Datei: Provider/SqliteProvider/NDO.Sqlite/Provider.cs

Last Commit (e9b343b)
1 //
2 // Copyright (c) 2002-2019 Mirko Matytschak
3 // (www.netdataobjects.de)
4 //
5 // Author: Mirko Matytschak
6 //
7 // Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
8 // documentation files (the "Software"), to deal in the Software without restriction, including without limitation
9 // the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
10 // Software, and to permit persons to whom the Software is furnished to do so, subject to the following
11 // conditions:
12
13 // The above copyright notice and this permission notice shall be included in all copies or substantial portions
14 // of the Software.
15 //
16 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
17 // TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
19 // CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
20 // DEALINGS IN THE SOFTWARE.
21
22
23 using System;
24 using System.Text;
25 using System.Reflection;
26 using System.Data;
27 using System.Data.Common;
28 using NDOInterfaces;
29
30 using System.Data.SQLite;
31 using System.IO;
32
33 namespace System.Data.SQLite
34 {
35 ····public enum SQLiteDbType
36 ····{
37 ········Text,
38 ········Numeric,
39 ········Integer,
40 ········Decimal,
41 ········Int2,
42 ········Real,
43 ········Datetime,
44 ········Blob,
45 ········Guid
46 ····}
47 }
48
49 namespace NDO.SqliteProvider
50 {
51 ····/// <summary>
52 ····/// Sample adapter class to connect new ADO.NET Providers with NDO.
53 ····/// This Adapter is based on the SQLite SQLite Data Connector
54 ····/// </summary>
55 ····public class Provider : NDOAbstractProvider
56 ····{
57 ········public Provider()
58 ········{
59 ········}
60
61 ········// The following methods provide objects of provider classes
62 ········// which implement common interfaces in .NET:
63 ········// IDbConnection, IDbCommand, DbDataAdapter and the Parameter objects
64 ········#region Provide specialized type objects
65 ········public override System.Data.IDbConnection NewConnection(string connectionString)
66 ········{
67 ············return new SQLiteConnection(connectionString);
68 ········}
69
70 ········public override System.Data.IDbCommand NewSqlCommand(System.Data.IDbConnection connection)
71 ········{
72 ············SQLiteCommand command = new SQLiteCommand();
73 ············command.Connection = (SQLiteConnection)connection;
74 ············return command;
75 ········}
76
77 ········public override DbDataAdapter NewDataAdapter(System.Data.IDbCommand select, System.Data.IDbCommand update, System.Data.IDbCommand insert, System.Data.IDbCommand delete)
78 ········{
79 ············SQLiteDataAdapter da = new SQLiteDataAdapter();
80 ············da.SelectCommand = (SQLiteCommand)select;
81 ············da.UpdateCommand = (SQLiteCommand)update;
82 ············da.InsertCommand = (SQLiteCommand)insert;
83 ············da.DeleteCommand = (SQLiteCommand)delete;
84 ············return da;
85 ········}
86
87 ········/// <summary>
88 ········/// See <see cref="IProvider"> IProvider interface </see>
89 ········/// </summary>
90 ········public override object NewCommandBuilder(DbDataAdapter dataAdapter)
91 ········{
92 ············return new SQLiteCommandBuilder((SQLiteDataAdapter)dataAdapter);
93 ········}
94
95
96 ········public override IDataParameter AddParameter(IDbCommand command, string parameterName, object odbType, int size, string columnName)
97 ········{
98 ············DbType dbType = GetDbTypeFromSqliteDbType( (SQLiteDbType) odbType );
99 ············SQLiteParameter result = new SQLiteParameter( parameterName, dbType, size, columnName );
100 ············((SQLiteCommand)command).Parameters.Add(result);
101 ············return result;
102 ········}
103
104 ········public override IDataParameter AddParameter(IDbCommand command, string parameterName, object odbType, int size, ParameterDirection dir, bool isNullable, byte precision, byte scale, string srcColumn, DataRowVersion srcVersion, object value)
105 ········{
