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
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
|
//------------------------------------------------------------------------------
// <copyright file="OleDbMetaDataFactory.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//
// <owner current="true" primary="true">Microsoft</owner>
// <owner current="true" primary="false">Mugunm</owner>
//
//------------------------------------------------------------------------------
namespace System.Data.OleDb{
using System;
using System.Data;
using System.IO;
using System.Collections;
using System.Data.ProviderBase;
using System.Data.Common;
using System.Diagnostics;
using System.Globalization;
using System.Text;
using System.Xml;
using System.Xml.Schema;
internal sealed class OleDbMetaDataFactory : DbMetaDataFactory{ // V1.2.3300
private struct SchemaRowsetName {
internal SchemaRowsetName(string schemaName, Guid schemaRowset) {
_schemaName = schemaName;
_schemaRowset = schemaRowset;
}
internal readonly string _schemaName;
internal readonly Guid _schemaRowset;
}
private const string _collectionName = "CollectionName";
private const string _populationMechanism = "PopulationMechanism";
private const string _prepareCollection = "PrepareCollection";
private readonly SchemaRowsetName[] _schemaMapping;
internal OleDbMetaDataFactory(Stream XMLStream,
string serverVersion,
string serverVersionNormalized,
SchemaSupport[] schemaSupport):
base(XMLStream, serverVersion, serverVersionNormalized) {
// set up the colletion mane schema rowset guid mapping
_schemaMapping = new SchemaRowsetName[] {
new SchemaRowsetName(DbMetaDataCollectionNames.DataTypes,OleDbSchemaGuid.Provider_Types),
new SchemaRowsetName(OleDbMetaDataCollectionNames.Catalogs,OleDbSchemaGuid.Catalogs),
new SchemaRowsetName(OleDbMetaDataCollectionNames.Collations,OleDbSchemaGuid.Collations),
new SchemaRowsetName(OleDbMetaDataCollectionNames.Columns,OleDbSchemaGuid.Columns),
new SchemaRowsetName(OleDbMetaDataCollectionNames.Indexes,OleDbSchemaGuid.Indexes),
new SchemaRowsetName(OleDbMetaDataCollectionNames.Procedures,OleDbSchemaGuid.Procedures),
new SchemaRowsetName(OleDbMetaDataCollectionNames.ProcedureColumns,OleDbSchemaGuid.Procedure_Columns),
new SchemaRowsetName(OleDbMetaDataCollectionNames.ProcedureParameters,OleDbSchemaGuid.Procedure_Parameters),
new SchemaRowsetName(OleDbMetaDataCollectionNames.Tables,OleDbSchemaGuid.Tables),
new SchemaRowsetName(OleDbMetaDataCollectionNames.Views,OleDbSchemaGuid.Views)};
// verify the existence of the table in the data set
DataTable metaDataCollectionsTable = CollectionDataSet.Tables[DbMetaDataCollectionNames.MetaDataCollections];
if (metaDataCollectionsTable == null){
throw ADP.UnableToBuildCollection(DbMetaDataCollectionNames.MetaDataCollections);
}
// copy the table filtering out any rows that don't apply to the current version of the provider
metaDataCollectionsTable = CloneAndFilterCollection(DbMetaDataCollectionNames.MetaDataCollections, null);
// verify the existence of the table in the data set
DataTable restrictionsTable = CollectionDataSet.Tables[DbMetaDataCollectionNames.Restrictions];
if (restrictionsTable != null){
// copy the table filtering out any rows that don't apply to the current version of the provider
restrictionsTable= CloneAndFilterCollection(DbMetaDataCollectionNames.Restrictions, null);
}
// need to filter out any of the collections where
