1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
|
//
// OdbcTypeMap.cs : Mapping between different odbc types
//
// Author:
// Sureshkumar T <tsureshkumar@novell.com>
//
//
// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
//
// * Type mapping between various odbc driver types.
// For further infomartion between these mapping visit following msdn site
//
// * http://msdn.microsoft.com/library/default.asp?url=/library/en-us/odbc/htm/
// odbcc_data_types.asp
// * http://msdn.microsoft.com/library/default.asp?url=/library/en-us/odbc/htm/
// odbcconverting_data_from_c_to_sql_data_types.asp
// * http://msdn.microsoft.com/library/default.asp?url=/library/en-us/odbc/htm/
// odbcconverting_data_from_sql_to_c_data_types.asp
// * http://msdn.microsoft.com/library/default.asp?url=/library/en-us/odbc/htm/
// odbcparameter_data_types.asp
// * http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/
// html/frlrfsystemdataodbcodbctypeclasstopic.asp
//
//
// OdbcType SQL_C_TYPE SQL_TYPE
// ===================================================================
// BigInt SQL_C_TYPE.SBIGINT SQL_TYPE.BIGINT
// Binary SQL_C_TYPE.BINARY SQL_TYPE.BINARY
// Bit SQL_C_TYPE.BIT SQL_TYPE.BIT
// Char SQL_C_TYPE.CHAR SQL_TYPE.CHAR
// Date SQL_C_TYPE.TYPE_DATE SQL_TYPE.TYPE_DATE
// DateTime SQL_C_TYPE.TIMESTAMP SQL_TYPE.TIMESTAMP
// Decimal SQL_C_TYPE.NUMERIC SQL_TYPE.NUMERIC
// Double SQL_C_TYPE.DOUBLE SQL_TYPE.DOUBLE
// Image SQL_C_TYPE.BINARY SQL_TYPE.BINARY
// Int SQL_C_TYPE.LONG SQL_TYPE.INTEGER
// NChar SQL_C_TYPE.WCHAR SQL_TYPE.WCHAR
// NText SQL_C_TYPE.WCHAR SQL_TYPE.WLONGVARCHAR
// Numeric SQL_C_TYPE.NUMERIC SQL_TYPE.NUMERIC
// NVarChar SQL_C_TYPE.WCHAR SQL_TYPE.WVARCHAR
// Real SQL_C_TYPE.FLOAT SQL_TYPE.REAL
// SignedBigInt SQL_C_TYPE.SBIGINT SQL_TYPE.BIGINT
// SmallDateTime SQL_C_TYPE.TIMESTAMP SQL_TYPE.TIMESTAMP
// SmallInt SQL_C_TYPE.SHORT SQL_TYPE.SMALLINT
// Text SQL_C_TYPE.WCHAR SQL_TYPE.LONGVARCHAR
// Time SQL_C_TYPE.TYPE_TIME SQL_TYPE.TYPE_TIME
// Timestamp SQL_C_TYPE.BINARY SQL_TYPE.BINARY
// TinyInt SQL_C_TYPE.UTINYINT SQL_TYPE.TINYINT
// UniqueIdentifier SQL_C_TYPE.GUID SQL_TYPE.GUID
// VarBinary SQL_C_TYPE.BINARY SQL_TYPE.VARBINARY
// VarChar SQL_C_TYPE.WCHAR SQL_TYPE.WVARCHAR
//====================================================================
using System.Data;
using System.Collections;
using System.Data.Common;
namespace System.Data.Odbc
{
internal struct OdbcTypeMap
{
public DbType DbType;
public OdbcType OdbcType;
public SQL_C_TYPE NativeType;
public SQL_TYPE SqlType;
private static Hashtable maps = new Hashtable ();
public OdbcTypeMap (DbType dbType, OdbcType odbcType,
SQL_C_TYPE nativeType, SQL_TYPE sqlType)
{
DbType = dbType;
OdbcType = odbcType;
SqlType = sqlType;
NativeType = nativeType;
}
public static Hashtable Maps {
get { return maps; }
}
static OdbcTypeMap ()
{
maps [OdbcType.BigInt] = new OdbcTypeMap (DbType.Int64,