106 ············DbType dbType = GetDbTypeFromSqliteDbType( (SQLiteDbType) odbType );
107 ············SQLiteParameter result = new SQLiteParameter( parameterName, dbType, size, dir, isNullable, precision, scale, srcColumn, srcVersion, value );
108 ············((SQLiteCommand)command).Parameters.Add(result);
109 ············return result;
110 ········}
111
112 ········private DbType GetDbTypeFromSqliteDbType( SQLiteDbType sqliteDbType )
113 ········{
114 ············switch ( sqliteDbType )
115 ············{
116 ················case SQLiteDbType.Text:
117 ····················return DbType.String;
118 ················case SQLiteDbType.Numeric:
119 ····················return DbType.VarNumeric;
120 ················case SQLiteDbType.Integer:
121 ····················return DbType.Int32;
122 ················case SQLiteDbType.Int2:
123 ····················return DbType.Int16;
124 ················case SQLiteDbType.Decimal:
125 ····················return DbType.Decimal;
126 ················case SQLiteDbType.Real:
127 ····················return DbType.Double;
128 ················case SQLiteDbType.Datetime:
129 ····················return DbType.DateTime;
130 ················case SQLiteDbType.Blob:
131 ····················return DbType.Binary;
132 ················case SQLiteDbType.Guid:
133 ····················return DbType.String;
134 ············}
135 ············return DbType.String;
136 ········}
137
138 ········#endregion
139
140 ········// The following method convert System.Type objects to SQLiteDbType-Members
141 ········// For your own adapter use members of the database type emumeration
142 ········// of your ADO.NET provider
143 ········#region Provide SQLiteDbType members
144 ········public override object GetDbType(Type t)
145 ········{
146 ············t = base.ConvertNullableType(t);
147 ············return GetInternalDbType( t );
148 ········}
149
150 ········internal static SQLiteDbType GetInternalDbType( Type t )
151 ········{
152 ············if ( t == typeof( bool ) )
153 ················return SQLiteDbType.Int2;
154 ············else if ( t == typeof( byte ) )
155 ················return SQLiteDbType.Int2;
156 ············else if ( t == typeof( sbyte ) )
157 ················return SQLiteDbType.Int2;
158 ············else if ( t == typeof( char ) )
159 ················return SQLiteDbType.Int2;
160 ············else if ( t == typeof( short ) )
161 ················return SQLiteDbType.Int2;
162 ············else if ( t == typeof( ushort ) )
163 ················return SQLiteDbType.Int2;
164 ············else if ( t == typeof( int ) )
165 ················return SQLiteDbType.Integer;
166 ············else if ( t == typeof( uint ) )
167 ················return SQLiteDbType.Integer;
168 ············else if ( t == typeof( long ) )
169 ················return SQLiteDbType.Numeric;
170 ············else if ( t == typeof( System.Guid ) )
171 ················return SQLiteDbType.Guid;
172 ············else if ( t == typeof( ulong ) )
173 ················return SQLiteDbType.Numeric;
174 ············else if ( t == typeof( float ) )
175 ················return SQLiteDbType.Real;
176 ············else if ( t == typeof( double ) )
177 ················return SQLiteDbType.Real;
178 ············else if ( t == typeof( string ) )
179 ················return SQLiteDbType.Text;
180 ············else if ( t == typeof( byte[] ) )
181 ················return SQLiteDbType.Blob;
182 ············else if ( t == typeof( decimal ) )
183 ················return SQLiteDbType.Decimal;
184 ············else if ( t == typeof( System.DateTime ) )
185 ················return SQLiteDbType.Datetime;
186 ············else if ( t.IsSubclassOf( typeof( System.Enum ) ) )
187 ················return SQLiteDbType.Integer;
188 ············else
189 ················throw new NDOException( 27, "NDO.SQLiteProvider.GetDbType: Type " + t.Name + " can't be converted into SQLiteDbType." );
190 ········}
191
192 ········// The following method converts string representations of SQLiteDbType-Members
193 ········// into SQLiteDbType.