// 1) it is populated using prepare collection
// 2) it is in the collection to schema rowset mapping above
// 3) the provider does not support the necessary schema rowset
DataColumn populationMechanism = metaDataCollectionsTable.Columns[_populationMechanism];
if ((null == populationMechanism) || (typeof(System.String) != populationMechanism.DataType)) {
throw ADP.InvalidXmlMissingColumn(DbMetaDataCollectionNames.MetaDataCollections,_populationMechanism);
}
DataColumn collectionName = metaDataCollectionsTable.Columns[_collectionName];
if ((null == collectionName) || (typeof(System.String) != collectionName.DataType)) {
throw ADP.InvalidXmlMissingColumn(DbMetaDataCollectionNames.MetaDataCollections,_collectionName);
}
DataColumn restrictionCollectionName = null;
if (restrictionsTable != null){
restrictionCollectionName = restrictionsTable.Columns[_collectionName];
if ((null == restrictionCollectionName) || (typeof(System.String) != restrictionCollectionName.DataType)) {
throw ADP.InvalidXmlMissingColumn(DbMetaDataCollectionNames.Restrictions,_collectionName);
}
}
foreach (DataRow collection in metaDataCollectionsTable.Rows){
string populationMechanismValue = collection[populationMechanism] as string;
if (ADP.IsEmpty(populationMechanismValue )) {
throw ADP.InvalidXmlInvalidValue(DbMetaDataCollectionNames.MetaDataCollections,_populationMechanism);
}
string collectionNameValue = collection[collectionName] as string;
if (ADP.IsEmpty(collectionNameValue)) {
throw ADP.InvalidXmlInvalidValue(DbMetaDataCollectionNames.MetaDataCollections,_collectionName);
}
if (populationMechanismValue == _prepareCollection) {
// is the collection in the mapping
int mapping = -1;
for (int i = 0; i < _schemaMapping.Length; i++){
if (_schemaMapping[i]._schemaName == collectionNameValue){
mapping = i;
break;
}
}
// no go on to the next collection
if (mapping == -1) {
continue;
}
// does the provider support the necessary schema rowset
bool isSchemaRowsetSupported = false;
if (schemaSupport != null){
for (int i = 0; i < schemaSupport.Length; i++){
if (_schemaMapping[mapping]._schemaRowset == schemaSupport[i]._schemaRowset){
isSchemaRowsetSupported = true;
break;
}
}
}
// if not delete the row from the table
if (isSchemaRowsetSupported == false){
// but first delete any related restrictions
if (restrictionsTable != null) {
foreach (DataRow restriction in restrictionsTable.Rows) {
string restrictionCollectionNameValue = restriction[restrictionCollectionName] as string;
if (ADP.IsEmpty(restrictionCollectionNameValue)) {
throw ADP.InvalidXmlInvalidValue(DbMetaDataCollectionNames.Restrictions,_collectionName);
}
if (collectionNameValue == restrictionCollectionNameValue) {
restriction.Delete();
}
}
restrictionsTable.AcceptChanges();
}
collection.Delete();
}
}
}
// replace the original table with the updated one
metaDataCollectionsTable.AcceptChanges();
CollectionDataSet.Tables.Remove(CollectionDataSet.Tables[DbMetaDataCollectionNames.MetaDataCollections]);
CollectionDataSet.Tables.Add(metaDataCollectionsTable);
if (restrictionsTable != null) {
CollectionDataSet.Tables.Remove(CollectionDataSet.Tables[DbMetaDataCollectionNames.Restrictions]);
CollectionDataSet.Tables.Add(restrictionsTable);
}
}
private String BuildRegularExpression(string invalidChars, string invalidStartingChars){
StringBuilder regularExpression = new StringBuilder("[^");
ADP.EscapeSpecialCharacters(invalidStartingChars,regularExpression);
regularExpression.Append("][^");