OdbcType.BigInt,
SQL_C_TYPE.SBIGINT,
SQL_TYPE.BIGINT);
maps [OdbcType.Binary] = new OdbcTypeMap (DbType.Binary,
OdbcType.Binary,
SQL_C_TYPE.BINARY,
SQL_TYPE.BINARY);
maps [OdbcType.Bit] = new OdbcTypeMap (DbType.Boolean,
OdbcType.Bit,
SQL_C_TYPE.BIT,
SQL_TYPE.BIT);
maps [OdbcType.Char] = new OdbcTypeMap (DbType.String,
OdbcType.Char,
SQL_C_TYPE.CHAR,
SQL_TYPE.CHAR);
maps [OdbcType.Date] = new OdbcTypeMap (DbType.Date,
OdbcType.Date,
SQL_C_TYPE.DATE,
SQL_TYPE.DATE);
maps [OdbcType.DateTime] = new OdbcTypeMap (DbType.DateTime,
OdbcType.DateTime,
SQL_C_TYPE.TIMESTAMP,
SQL_TYPE.TIMESTAMP);
maps [OdbcType.Decimal] = new OdbcTypeMap (DbType.Decimal,
OdbcType.Decimal,
SQL_C_TYPE.NUMERIC,
SQL_TYPE.NUMERIC);
maps [OdbcType.Double] = new OdbcTypeMap (DbType.Double,
OdbcType.Double,
SQL_C_TYPE.DOUBLE,
SQL_TYPE.DOUBLE);
maps [OdbcType.Image] = new OdbcTypeMap (DbType.Binary,
OdbcType.Image,
SQL_C_TYPE.BINARY,
SQL_TYPE.BINARY);
maps [OdbcType.Int] = new OdbcTypeMap (DbType.Int32,
OdbcType.Int,
SQL_C_TYPE.LONG,
SQL_TYPE.INTEGER);
maps [OdbcType.NChar] = new OdbcTypeMap (DbType.String,
OdbcType.NChar,
SQL_C_TYPE.CHAR, //change
SQL_TYPE.CHAR); //change
maps [OdbcType.NText] = new OdbcTypeMap (DbType.String,
OdbcType.NText,
SQL_C_TYPE.CHAR, // change
SQL_TYPE.LONGVARCHAR); //change
// Currently, NUMERIC types works only with NUMERIC SQL Type to CHAR C Type mapping (pgsql). Other databases return
// SQL_TYPE.DECIMAL in place of numeric types.
maps [OdbcType.Numeric] = new OdbcTypeMap (DbType.Decimal,
OdbcType.Numeric,
SQL_C_TYPE.CHAR,
SQL_TYPE.NUMERIC);
maps [OdbcType.NVarChar] = new OdbcTypeMap (DbType.String,
OdbcType.NVarChar,
SQL_C_TYPE.CHAR, // change
SQL_TYPE.VARCHAR); //change
maps [OdbcType.Real] = new OdbcTypeMap (DbType.Single,
OdbcType.Real,
SQL_C_TYPE.FLOAT,
SQL_TYPE.REAL);
maps [OdbcType.SmallDateTime] = new OdbcTypeMap (DbType.DateTime,
OdbcType.SmallDateTime,
SQL_C_TYPE.TIMESTAMP,
SQL_TYPE.TIMESTAMP);
maps [OdbcType.SmallInt] = new OdbcTypeMap (DbType.Int16,
OdbcType.SmallInt,
SQL_C_TYPE.SHORT,
SQL_TYPE.SMALLINT);
maps [OdbcType.Text] = new OdbcTypeMap (DbType.String,
OdbcType.Text,
SQL_C_TYPE.CHAR, //change
SQL_TYPE.LONGVARCHAR);
maps [OdbcType.Time] = new OdbcTypeMap (DbType.DateTime,
OdbcType.Time,
SQL_C_TYPE.TIME,
SQL_TYPE.TIME);
maps [OdbcType.Timestamp] = new OdbcTypeMap (DbType.DateTime,
OdbcType.Timestamp,
SQL_C_TYPE.BINARY,
SQL_TYPE.BINARY);
maps [OdbcType.TinyInt] = new OdbcTypeMap (DbType.SByte,
OdbcType.TinyInt,
SQL_C_TYPE.UTINYINT,
SQL_TYPE.TINYINT);
maps [OdbcType.UniqueIdentifier] = new OdbcTypeMap (DbType.Guid,
OdbcType.UniqueIdentifier,
SQL_C_TYPE.GUID,
SQL_TYPE.GUID);
maps [OdbcType.VarBinary] = new OdbcTypeMap (DbType.Binary,
OdbcType.VarBinary,
SQL_C_TYPE.BINARY,
SQL_TYPE.VARBINARY);
maps [OdbcType.VarChar] = new OdbcTypeMap (DbType.String,
OdbcType.VarChar,
SQL_C_TYPE.CHAR,
SQL_TYPE.VARCHAR);
}
}
}
|
