
 245                         }
 246                         TdsMetaParameterCollection parms = new TdsMetaParameterCollection ();
 247                         parms.Add (new TdsMetaParameter ("@Handle", "int", Int32.Parse (commandText)));
 248                         foreach (TdsMetaParameter parm in Parameters)
 249                                 parms.Add (parm);
 250
 251                         ExecRPC ("sp_execute", parms, timeout, wantResults);
 252                 }
 253
 254                 #endregion // Methods
 255         }
 256 }