ADP.EscapeSpecialCharacters(invalidChars,regularExpression);
regularExpression.Append("]*");
return regularExpression.ToString();
}
private DataTable GetDataSourceInformationTable(OleDbConnection connection, OleDbConnectionInternal internalConnection){
// verify that the data source information table is in the data set
DataTable dataSourceInformationTable = CollectionDataSet.Tables[DbMetaDataCollectionNames.DataSourceInformation];
if (dataSourceInformationTable == null){
throw ADP.UnableToBuildCollection(DbMetaDataCollectionNames.DataSourceInformation);
}
// copy the table filtering out any rows that don't apply to tho current version of the prrovider
dataSourceInformationTable = CloneAndFilterCollection(DbMetaDataCollectionNames.DataSourceInformation, null);
// after filtering there better be just one row
if (dataSourceInformationTable.Rows.Count != 1){
throw ADP.IncorrectNumberOfDataSourceInformationRows();
}
DataRow dataSourceInformation = dataSourceInformationTable.Rows[0];
// update the identifier separator
string catalogSeparatorPattern = internalConnection.GetLiteralInfo(ODB.DBLITERAL_CATALOG_SEPARATOR);
string schemaSeparatorPattern = internalConnection.GetLiteralInfo(ODB.DBLITERAL_SCHEMA_SEPARATOR);
if (catalogSeparatorPattern != null) {
StringBuilder compositeSeparatorPattern = new StringBuilder();
StringBuilder patternEscaped = new StringBuilder();
ADP.EscapeSpecialCharacters(catalogSeparatorPattern,patternEscaped);
compositeSeparatorPattern.Append(patternEscaped.ToString());
if ((schemaSeparatorPattern != null) && (schemaSeparatorPattern != catalogSeparatorPattern)) {
compositeSeparatorPattern.Append("|");
patternEscaped.Length = 0;
ADP.EscapeSpecialCharacters(schemaSeparatorPattern,patternEscaped);
compositeSeparatorPattern.Append(patternEscaped.ToString());
}
dataSourceInformation[DbMetaDataColumnNames.CompositeIdentifierSeparatorPattern] = compositeSeparatorPattern.ToString();
}
else if (schemaSeparatorPattern != null){
StringBuilder patternEscaped = new StringBuilder();
ADP.EscapeSpecialCharacters(schemaSeparatorPattern, patternEscaped);
dataSourceInformation[DbMetaDataColumnNames.CompositeIdentifierSeparatorPattern] = patternEscaped.ToString();;
}
// update the DataSourceProductName
object property;
property = connection.GetDataSourcePropertyValue(OleDbPropertySetGuid.DataSourceInfo,ODB.DBPROP_DBMSNAME);
if (property != null) {
dataSourceInformation[DbMetaDataColumnNames.DataSourceProductName] = (string) property;
}
// update the server version strings
dataSourceInformation[DbMetaDataColumnNames.DataSourceProductVersion] = ServerVersion;
dataSourceInformation[DbMetaDataColumnNames.DataSourceProductVersionNormalized] = ServerVersionNormalized;
// values that are the same for all OLE DB Providers. See SQLBU 308529
dataSourceInformation[DbMetaDataColumnNames.ParameterMarkerFormat] = "?";
dataSourceInformation[DbMetaDataColumnNames.ParameterMarkerPattern] = "\\?";
dataSourceInformation[DbMetaDataColumnNames.ParameterNameMaxLength] = 0;
property = connection.GetDataSourcePropertyValue(OleDbPropertySetGuid.DataSourceInfo,ODB.DBPROP_GROUPBY);
GroupByBehavior groupByBehavior = GroupByBehavior.Unknown;
if (property != null) {
switch ((int)property) {
case ODB.DBPROPVAL_GB_CONTAINS_SELECT:
groupByBehavior = GroupByBehavior.MustContainAll;
break;
case ODB.DBPROPVAL_GB_EQUALS_SELECT:
groupByBehavior = GroupByBehavior.ExactMatch;
break;
case ODB.DBPROPVAL_GB_NO_RELATION:
groupByBehavior = GroupByBehavior.Unrelated;
break;
case ODB.DBPROPVAL_GB_NOT_SUPPORTED:
groupByBehavior = GroupByBehavior.NotSupported;
break;
}
}
dataSourceInformation[DbMetaDataColumnNames.GroupByBehavior] = groupByBehavior;
SetIdentifierCase(DbMetaDataColumnNames.IdentifierCase,ODB.DBPROP_IDENTIFIERCASE,dataSourceInformation, connection);
SetIdentifierCase(DbMetaDataColumnNames.QuotedIdentifierCase,ODB.DBPROP_QUOTEDIDENTIFIERCASE,dataSourceInformation, connection);
property = connection.GetDataSourcePropertyValue(OleDbPropertySetGuid.DataSourceInfo,ODB.DBPROP_ORDERBYCOLUNSINSELECT);
if (property != null) {
dataSourceInformation[DbMetaDataColumnNames.OrderByColumnsInSelect] = (bool) property;
}
DataTable infoLiterals = internalConnection.BuildInfoLiterals();
if (infoLiterals != null){
DataRow[] tableNameRow = infoLiterals.Select("Literal = " + ODB.DBLITERAL_TABLE_NAME.ToString(CultureInfo.InvariantCulture));
if (tableNameRow != null) {
object invalidCharsObject = tableNameRow[0]["InvalidChars"];
if (invalidCharsObject.GetType() == typeof(string)) {
string invalidChars = (string)invalidCharsObject;
object invalidStartingCharsObject = tableNameRow[0]["InvalidStartingChars"];
string invalidStartingChars;
if (invalidStartingCharsObject.GetType() == typeof(string)) {
invalidStartingChars = (string)invalidStartingCharsObject;
}
else {
invalidStartingChars = invalidChars;
}
dataSourceInformation[DbMetaDataColumnNames.IdentifierPattern] =
BuildRegularExpression(invalidChars,invalidStartingChars);
}
}
}
// build the QuotedIdentifierPattern using the quote prefix and suffix from the provider and
// assuming that the quote suffix is escaped via repetion (i.e " becomes "")
string quotePrefix;
string quoteSuffix;
connection.GetLiteralQuotes(ADP.GetSchema, out quotePrefix, out quoteSuffix);
if (quotePrefix != null){
// if the quote suffix is null assume that it is the same as the prefix (See OLEDB spec
// IDBInfo::GetLiteralInfo DBLITERAL_QUOTE_SUFFIX.)
if (quoteSuffix == null) {
quoteSuffix = quotePrefix;
}
// only know how to build the parttern if the suffix is 1 character
// in all other cases just leave the field null
if (quoteSuffix.Length == 1) {
StringBuilder scratchStringBuilder = new StringBuilder();
ADP.EscapeSpecialCharacters(quoteSuffix,scratchStringBuilder );
string escapedQuoteSuffixString = scratchStringBuilder.ToString();
scratchStringBuilder.Length = 0;
ADP.EscapeSpecialCharacters(quotePrefix, scratchStringBuilder);
scratchStringBuilder.Append("(([^");
scratchStringBuilder.Append(escapedQuoteSuffixString);
scratchStringBuilder.Append("]|");
scratchStringBuilder.Append(escapedQuoteSuffixString);
scratchStringBuilder.Append(escapedQuoteSuffixString);
scratchStringBuilder.Append(")*)");
scratchStringBuilder.Append(escapedQuoteSuffixString);
dataSourceInformation[DbMetaDataColumnNames.QuotedIdentifierPattern] = scratchStringBuilder.ToString();
}
}
dataSourceInformationTable.AcceptChanges();
return dataSourceInformationTable;
}
private DataTable GetDataTypesTable(OleDbConnection connection){
// verify the existence of the table in the data set
DataTable dataTypesTable = CollectionDataSet.Tables[DbMetaDataCollectionNames.DataTypes];
if (dataTypesTable == null){
throw ADP.UnableToBuildCollection(DbMetaDataCollectionNames.DataTypes);
}
// copy the table filtering out any rows that don't apply to tho current version of the prrovider
dataTypesTable = CloneAndFilterCollection(DbMetaDataCollectionNames.DataTypes, null);