194 ········// For your own adapter use members of the database type emumeration of your
195 ········// ADO.NET provider and convert it to the respective enumeration type········
196 ········public override object GetDbType(string typeName)
197 ········{
198 ············SQLiteDbType result;
199
200 ············if (!Enum.TryParse<SQLiteDbType>(typeName, true, out result))
201 ············throw new NDOException(27, "NDO.SQLiteProvider.Provider.GetDbType: Typname " + typeName + " cannot be converted into a DbType.");
202 ············return result;
203 ········}
204
205 ········private string GetDateExpression(System.DateTime dt)
206 ········{
207 ············//'9999-12-31 23:59:59'
208 ············return "'" + dt.ToString("yyyy-MM-dd HH:mm:ss") + "." + dt.Millisecond + "'";
209 ········}
210 ····
211
212 ········public override int GetDefaultLength(System.Type t)
213 ········{
214 ············t = base.ConvertNullableType(t);
215 ············if (t == typeof(bool))
216 ················return 2;
217 ············else if ( t == typeof(byte) )
218 ················return 2;
219 ············else if ( t == typeof(sbyte) )
220 ················return 2;
221 ············else if ( t == typeof(char) )
222 ················return 2;
223 ············else if ( t == typeof(short))
224 ················return 2;
225 ············else if ( t == typeof(ushort))
226 ················return 2;
227 ············else if ( t == typeof(int))
228 ················return 4;
229 ············else if ( t == typeof(uint))
230 ················return 4;
231 ············else if ( t == typeof(long))
232 ················return 8;
233 ············else if ( t == typeof(System.Guid))
234 ················return 36;
235 ············else if ( t == typeof(ulong))
236 ················return 8;
237 ············else if ( t == typeof(float))
238 ················return 4;
239 ············else if ( t == typeof(double))
240 ················return 8;
241 ············else if ( t == typeof(string))
242 ················return 255;
243 ············else if ( t == typeof(byte[]))
244 ················return 255;
245 ············else if ( t == typeof(decimal))
246 ················return 10;
247 ············else if ( t == typeof(System.DateTime))
248 ················return 0;
249 ············else if ( t.IsSubclassOf(typeof(System.Enum)))
250 ················return 4;
251 ············else
252 ················return 0;········
253 ········}
254
255
256 ········public override string Wildcard
257 ········{
258 ············get { return "%"; }
259 ········}
260
261 ········public override bool UseNamedParams
262 ········{
263 ············get { return true; }
264 ········}
265
266 /*
267 ········public override bool UseStoredProcedure
268 ········{
269 ············get { return false; }
270 ········}
271 */
272 ········#endregion
273 ········
274 ········//private Hashtable namedParameters = new Hashtable();
275 ········public override string GetNamedParameter(string plainParameterName)
276 ········{
277 ············return ":" + plainParameterName;
278 ········}
279 ····
280 ········public override string GetQuotedName(string plainName)
281 ········{
282 ············return "\"" + plainName + '"';
283 ········}
284 ····
285 ········public override string GetSqlLiteral(object o)
286 ········{
287 ············if (o is DateTime)
288 ················return this.GetDateExpression((DateTime)o);
289 ············return base.GetSqlLiteral (o);
290 ········}
291 ········
292
293 ········/// <summary>
294 ········/// Indicates whether the last automatically generated ID can be retrieved.
295 ········/// Returns true if a database provides automatically incremented IDs and its syntax has an expression
296 ········/// which retrieves the last generated ID; otherwise false.
297 ········/// </summary>
298 ········public override bool SupportsLastInsertedId
299 ········{
300 ············get { return true; }
301 ········}
302
303
304 ········/// <summary>
305 ········/// Gets an expression in the SQL dialect of the database, which retrieves the ID of the last
306 ········/// inserted row, if the ID is automatically generated by the database.
307 ········/// </summary>
308 ········public override string GetLastInsertedId(string tableName, string columnName)
309 ········{
310 ············return "(SELECT last_insert_rowid())";
311 ········}
312
313 ········/// <summary>
314 ········/// Determines whether a database supports bulk command strings.
315 ········/// </summary>
316 ········public override bool SupportsBulkCommands
317 ········{
318 ············get { return false; }
319 ········}
320 ········
321
322 ········/// <summary>
323 ········/// Generate one big command string out of several partial commands to save roundtrips
324 ········/// to the server.
