Exemplo n.º 1
0
        // known difference: when getting the parameters for a sproc, the
        //   return value gets marked as a return value but for a sql stmt
        //   the return value gets marked as an output parameter.
        private static OleDbParameter[] DeriveParametersFromStoredProcedure(OleDbConnection connection, OleDbCommand command)
        {
            OleDbParameter[] plist = Array.Empty <OleDbParameter>();

            if (connection.SupportSchemaRowset(OleDbSchemaGuid.Procedure_Parameters))
            {
                string quotePrefix, quoteSuffix;
                connection.GetLiteralQuotes(ADP.DeriveParameters, out quotePrefix, out quoteSuffix);

                object?[] parsed = MultipartIdentifier.ParseMultipartIdentifier(command.CommandText, quotePrefix, quoteSuffix, '.', 4, true, SR.OLEDB_OLEDBCommandText, false);
                if (null == parsed[3])
                {
                    throw ADP.NoStoredProcedureExists(command.CommandText);
                }

                object?[] restrictions = new object[4];
                object    value;

                // Parse returns an enforced 4 part array
                // 0) Server - ignored but removal would be a run-time breaking change from V1.0
                // 1) Catalog
                // 2) Schema
                // 3) ProcedureName

                // Restrictions array which is passed to OleDb API expects:
                // 0) Catalog
                // 1) Schema
                // 2) ProcedureName
                // 3) ParameterName (leave null)

                // Copy from Parse format to OleDb API format
                Array.Copy(parsed, 1, restrictions, 0, 3);

                //if (cmdConnection.IsServer_msdaora) {
                //    restrictions[1] = Convert.ToString(cmdConnection.UserId).ToUpper();
                //}
                DataTable?table = connection.GetSchemaRowset(OleDbSchemaGuid.Procedure_Parameters, restrictions);

                if (null != table)
                {
                    DataColumnCollection columns = table.Columns;

                    DataColumn?parameterName      = null;
                    DataColumn?parameterDirection = null;
                    DataColumn?dataType           = null;
                    DataColumn?maxLen             = null;
                    DataColumn?numericPrecision   = null;
                    DataColumn?numericScale       = null;
                    DataColumn?backendtype        = null;

                    int index = columns.IndexOf(ODB.PARAMETER_NAME);
                    if (-1 != index)
                    {
                        parameterName = columns[index];
                    }

                    index = columns.IndexOf(ODB.PARAMETER_TYPE);
                    if (-1 != index)
                    {
                        parameterDirection = columns[index];
                    }

                    index = columns.IndexOf(ODB.DATA_TYPE);
                    if (-1 != index)
                    {
                        dataType = columns[index];
                    }

                    index = columns.IndexOf(ODB.CHARACTER_MAXIMUM_LENGTH);
                    if (-1 != index)
                    {
                        maxLen = columns[index];
                    }

                    index = columns.IndexOf(ODB.NUMERIC_PRECISION);
                    if (-1 != index)
                    {
                        numericPrecision = columns[index];
                    }

                    index = columns.IndexOf(ODB.NUMERIC_SCALE);
                    if (-1 != index)
                    {
                        numericScale = columns[index];
                    }

                    index = columns.IndexOf(ODB.TYPE_NAME);
                    if (-1 != index)
                    {
                        backendtype = columns[index];
                    }

                    DataRow[] dataRows = table.Select(null, ODB.ORDINAL_POSITION_ASC, DataViewRowState.CurrentRows);
                    plist = new OleDbParameter[dataRows.Length];
                    for (index = 0; index < dataRows.Length; ++index)
                    {
                        DataRow dataRow = dataRows[index];

                        OleDbParameter parameter = new OleDbParameter();