DataTable providerTypesTable = connection.GetOleDbSchemaTable(OleDbSchemaGuid.Provider_Types,null);
DataColumn[] targetColumns = new DataColumn[] {
dataTypesTable.Columns[DbMetaDataColumnNames.TypeName],
dataTypesTable.Columns[DbMetaDataColumnNames.ColumnSize],
dataTypesTable.Columns[DbMetaDataColumnNames.CreateParameters],
dataTypesTable.Columns[DbMetaDataColumnNames.IsAutoIncrementable],
dataTypesTable.Columns[DbMetaDataColumnNames.IsCaseSensitive],
dataTypesTable.Columns[DbMetaDataColumnNames.IsFixedLength],
dataTypesTable.Columns[DbMetaDataColumnNames.IsFixedPrecisionScale],
dataTypesTable.Columns[DbMetaDataColumnNames.IsLong],
dataTypesTable.Columns[DbMetaDataColumnNames.IsNullable],
dataTypesTable.Columns[DbMetaDataColumnNames.IsUnsigned],
dataTypesTable.Columns[DbMetaDataColumnNames.MaximumScale],
dataTypesTable.Columns[DbMetaDataColumnNames.MinimumScale],
dataTypesTable.Columns[DbMetaDataColumnNames.LiteralPrefix],
dataTypesTable.Columns[DbMetaDataColumnNames.LiteralSuffix],
dataTypesTable.Columns[OleDbMetaDataColumnNames.NativeDataType]};
DataColumn[] sourceColumns = new DataColumn[] {
providerTypesTable.Columns["TYPE_NAME"],
providerTypesTable.Columns["COLUMN_SIZE"],
providerTypesTable.Columns["CREATE_PARAMS"],
providerTypesTable.Columns["AUTO_UNIQUE_VALUE"],
providerTypesTable.Columns["CASE_SENSITIVE"],
providerTypesTable.Columns["IS_FIXEDLENGTH"],
providerTypesTable.Columns["FIXED_PREC_SCALE"],
providerTypesTable.Columns["IS_LONG"],
providerTypesTable.Columns["IS_NULLABLE"],
providerTypesTable.Columns["UNSIGNED_ATTRIBUTE"],
providerTypesTable.Columns["MAXIMUM_SCALE"],
providerTypesTable.Columns["MINIMUM_SCALE"],
providerTypesTable.Columns["LITERAL_PREFIX"],
providerTypesTable.Columns["LITERAL_SUFFIX"],
providerTypesTable.Columns["DATA_TYPE"]};
Debug.Assert(sourceColumns.Length == targetColumns.Length);
DataColumn isSearchable = dataTypesTable.Columns[DbMetaDataColumnNames.IsSearchable];
DataColumn isSearchableWithLike = dataTypesTable.Columns[DbMetaDataColumnNames.IsSearchableWithLike];
DataColumn providerDbType = dataTypesTable.Columns[DbMetaDataColumnNames.ProviderDbType];
DataColumn clrType = dataTypesTable.Columns[DbMetaDataColumnNames.DataType];
DataColumn isLong = dataTypesTable.Columns[DbMetaDataColumnNames.IsLong];
DataColumn isFixed = dataTypesTable.Columns[DbMetaDataColumnNames.IsFixedLength];
DataColumn sourceOleDbType = providerTypesTable.Columns["DATA_TYPE"];
DataColumn searchable = providerTypesTable.Columns["SEARCHABLE"];
foreach (DataRow sourceRow in providerTypesTable.Rows) {
DataRow newRow = dataTypesTable.NewRow();
for (int i = 0; i < sourceColumns.Length; i++) {
if ((sourceColumns[i] != null) && (targetColumns[i] != null)){
newRow[targetColumns[i]] = sourceRow[sourceColumns[i]];
}
}
short nativeDataType = (short) Convert.ChangeType(sourceRow[sourceOleDbType],typeof(short), CultureInfo.InvariantCulture);
NativeDBType nativeType = NativeDBType.FromDBType(nativeDataType,(bool)newRow[isLong], (bool)newRow[isFixed]);
newRow[clrType] = nativeType.dataType.FullName;
newRow[providerDbType] = nativeType.enumOleDbType;
// searchable has to be special cased becasue it is not an eaxct mapping
if ((isSearchable != null) && (isSearchableWithLike != null) && (searchable != null)) {
newRow[isSearchable] = DBNull.Value;
newRow[isSearchableWithLike] = DBNull.Value;
if ( DBNull.Value != sourceRow[searchable]){