325 ········/// </summary>
326 ········/// <param name="commands"></param>
327 ········/// <returns></returns>
328 ········public override string GenerateBulkCommand(string[] commands)
329 ········{
330 ············StringBuilder sb = new StringBuilder(commands.Length * 100);
331 ············foreach (string s in commands)
332 ············{
333 ················sb.Append(s);
334 ················sb.Append(';');
335 ············}
336 ············return sb.ToString();
337 ········}
338
339 ············
340 ········public override string[] GetTableNames(IDbConnection conn, string owner)
341 ········{
342 ············SQLiteDataAdapter a = new SQLiteDataAdapter("SELECT name FROM sqlite_master WHERE type='table' ORDER BY name;", (SQLiteConnection)conn);
343 ············DataSet ds = new DataSet();
344 ············a.Fill(ds);
345 ············DataTable dt = ds.Tables[0];
346 ············string[] strresult = new string[dt.Rows.Count];
347
348 ············int i = 0;
349 ············foreach (DataRow dr in dt.Rows)
350 ············{
351 ················strresult[i++] = (string)dr["name"];
352 ············}
353
354 ············return strresult;
355 ········}
356 ····
357 ········public override string[] TypeNames
358 ········{
359 ············get
360 ············{················
361 ················return Enum.GetNames(typeof(SQLiteDbType));
362 ············}
363 ········}
364
365 ········public override string Name { get { return "Sqlite"; }··}
366
367 ········public override bool SupportsInsertBatch
368 ········{
369 ············get
370 ············{
371 ················return true;
372 ············}
373 ········}
374
375 ········public override bool SupportsNativeGuidType
376 ········{
377 ············get { return true; }
378 ········}
379
380 ········public override string FetchLimit( int skip, int take )
381 ········{
382 ············return "LIMIT " + skip + "," + take;
383 ········}
384
385
386 ········public override string CreateDatabase(string databaseName, string connectionString, object additionalData)
387 ········{
388 ············if (connectionString == null )
389 ················throw new ArgumentNullException( nameof(connectionString) );
390
391 ············string path = connectionString.Substring( connectionString.IndexOf( '=' ) + 1 );
392 ············path = path.Trim();
393
394 ············SQLiteConnection.CreateFile( path );
395
396 ············return connectionString;
397 ········}
398 ····}
399 }
400
New Commit (273289e)
1 //
2 // Copyright (c) 2002-2019 Mirko Matytschak
3 // (www.netdataobjects.de)
4 //
5 // Author: Mirko Matytschak
6 //
7 // Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
8 // documentation files (the "Software"), to deal in the Software without restriction, including without limitation
9 // the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
10 // Software, and to permit persons to whom the Software is furnished to do so, subject to the following
11 // conditions:
12
13 // The above copyright notice and this permission notice shall be included in all copies or substantial portions
14 // of the Software.
15 //
16 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
17 // TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
19 // CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
20 // DEALINGS IN THE SOFTWARE.
21
22
23 using System;
24 using System.Text;
25 using System.Reflection;
26 using System.Data;
27 using System.Data.Common;
28 using NDOInterfaces;
29
30 using System.Data.SQLite;
31 using System.IO;
32
33 namespace System.Data.SQLite
34 {
35 ····public enum SQLiteDbType
36 ····{
37 ········Text,
38 ········Numeric,
39 ········Integer,
40 ········Decimal,
41 ········Int2,
42 ········Real,
43 ········Datetime,
44 ········Blob,
45 ········Guid
46 ····}
47 }
48
49 namespace NDO.SqliteProvider
50 {
51 ····/// <summary>
52 ····/// Sample adapter class to connect new ADO.NET Providers with NDO.