                        if ((null != parameterName) && !dataRow.IsNull(parameterName, DataRowVersion.Default))
                        {
                            // $CONSIDER - not trimming the @ from the beginning but to left the designer do that
                            parameter.ParameterName = Convert.ToString(dataRow[parameterName, DataRowVersion.Default], CultureInfo.InvariantCulture) !.TrimStart(new char[] { '@', ' ', ':' });
                        }
                        if ((null != parameterDirection) && !dataRow.IsNull(parameterDirection, DataRowVersion.Default))
                        {
                            short direction = Convert.ToInt16(dataRow[parameterDirection, DataRowVersion.Default], CultureInfo.InvariantCulture);
                            parameter.Direction = ConvertToParameterDirection(direction);
                        }
                        if ((null != dataType) && !dataRow.IsNull(dataType, DataRowVersion.Default))
                        {
                            // need to ping FromDBType, otherwise WChar->WChar when the user really wants VarWChar
                            short wType = Convert.ToInt16(dataRow[dataType, DataRowVersion.Default], CultureInfo.InvariantCulture);
                            parameter.OleDbType = NativeDBType.FromDBType(wType, false, false).enumOleDbType;
                        }
                        if ((null != maxLen) && !dataRow.IsNull(maxLen, DataRowVersion.Default))
                        {
                            parameter.Size = Convert.ToInt32(dataRow[maxLen, DataRowVersion.Default], CultureInfo.InvariantCulture);
                        }
                        switch (parameter.OleDbType)
                        {
                        case OleDbType.Decimal:
                        case OleDbType.Numeric:
                        case OleDbType.VarNumeric:
                            if ((null != numericPrecision) && !dataRow.IsNull(numericPrecision, DataRowVersion.Default))
                            {
                                // @devnote: unguarded cast from Int16 to Byte
                                parameter.PrecisionInternal = (byte)Convert.ToInt16(dataRow[numericPrecision], CultureInfo.InvariantCulture);
                            }
                            if ((null != numericScale) && !dataRow.IsNull(numericScale, DataRowVersion.Default))
                            {
                                // @devnote: unguarded cast from Int16 to Byte
                                parameter.ScaleInternal = (byte)Convert.ToInt16(dataRow[numericScale], CultureInfo.InvariantCulture);
                            }
                            break;

                        case OleDbType.VarBinary:
                        case OleDbType.VarChar:
                        case OleDbType.VarWChar:
                            value = dataRow[backendtype !, DataRowVersion.Default];
Exemplo n.º 2
0
        private static OleDbParameter[] DeriveParametersFromStoredProcedure(OleDbConnection connection, OleDbCommand command)
        {
            OleDbParameter[] parameterArray = new OleDbParameter[0];
            if (connection.SupportSchemaRowset(OleDbSchemaGuid.Procedure_Parameters))
            {
                string str3;
                string str4;
                connection.GetLiteralQuotes("DeriveParameters", out str4, out str3);
                object[] sourceArray = MultipartIdentifier.ParseMultipartIdentifier(command.CommandText, str4, str3, '.', 4, true, "OLEDB_OLEDBCommandText", false);
                if (sourceArray[3] == null)
                {
                    throw ADP.NoStoredProcedureExists(command.CommandText);
                }
                object[] destinationArray = new object[4];
                Array.Copy(sourceArray, 1, destinationArray, 0, 3);
                DataTable schemaRowset = connection.GetSchemaRowset(OleDbSchemaGuid.Procedure_Parameters, destinationArray);
                if (schemaRowset != null)
                {
                    DataColumnCollection columns = schemaRowset.Columns;
                    DataColumn           column6 = null;
                    DataColumn           column5 = null;
                    DataColumn           column4 = null;
                    DataColumn           column3 = null;
                    DataColumn           column2 = null;
                    DataColumn           column  = null;
                    DataColumn           column7 = null;
                    int index = columns.IndexOf("PARAMETER_NAME");
                    if (-1 != index)
                    {
                        column6 = columns[index];
                    }
                    index = columns.IndexOf("PARAMETER_TYPE");
                    if (-1 != index)
                    {
                        column5 = columns[index];
                    }
                    index = columns.IndexOf("DATA_TYPE");
                    if (-1 != index)
                    {
                        column4 = columns[index];
                    }
                    index = columns.IndexOf("CHARACTER_MAXIMUM_LENGTH");
                    if (-1 != index)
                    {
                        column3 = columns[index];
                    }
                    index = columns.IndexOf("NUMERIC_PRECISION");
                    if (-1 != index)
                    {
                        column2 = columns[index];
                    }
                    index = columns.IndexOf("NUMERIC_SCALE");
                    if (-1 != index)
                    {
                        column = columns[index];
                    }
                    index = columns.IndexOf("TYPE_NAME");
                    if (-1 != index)
                    {
                        column7 = columns[index];
                    }
                    DataRow[] rowArray = schemaRowset.Select(null, "ORDINAL_POSITION ASC", DataViewRowState.CurrentRows);
                    parameterArray = new OleDbParameter[rowArray.Length];
                    for (index = 0; index < rowArray.Length; index++)
                    {
                        DataRow        row       = rowArray[index];
                        OleDbParameter parameter = new OleDbParameter();
                        if ((column6 != null) && !row.IsNull(column6, DataRowVersion.Default))
                        {
                            parameter.ParameterName = Convert.ToString(row[column6, DataRowVersion.Default], CultureInfo.InvariantCulture).TrimStart(new char[] { '@', ' ', ':' });
                        }
                        if ((column5 != null) && !row.IsNull(column5, DataRowVersion.Default))
                        {
                            short num3 = Convert.ToInt16(row[column5, DataRowVersion.Default], CultureInfo.InvariantCulture);
                            parameter.Direction = ConvertToParameterDirection(num3);
                        }
                        if ((column4 != null) && !row.IsNull(column4, DataRowVersion.Default))
                        {
                            short dbType = Convert.ToInt16(row[column4, DataRowVersion.Default], CultureInfo.InvariantCulture);
                            parameter.OleDbType = NativeDBType.FromDBType(dbType, false, false).enumOleDbType;
                        }
                        if ((column3 != null) && !row.IsNull(column3, DataRowVersion.Default))
                        {
                            parameter.Size = Convert.ToInt32(row[column3, DataRowVersion.Default], CultureInfo.InvariantCulture);
                        }
                        switch (parameter.OleDbType)
                        {
                        case OleDbType.VarChar:
                        case OleDbType.VarWChar:
                        case OleDbType.VarBinary:
                        {
                            string str;
                            object obj2 = row[column7, DataRowVersion.Default];
                            if ((obj2 is string) && ((str = ((string)obj2).ToLower(CultureInfo.InvariantCulture)) != null))
                            {
                                if (str == "binary")
                                {
                                    break;
                                }
                                if (str == "image")
                                {
                                    goto Label_03B9;
                                }
                                if (str == "char")
                                {
                                    goto Label_03C6;
                                }
                                if (str == "text")
                                {
                                    goto Label_03D3;
                                }
                                if (str == "nchar")
                                {
                                    goto Label_03E0;
                                }
                                if (str == "ntext")
                                {
                                    goto Label_03ED;
                                }
                            }
                            goto Label_03F8;
                        }