Int64 searchableValue = (Int64)(sourceRow[searchable]);
switch (searchableValue){
case ODB.DB_UNSEARCHABLE:
newRow[isSearchable] = false;
newRow[isSearchableWithLike] = false;
break;
case ODB.DB_LIKE_ONLY:
newRow[isSearchable] = false;
newRow[isSearchableWithLike] = true;
break;
case ODB.DB_ALL_EXCEPT_LIKE:
newRow[isSearchable] = true;
newRow[isSearchableWithLike] = false;
break;
case ODB.DB_SEARCHABLE:
newRow[isSearchable] = true;
newRow[isSearchableWithLike] = true;
break;
}
}
}
dataTypesTable.Rows.Add(newRow);
}
dataTypesTable.AcceptChanges();
return dataTypesTable;
}
private DataTable GetReservedWordsTable(OleDbConnectionInternal internalConnection){
// verify the existence of the table in the data set
DataTable reservedWordsTable = CollectionDataSet.Tables[DbMetaDataCollectionNames.ReservedWords];
if (null == reservedWordsTable){
throw ADP.UnableToBuildCollection(DbMetaDataCollectionNames.ReservedWords);
}
// copy the table filtering out any rows that don't apply to tho current version of the prrovider
reservedWordsTable = CloneAndFilterCollection(DbMetaDataCollectionNames.ReservedWords, null);
DataColumn reservedWordColumn = reservedWordsTable.Columns[DbMetaDataColumnNames.ReservedWord];
if (null == reservedWordColumn){
throw ADP.UnableToBuildCollection(DbMetaDataCollectionNames.ReservedWords);
}
if (!internalConnection.AddInfoKeywordsToTable(reservedWordsTable, reservedWordColumn)){
throw ODB.IDBInfoNotSupported();
}
return reservedWordsTable;
}
protected override DataTable PrepareCollection(String collectionName, String[] restrictions, DbConnection connection){
OleDbConnection oleDbConnection = (OleDbConnection) connection;
OleDbConnectionInternal oleDbInternalConnection = (OleDbConnectionInternal) (oleDbConnection.InnerConnection);
DataTable resultTable = null;
if (collectionName == DbMetaDataCollectionNames.DataSourceInformation){
if (ADP.IsEmptyArray(restrictions) == false){
throw ADP.TooManyRestrictions(DbMetaDataCollectionNames.DataSourceInformation);
}
resultTable = GetDataSourceInformationTable(oleDbConnection, oleDbInternalConnection);
}
else if (collectionName == DbMetaDataCollectionNames.DataTypes){
if (ADP.IsEmptyArray(restrictions) == false){
throw ADP.TooManyRestrictions(DbMetaDataCollectionNames.DataTypes);
}
resultTable = GetDataTypesTable(oleDbConnection);
}
else if (collectionName == DbMetaDataCollectionNames.ReservedWords){
if (ADP.IsEmptyArray(restrictions) == false){
throw ADP.TooManyRestrictions(DbMetaDataCollectionNames.ReservedWords);
}
resultTable = GetReservedWordsTable(oleDbInternalConnection);
}
else {
for (int i=0; i < _schemaMapping.Length; i++){
if (_schemaMapping[i]._schemaName== collectionName) {
// need to special case the oledb schema rowset restrictions on columns that are not
// string tpyes
object[] mungedRestrictions = restrictions;;
if (restrictions != null){
//verify that there are not too many restrictions
DataTable metaDataCollectionsTable = CollectionDataSet.Tables[DbMetaDataCollectionNames.MetaDataCollections];
int numberOfSupportedRestictions = -1;
// prepare colletion is called with the exact collection name so
// we can do an exact string comparision here
foreach (DataRow row in metaDataCollectionsTable.Rows){
string candidateCollectionName = ((string)row[DbMetaDataColumnNames.CollectionName,DataRowVersion.Current]);
if (collectionName == candidateCollectionName) {
numberOfSupportedRestictions = (int)row[DbMetaDataColumnNames.NumberOfRestrictions];
