internal void GetLiteralQuotes(string method, out string quotePrefix, out string quoteSuffix)
{
CheckStateOpen(method);
OleDbConnectionPoolGroupProviderInfo info = ProviderInfo;
if (info.HasQuoteFix)
{
quotePrefix = info.QuotePrefix;
quoteSuffix = info.QuoteSuffix;
}
else
{
OleDbConnectionInternal connection = GetOpenConnection();
quotePrefix = connection.GetLiteralInfo(ODB.DBLITERAL_QUOTE_PREFIX);
quoteSuffix = connection.GetLiteralInfo(ODB.DBLITERAL_QUOTE_SUFFIX);
if (null == quotePrefix)
{
quotePrefix = "";
}
if (null == quoteSuffix)
{
quoteSuffix = quotePrefix;
}
info.SetQuoteFix(quotePrefix, quoteSuffix);
}
}
internal void GetLiteralQuotes(string method, out string quotePrefix, out string quoteSuffix)
{
this.CheckStateOpen(method);
OleDbConnectionPoolGroupProviderInfo providerInfo = this.ProviderInfo;
if (providerInfo.HasQuoteFix)
{
quotePrefix = providerInfo.QuotePrefix;
quoteSuffix = providerInfo.QuoteSuffix;
}
else
{
OleDbConnectionInternal openConnection = this.GetOpenConnection();
quotePrefix = openConnection.GetLiteralInfo(15);
quoteSuffix = openConnection.GetLiteralInfo(0x1c);
if (quotePrefix == null)
{
quotePrefix = "";
}
if (quoteSuffix == null)
{
quoteSuffix = quotePrefix;
}
providerInfo.SetQuoteFix(quotePrefix, quoteSuffix);
}
}
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.
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 GetDataSourceInformationTable(OleDbConnection connection, OleDbConnectionInternal internalConnection)
{
string str3;
string str4;
if (base.CollectionDataSet.Tables[DbMetaDataCollectionNames.DataSourceInformation] == null)
{
throw ADP.UnableToBuildCollection(DbMetaDataCollectionNames.DataSourceInformation);
}
DataTable table = base.CloneAndFilterCollection(DbMetaDataCollectionNames.DataSourceInformation, null);
if (table.Rows.Count != 1)
{
throw ADP.IncorrectNumberOfDataSourceInformationRows();
}
DataRow row = table.Rows[0];
string literalInfo = internalConnection.GetLiteralInfo(3);
string unescapedString = internalConnection.GetLiteralInfo(0x1b);
if (literalInfo != null)
{
StringBuilder builder3 = new StringBuilder();
StringBuilder escapedString = new StringBuilder();
ADP.EscapeSpecialCharacters(literalInfo, escapedString);
builder3.Append(escapedString.ToString());
if ((unescapedString != null) && (unescapedString != literalInfo))
{
builder3.Append("|");
escapedString.Length = 0;
ADP.EscapeSpecialCharacters(unescapedString, escapedString);
builder3.Append(escapedString.ToString());
}
row[DbMetaDataColumnNames.CompositeIdentifierSeparatorPattern] = builder3.ToString();
}
else if (unescapedString != null)
{
StringBuilder builder4 = new StringBuilder();
ADP.EscapeSpecialCharacters(unescapedString, builder4);
row[DbMetaDataColumnNames.CompositeIdentifierSeparatorPattern] = builder4.ToString();
}
object dataSourcePropertyValue = connection.GetDataSourcePropertyValue(OleDbPropertySetGuid.DataSourceInfo, 40);
if (dataSourcePropertyValue != null)
{
row[DbMetaDataColumnNames.DataSourceProductName] = (string) dataSourcePropertyValue;
}
row[DbMetaDataColumnNames.DataSourceProductVersion] = base.ServerVersion;
row[DbMetaDataColumnNames.DataSourceProductVersionNormalized] = base.ServerVersionNormalized;