53 ····/// This Adapter is based on the SQLite SQLite Data Connector
54 ····/// </summary>
55 ····public class Provider : NDOAbstractProvider
56 ····{
57 ········public Provider()
58 ········{
59 ········}
60
61 ········// The following methods provide objects of provider classes
62 ········// which implement common interfaces in .NET:
63 ········// IDbConnection, IDbCommand, DbDataAdapter and the Parameter objects
64 ········#region Provide specialized type objects
65 ········public override System.Data.IDbConnection NewConnection(string connectionString)
66 ········{
67 ············return new SQLiteConnection(connectionString);
68 ········}
69
70 ········public override System.Data.IDbCommand NewSqlCommand(System.Data.IDbConnection connection)
71 ········{
72 ············SQLiteCommand command = new SQLiteCommand();
73 ············command.Connection = (SQLiteConnection)connection;
74 ············return command;
75 ········}
76
77 ········public override DbDataAdapter NewDataAdapter(System.Data.IDbCommand select, System.Data.IDbCommand update, System.Data.IDbCommand insert, System.Data.IDbCommand delete)
78 ········{
79 ············SQLiteDataAdapter da = new SQLiteDataAdapter();
80 ············da.SelectCommand = (SQLiteCommand)select;
81 ············da.UpdateCommand = (SQLiteCommand)update;
82 ············da.InsertCommand = (SQLiteCommand)insert;
83 ············da.DeleteCommand = (SQLiteCommand)delete;
84 ············return da;
85 ········}
86
87 ········/// <summary>
88 ········/// See <see cref="IProvider"> IProvider interface </see>
89 ········/// </summary>
90 ········public override object NewCommandBuilder(DbDataAdapter dataAdapter)
91 ········{
92 ············return new SQLiteCommandBuilder((SQLiteDataAdapter)dataAdapter);
93 ········}
94
95
96 ········public override IDataParameter AddParameter(IDbCommand command, string parameterName, object odbType, int size, string columnName)
97 ········{
98 ············DbType dbType = GetDbTypeFromSqliteDbType( (SQLiteDbType) odbType );
99 ············SQLiteParameter result = new SQLiteParameter( parameterName, dbType, size, columnName );
100 ············((SQLiteCommand)command).Parameters.Add(result);
101 ············return result;
102 ········}
103
104 ········public override IDataParameter AddParameter(IDbCommand command, string parameterName, object odbType, int size, ParameterDirection dir, bool isNullable, byte precision, byte scale, string srcColumn, DataRowVersion srcVersion, object value)
105 ········{
106 ············DbType dbType = GetDbTypeFromSqliteDbType( (SQLiteDbType) odbType );
107 ············SQLiteParameter result = new SQLiteParameter( parameterName, dbType, size, dir, isNullable, precision, scale, srcColumn, srcVersion, value );
108 ············((SQLiteCommand)command).Parameters.Add(result);
109 ············return result;
110 ········}
111
112 ········private DbType GetDbTypeFromSqliteDbType( SQLiteDbType sqliteDbType )
113 ········{
114 ············switch ( sqliteDbType )
115 ············{
116 ················case SQLiteDbType.Text:
117 ····················return DbType.String;
118 ················case SQLiteDbType.Numeric:
119 ····················return DbType.VarNumeric;
120 ················case SQLiteDbType.Integer:
121 ····················return DbType.Int32;
122 ················case SQLiteDbType.Int2:
123 ····················return DbType.Int16;
124 ················case SQLiteDbType.Decimal:
125 ····················return DbType.Decimal;
126 ················case SQLiteDbType.Real:
127 ····················return DbType.Double;
128 ················case SQLiteDbType.Datetime:
129 ····················return DbType.DateTime;
130 ················case SQLiteDbType.Blob:
131 ····················return DbType.Binary;
132 ················case SQLiteDbType.Guid:
133 ····················return DbType.String;
134 ············}
135 ············return DbType.String;
136 ········}
137
138 ········#endregion
139
140 ········// The following method convert System.Type objects to SQLiteDbType-Members
141 ········// For your own adapter use members of the database type emumeration
142 ········// of your ADO.NET provider
143 ········#region Provide SQLiteDbType members
144 ········public override object GetDbType(Type t)
145 ········{
146 ············t = base.ConvertNullableType(t);
147 ············return GetInternalDbType( t );
148 ········}
149
150 ········internal static SQLiteDbType GetInternalDbType( Type t )
151 ········{
152 ············if ( t == typeof( bool ) )
153 ················return SQLiteDbType.Int2;
154 ············else if ( t == typeof( byte ) )
155 ················return SQLiteDbType.Int2;
156 ············else if ( t == typeof( sbyte ) )
157 ················return SQLiteDbType.Int2;
158 ············else if ( t == typeof( char ) )
159 ················return SQLiteDbType.Int2;
