mcs/class/Mono.Data.Tds/Mono.Data.Tds.Protocol/TdsBulkCopy.cs

   1 //
   2 // Mono.Data.Tds.Protocol.TdsBulkCopy.cs
   3 //
   4 // Author:
   5 //   Nagappan A (anagappan@novell.com)
   6 //
   7 // Copyright (C) 2007 Novell Inc
   8
   9 //
  10 // Permission is hereby granted, free of charge, to any person obtaining
  11 // a copy of this software and associated documentation files (the
  12 // "Software"), to deal in the Software without restriction, including
  13 // without limitation the rights to use, copy, modify, merge, publish,
  14 // distribute, sublicense, and/or sell copies of the Software, and to
  15 // permit persons to whom the Software is furnished to do so, subject to
  16 // the following conditions:
  17 //
  18 // The above copyright notice and this permission notice shall be
  19 // included in all copies or substantial portions of the Software.
  20 //
  21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  28 //
  29 #if NET_2_0
  30 using System;
  31
  32 namespace Mono.Data.Tds.Protocol {
  33         public class TdsBulkCopy
  34         {
  35                 #region Fields
  36
  37                 Tds tds;
  38                 #endregion
  39
  40                 #region Constructors
  41
  42                 public TdsBulkCopy (Tds tds)
  43                 {
  44                         this.tds = tds;
  45                 }
  46
  47                 #endregion
  48
  49                 #region Methods
  50                 public bool SendColumnMetaData (string colMetaData)
  51                 {
  52                         tds.Comm.StartPacket (TdsPacketType.Query);
  53                         tds.Comm.Append (colMetaData);
  54                         tds.ExecBulkCopyMetaData (30, false);
  55                         return true;
  56                 }
  57
  58                 public bool BulkCopyStart (TdsMetaParameterCollection parameters)
  59                 {
  60                         tds.Comm.StartPacket (TdsPacketType.Bulk);
  61                         tds.Comm.Append ((byte) TdsPacketSubType.ColumnMetadata);
  62                         short count = 0;
  63                         foreach (TdsMetaParameter param in parameters) {
  64                                 if (param.Value != null)
  65                                         continue;
  66                                 count++;
  67                         }
  68                         tds.Comm.Append (count);
  69                         if (parameters != null) {
  70                                 foreach (TdsMetaParameter param in parameters) {
  71                                         if (param.Value != null)
  72                                                 continue;
  73                                         tds.Comm.Append ((short) 0x00);
  74                                         tds.Comm.Append ((short) 0x0a);
  75                                         WriteParameterInfo (param);
  76                                         tds.Comm.Append ((byte) param.ParameterName.Length);
  77                                         tds.Comm.Append (param.ParameterName);
  78                                 }
  79                         }
  80                         return true;
  81                 }
  82
  83                 public bool BulkCopyData (object o, int size, bool isNewRow)
  84                 {
  85                         if (isNewRow) {
  86                                 tds.Comm.Append ((byte) TdsPacketSubType.Row);
  87                         }
  88                         if (size > 0) {
  89                                 tds.Comm.Append ((short) size);
  90                         }
  91                         tds.Comm.Append (o);
  92                         return true;
  93                 }
  94
  95                 public bool BulkCopyEnd ()
  96                 {
  97                         tds.Comm.Append ((short) TdsPacketSubType.Done);
  98                         tds.ExecBulkCopy (30, false);
  99                         return true;
 100                 }
 101
 102                 private void WriteParameterInfo (TdsMetaParameter param)
 103                 {
 104                         /*
 105                         Ms.net send non-nullable datatypes as nullable and allows setting null values
 106                         to int/float etc.. So, using Nullable form of type for all data
 107                         */
 108                         param.IsNullable = true;
 109                         TdsColumnType colType = param.GetMetaType ();
 110                         param.IsNullable = false;
 111
 112                         tds.Comm.Append ((byte)colType); // type
 113
 114                         int size = 0;
 115                         if (param.Size == 0)
 116                                 size = param.GetActualSize ();
 117                         else
 118                                 size = param.Size;
 119
 120                         /*
 121                           If column type is SqlDbType.NVarChar the size of parameter is multiplied by 2
 122                           FIXME: Need to check for other types
 123                          */
 124                         if (colType == TdsColumnType.BigNVarChar)
 125                                 size <<= 1;
 126                         if (tds.IsLargeType (colType))
 127                                 tds.Comm.Append ((short)size); // Parameter size passed in SqlParameter
 128                         else if (tds.IsBlobType (colType))
 129                                 tds.Comm.Append (size); // Parameter size passed in SqlParameter
 130                         else
 131                                 tds.Comm.Append ((byte)size);
 132
 133                         // Precision and Scale are non-zero for only decimal/numeric
 134                         if ( param.TypeName == "decimal" || param.TypeName == "numeric") {
 135                                 tds.Comm.Append ((param.Precision!=0)?param.Precision:(byte)29);
 136                                 tds.Comm.Append (param.Scale);
 137                         }
 138                 }
 139                 #endregion
 140         }
 141 }
 142 #endif