row[DbMetaDataColumnNames.ParameterMarkerFormat] = "?";
row[DbMetaDataColumnNames.ParameterMarkerPattern] = @"\?";
row[DbMetaDataColumnNames.ParameterNameMaxLength] = 0;
dataSourcePropertyValue = connection.GetDataSourcePropertyValue(OleDbPropertySetGuid.DataSourceInfo, 0x2c);
GroupByBehavior unknown = GroupByBehavior.Unknown;
if (dataSourcePropertyValue != null)
{
switch (((int) dataSourcePropertyValue))
{
case 1:
unknown = GroupByBehavior.NotSupported;
break;
case 2:
unknown = GroupByBehavior.ExactMatch;
break;
case 4:
unknown = GroupByBehavior.MustContainAll;
break;
case 8:
unknown = GroupByBehavior.Unrelated;
break;
}
}
row[DbMetaDataColumnNames.GroupByBehavior] = unknown;
this.SetIdentifierCase(DbMetaDataColumnNames.IdentifierCase, 0x2e, row, connection);
this.SetIdentifierCase(DbMetaDataColumnNames.QuotedIdentifierCase, 100, row, connection);
dataSourcePropertyValue = connection.GetDataSourcePropertyValue(OleDbPropertySetGuid.DataSourceInfo, 0x55);
if (dataSourcePropertyValue != null)
{
row[DbMetaDataColumnNames.OrderByColumnsInSelect] = (bool) dataSourcePropertyValue;
}
DataTable table2 = internalConnection.BuildInfoLiterals();
if (table2 != null)
{
DataRow[] rowArray = table2.Select("Literal = " + 0x11.ToString(CultureInfo.InvariantCulture));
if (rowArray != null)
{
object obj4 = rowArray[0]["InvalidChars"];
if (obj4.GetType() == typeof(string))
{
string str6;
string invalidChars = (string) obj4;
object obj3 = rowArray[0]["InvalidStartingChars"];
if (obj3.GetType() == typeof(string))
{
str6 = (string) obj3;
}
else
{
str6 = invalidChars;
}
row[DbMetaDataColumnNames.IdentifierPattern] = this.BuildRegularExpression(invalidChars, str6);
}
}
}
connection.GetLiteralQuotes("GetSchema", out str4, out str3);
if (str4 != null)
{
if (str3 == null)
{
str3 = str4;
}
if (str3.Length == 1)
{
StringBuilder builder = new StringBuilder();
ADP.EscapeSpecialCharacters(str3, builder);
string str2 = builder.ToString();
builder.Length = 0;
ADP.EscapeSpecialCharacters(str4, builder);
builder.Append("(([^");
builder.Append(str2);
builder.Append("]|");
builder.Append(str2);
builder.Append(str2);
builder.Append(")*)");
builder.Append(str2);
row[DbMetaDataColumnNames.QuotedIdentifierPattern] = builder.ToString();
}
}
table.AcceptChanges();
return table;
}
private DataTable GetDataSourceInformationTable(OleDbConnection connection, OleDbConnectionInternal internalConnection)
{
string str3;
string str4;
if (base.CollectionDataSet.Tables[DbMetaDataCollectionNames.DataSourceInformation] == null)
{
throw ADP.UnableToBuildCollection(DbMetaDataCollectionNames.DataSourceInformation);
}
DataTable table = base.CloneAndFilterCollection(DbMetaDataCollectionNames.DataSourceInformation, null);
if (table.Rows.Count != 1)
{
throw ADP.IncorrectNumberOfDataSourceInformationRows();
}
DataRow row = table.Rows[0];
string literalInfo = internalConnection.GetLiteralInfo(3);
string unescapedString = internalConnection.GetLiteralInfo(0x1b);
if (literalInfo != null)
{
StringBuilder builder3 = new StringBuilder();
StringBuilder escapedString = new StringBuilder();
ADP.EscapeSpecialCharacters(literalInfo, escapedString);
builder3.Append(escapedString.ToString());
if ((unescapedString != null) && (unescapedString != literalInfo))