160 ············else if ( t == typeof( short ) )
161 ················return SQLiteDbType.Int2;
162 ············else if ( t == typeof( ushort ) )
163 ················return SQLiteDbType.Int2;
164 ············else if ( t == typeof( int ) )
165 ················return SQLiteDbType.Integer;
166 ············else if ( t == typeof( uint ) )
167 ················return SQLiteDbType.Integer;
168 ············else if ( t == typeof( long ) )
169 ················return SQLiteDbType.Numeric;
170 ············else if ( t == typeof( System.Guid ) )
171 ················return SQLiteDbType.Guid;
172 ············else if ( t == typeof( ulong ) )
173 ················return SQLiteDbType.Numeric;
174 ············else if ( t == typeof( float ) )
175 ················return SQLiteDbType.Real;
176 ············else if ( t == typeof( double ) )
177 ················return SQLiteDbType.Real;
178 ············else if ( t == typeof( string ) )
179 ················return SQLiteDbType.Text;
180 ············else if ( t == typeof( byte[] ) )
181 ················return SQLiteDbType.Blob;
182 ············else if ( t == typeof( decimal ) )
183 ················return SQLiteDbType.Decimal;
184 ············else if ( t == typeof( System.DateTime ) )
185 ················return SQLiteDbType.Datetime;
186 ············else if ( t.IsSubclassOf( typeof( System.Enum ) ) )
187 ················return SQLiteDbType.Integer;
188 ············else
189 ················throw new NDOException( 27, "NDO.SQLiteProvider.GetDbType: Type " + t.Name + " can't be converted into SQLiteDbType." );
190 ········}
191
192 ········// The following method converts string representations of SQLiteDbType-Members
193 ········// into SQLiteDbType.
194 ········// For your own adapter use members of the database type emumeration of your
195 ········// ADO.NET provider and convert it to the respective enumeration type········
196 ········public override object GetDbType(string typeName)
197 ········{
198 ············SQLiteDbType result;
199
200 ············if (!Enum.TryParse<SQLiteDbType>(typeName, true, out result))
201 ············throw new NDOException(27, "NDO.SQLiteProvider.Provider.GetDbType: Typname " + typeName + " cannot be converted into a DbType.");
202 ············return result;
203 ········}
204
 
 
 
 
 
 
 
205 ········public override int GetDefaultLength(System.Type t)
206 ········{
207 ············t = base.ConvertNullableType(t);
208 ············if (t == typeof(bool))
209 ················return 2;
210 ············else if ( t == typeof(byte) )
211 ················return 2;
212 ············else if ( t == typeof(sbyte) )
213 ················return 2;
214 ············else if ( t == typeof(char) )
215 ················return 2;
216 ············else if ( t == typeof(short))
217 ················return 2;
218 ············else if ( t == typeof(ushort))
219 ················return 2;
220 ············else if ( t == typeof(int))
221 ················return 4;
222 ············else if ( t == typeof(uint))
223 ················return 4;
224 ············else if ( t == typeof(long))
225 ················return 8;
226 ············else if ( t == typeof(System.Guid))
227 ················return 36;
228 ············else if ( t == typeof(ulong))
229 ················return 8;
230 ············else if ( t == typeof(float))
231 ················return 4;
232 ············else if ( t == typeof(double))
233 ················return 8;
234 ············else if ( t == typeof(string))
235 ················return 255;
236 ············else if ( t == typeof(byte[]))
237 ················return 255;
238 ············else if ( t == typeof(decimal))
239 ················return 10;
240 ············else if ( t == typeof(System.DateTime))
241 ················return 0;
242 ············else if ( t.IsSubclassOf(typeof(System.Enum)))
243 ················return 4;
244 ············else
245 ················return 0;········
246 ········}
247
248
249 ········public override string Wildcard
250 ········{
251 ············get { return "%"; }
252 ········}
253
254 ········public override bool UseNamedParams
255 ········{
256 ············get { return true; }
257 ········}
258
259 /*
260 ········public override bool UseStoredProcedure
261 ········{
262 ············get { return false; }
263 ········}
264 */
265 ········#endregion
266 ········
267 ········//private Hashtable namedParameters = new Hashtable();
268 ········public override string GetNamedParameter(string plainParameterName)
269 ········{
270 ············return ":" + plainParameterName;
271 ········}
272 ····
273 ········public override string GetQuotedName(string plainName)
274 ········{
275 ············return "\"" + plainName + '"';
 
 
 
 
 
 
 
276 ········}
277 ····
278
279 ········/// <summary>
280 ········/// Indicates whether the last automatically generated ID can be retrieved.