if (numberOfSupportedRestictions < restrictions.Length){
throw ADP.TooManyRestrictions(collectionName);
}
break;
}
}
Debug.Assert(numberOfSupportedRestictions != -1, "PrepareCollection was called for an collection that is not supported.");
// the 4th restrictionon the indexes schema rowset(type) is an I2 - enum
const int indexRestrictionTypeSlot = 3;
if ((collectionName == OleDbMetaDataCollectionNames.Indexes) &&
(restrictions.Length >= indexRestrictionTypeSlot+1) &&
(restrictions[indexRestrictionTypeSlot] != null)){
mungedRestrictions = new object[restrictions.Length];
for (int j = 0; j <restrictions.Length; j++){
mungedRestrictions[j] = restrictions[j];
}
UInt16 indexTypeValue;
if ((restrictions[indexRestrictionTypeSlot] == "DBPROPVAL_IT_BTREE") ||
(restrictions[indexRestrictionTypeSlot] == "1")){
indexTypeValue = 1;
}
else if ((restrictions[indexRestrictionTypeSlot] == "DBPROPVAL_IT_HASH") ||
(restrictions[indexRestrictionTypeSlot] == "2")){
indexTypeValue = 2;
}
else if ((restrictions[indexRestrictionTypeSlot] == "DBPROPVAL_IT_CONTENT") ||
(restrictions[indexRestrictionTypeSlot] == "3")){
indexTypeValue = 3;
}
else if ((restrictions[indexRestrictionTypeSlot] == "DBPROPVAL_IT_OTHER") ||
(restrictions[indexRestrictionTypeSlot] == "4")){
indexTypeValue = 4;
}
else {
throw ADP.InvalidRestrictionValue(collectionName,"TYPE",restrictions[indexRestrictionTypeSlot]);
}
mungedRestrictions[indexRestrictionTypeSlot] = indexTypeValue;
}
// the 4th restrictionon the procedures schema rowset(type) is an I2 - enum
const int procedureRestrictionTypeSlot = 3;
if ((collectionName == OleDbMetaDataCollectionNames.Procedures) &&
(restrictions.Length >= procedureRestrictionTypeSlot+1) &&
(restrictions[procedureRestrictionTypeSlot] != null)){
mungedRestrictions = new object[restrictions.Length];
for (int j = 0; j <restrictions.Length; j++){
mungedRestrictions[j] = restrictions[j];
}
Int16 procedureTypeValue;
if ((restrictions[procedureRestrictionTypeSlot] == "DB_PT_UNKNOWN") ||
(restrictions[procedureRestrictionTypeSlot] == "1")){
procedureTypeValue = 1;
}
else if ((restrictions[procedureRestrictionTypeSlot] == "DB_PT_PROCEDURE")||
(restrictions[procedureRestrictionTypeSlot] == "2")){
procedureTypeValue = 2;
}
else if ((restrictions[procedureRestrictionTypeSlot] == "DB_PT_FUNCTION")||
(restrictions[procedureRestrictionTypeSlot] == "3")){
procedureTypeValue = 3;
}
else {
throw ADP.InvalidRestrictionValue(collectionName,"PROCEDURE_TYPE",restrictions[procedureRestrictionTypeSlot]);
}
mungedRestrictions[procedureRestrictionTypeSlot] = procedureTypeValue;
}
}
resultTable = oleDbConnection.GetOleDbSchemaTable((System.Guid)_schemaMapping[i]._schemaRowset,mungedRestrictions);
break;
}
}
}
if (resultTable == null){
throw ADP.UnableToBuildCollection(collectionName);
}
return resultTable;
}
private void SetIdentifierCase(string columnName, int propertyID, DataRow row, OleDbConnection connection) {
object property = connection.GetDataSourcePropertyValue(OleDbPropertySetGuid.DataSourceInfo,propertyID);
IdentifierCase identifierCase = IdentifierCase.Unknown;
if (property != null) {
int propertyValue = (int)property;
switch (propertyValue) {
case ODB.DBPROPVAL_IC_UPPER:
case ODB.DBPROPVAL_IC_LOWER:
case ODB.DBPROPVAL_IC_MIXED:
identifierCase = IdentifierCase.Insensitive;
break;
case ODB.DBPROPVAL_IC_SENSITIVE:
identifierCase = IdentifierCase.Sensitive;
break;
}
}
row[columnName] = identifierCase;
}
}
}
|