{
builder3.Append("|");
escapedString.Length = 0;
ADP.EscapeSpecialCharacters(unescapedString, escapedString);
builder3.Append(escapedString.ToString());
}
row[DbMetaDataColumnNames.CompositeIdentifierSeparatorPattern] = builder3.ToString();
}
else if (unescapedString != null)
{
StringBuilder builder4 = new StringBuilder();
ADP.EscapeSpecialCharacters(unescapedString, builder4);
row[DbMetaDataColumnNames.CompositeIdentifierSeparatorPattern] = builder4.ToString();
}
object dataSourcePropertyValue = connection.GetDataSourcePropertyValue(OleDbPropertySetGuid.DataSourceInfo, 40);
if (dataSourcePropertyValue != null)
{
row[DbMetaDataColumnNames.DataSourceProductName] = (string)dataSourcePropertyValue;
}
row[DbMetaDataColumnNames.DataSourceProductVersion] = base.ServerVersion;
row[DbMetaDataColumnNames.DataSourceProductVersionNormalized] = base.ServerVersionNormalized;
row[DbMetaDataColumnNames.ParameterMarkerFormat] = "?";
row[DbMetaDataColumnNames.ParameterMarkerPattern] = @"\?";
row[DbMetaDataColumnNames.ParameterNameMaxLength] = 0;
dataSourcePropertyValue = connection.GetDataSourcePropertyValue(OleDbPropertySetGuid.DataSourceInfo, 0x2c);
GroupByBehavior unknown = GroupByBehavior.Unknown;
if (dataSourcePropertyValue != null)
{
switch (((int)dataSourcePropertyValue))
{
case 1:
unknown = GroupByBehavior.NotSupported;
break;
case 2:
unknown = GroupByBehavior.ExactMatch;
break;
case 4:
unknown = GroupByBehavior.MustContainAll;
break;
case 8:
unknown = GroupByBehavior.Unrelated;
break;
}
}
row[DbMetaDataColumnNames.GroupByBehavior] = unknown;
this.SetIdentifierCase(DbMetaDataColumnNames.IdentifierCase, 0x2e, row, connection);
this.SetIdentifierCase(DbMetaDataColumnNames.QuotedIdentifierCase, 100, row, connection);
dataSourcePropertyValue = connection.GetDataSourcePropertyValue(OleDbPropertySetGuid.DataSourceInfo, 0x55);
if (dataSourcePropertyValue != null)
{
row[DbMetaDataColumnNames.OrderByColumnsInSelect] = (bool)dataSourcePropertyValue;
}
DataTable table2 = internalConnection.BuildInfoLiterals();
if (table2 != null)
{
DataRow[] rowArray = table2.Select("Literal = " + 0x11.ToString(CultureInfo.InvariantCulture));
if (rowArray != null)
{
object obj4 = rowArray[0]["InvalidChars"];
if (obj4.GetType() == typeof(string))
{
string str6;
string invalidChars = (string)obj4;
object obj3 = rowArray[0]["InvalidStartingChars"];
if (obj3.GetType() == typeof(string))
{
str6 = (string)obj3;
}
else
{
str6 = invalidChars;
}
row[DbMetaDataColumnNames.IdentifierPattern] = this.BuildRegularExpression(invalidChars, str6);
}
}
}
connection.GetLiteralQuotes("GetSchema", out str4, out str3);
if (str4 != null)
{
if (str3 == null)
{
str3 = str4;
}
if (str3.Length == 1)
{
StringBuilder builder = new StringBuilder();
ADP.EscapeSpecialCharacters(str3, builder);
string str2 = builder.ToString();
builder.Length = 0;
ADP.EscapeSpecialCharacters(str4, builder);
builder.Append("(([^");
builder.Append(str2);
builder.Append("]|");
builder.Append(str2);
builder.Append(str2);
builder.Append(")*)");
builder.Append(str2);
row[DbMetaDataColumnNames.QuotedIdentifierPattern] = builder.ToString();
}
}
table.AcceptChanges();
return(table);
}
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;
}