281 ········/// Returns true if a database provides automatically incremented IDs and its syntax has an expression
282 ········/// which retrieves the last generated ID; otherwise false.
283 ········/// </summary>
284 ········public override bool SupportsLastInsertedId
285 ········{
286 ············get { return true; }
287 ········}
288
289
290 ········/// <summary>
291 ········/// Gets an expression in the SQL dialect of the database, which retrieves the ID of the last
292 ········/// inserted row, if the ID is automatically generated by the database.
293 ········/// </summary>
294 ········public override string GetLastInsertedId(string tableName, string columnName)
295 ········{
296 ············return "(SELECT last_insert_rowid())";
297 ········}
298
299 ········/// <summary>
300 ········/// Determines whether a database supports bulk command strings.
301 ········/// </summary>
302 ········public override bool SupportsBulkCommands
303 ········{
304 ············get { return false; }
305 ········}
306 ········
307
308 ········/// <summary>
309 ········/// Generate one big command string out of several partial commands to save roundtrips
310 ········/// to the server.
311 ········/// </summary>
312 ········/// <param name="commands"></param>
313 ········/// <returns></returns>
314 ········public override string GenerateBulkCommand(string[] commands)
315 ········{
316 ············StringBuilder sb = new StringBuilder(commands.Length * 100);
317 ············foreach (string s in commands)
318 ············{
319 ················sb.Append(s);
320 ················sb.Append(';');
321 ············}
322 ············return sb.ToString();
323 ········}
324
325 ············
326 ········public override string[] GetTableNames(IDbConnection conn, string owner)
327 ········{
328 ············SQLiteDataAdapter a = new SQLiteDataAdapter("SELECT name FROM sqlite_master WHERE type='table' ORDER BY name;", (SQLiteConnection)conn);
329 ············DataSet ds = new DataSet();
330 ············a.Fill(ds);
331 ············DataTable dt = ds.Tables[0];
332 ············string[] strresult = new string[dt.Rows.Count];
333
334 ············int i = 0;
335 ············foreach (DataRow dr in dt.Rows)
336 ············{
337 ················strresult[i++] = (string)dr["name"];
338 ············}
339
340 ············return strresult;
341 ········}
342 ····
343 ········public override string[] TypeNames
344 ········{
345 ············get
346 ············{················
347 ················return Enum.GetNames(typeof(SQLiteDbType));
348 ············}
349 ········}
350
351 ········public override string Name { get { return "Sqlite"; }··}
352
353 ········public override bool SupportsInsertBatch
354 ········{
355 ············get
356 ············{
357 ················return true;
358 ············}
359 ········}
360
361 ········public override bool SupportsNativeGuidType
362 ········{
363 ············get { return true; }
364 ········}
365
366 ········public override string FetchLimit( int skip, int take )
367 ········{
368 ············return "LIMIT " + skip + "," + take;
369 ········}
370
371
372 ········public override string CreateDatabase(string databaseName, string connectionString, object additionalData)
373 ········{
374 ············if (connectionString == null )
375 ················throw new ArgumentNullException( nameof(connectionString) );
376
377 ············string path = connectionString.Substring( connectionString.IndexOf( '=' ) + 1 );
378 ············path = path.Trim();
379
380 ············SQLiteConnection.CreateFile( path );
381
382 ············return connectionString;
383 ········}
384 ····}
385 }
386