                        case OleDbType.VarNumeric:
                        case OleDbType.Decimal:
                        case OleDbType.Numeric:
                            if ((column2 != null) && !row.IsNull(column2, DataRowVersion.Default))
                            {
                                parameter.PrecisionInternal = (byte)Convert.ToInt16(row[column2], CultureInfo.InvariantCulture);
                            }
                            if ((column != null) && !row.IsNull(column, DataRowVersion.Default))
                            {
                                parameter.ScaleInternal = (byte)Convert.ToInt16(row[column], CultureInfo.InvariantCulture);
                            }
                            goto Label_03F8;

                        default:
                            goto Label_03F8;
                        }
                        parameter.OleDbType = OleDbType.Binary;
                        goto Label_03F8;
Label_03B9:
                        parameter.OleDbType = OleDbType.LongVarBinary;
                        goto Label_03F8;
Label_03C6:
                        parameter.OleDbType = OleDbType.Char;
                        goto Label_03F8;
Label_03D3:
                        parameter.OleDbType = OleDbType.LongVarChar;
                        goto Label_03F8;
Label_03E0:
                        parameter.OleDbType = OleDbType.WChar;
                        goto Label_03F8;
Label_03ED:
                        parameter.OleDbType = OleDbType.LongVarWChar;
Label_03F8:
                        parameterArray[index] = parameter;
                    }
                }
                if ((parameterArray.Length == 0) && connection.SupportSchemaRowset(OleDbSchemaGuid.Procedures))
                {
                    object[] objArray3 = new object[4];
                    objArray3[2]     = command.CommandText;
                    destinationArray = objArray3;
                    if (connection.GetSchemaRowset(OleDbSchemaGuid.Procedures, destinationArray).Rows.Count == 0)
                    {
                        throw ADP.NoStoredProcedureExists(command.CommandText);
                    }
                }
                return(parameterArray);
            }
            if (!connection.SupportSchemaRowset(OleDbSchemaGuid.Procedures))
            {
                throw ODB.NoProviderSupportForSProcResetParameters(connection.Provider);
            }
            object[] objArray2 = new object[4];
            objArray2[2] = command.CommandText;
            object[] restrictions = objArray2;
            if (connection.GetSchemaRowset(OleDbSchemaGuid.Procedures, restrictions).Rows.Count == 0)
            {
                throw ADP.NoStoredProcedureExists(command.CommandText);
            }
            throw ODB.NoProviderSupportForSProcResetParameters(connection.Provider);
        }
Exemplo n.º 3
0
        // known difference: when getting the parameters for a sproc, the
        //   return value gets marked as a return value but for a sql stmt
        //   the return value gets marked as an output parameter.
        static private OleDbParameter[] DeriveParametersFromStoredProcedure(OleDbConnection connection, OleDbCommand command)
        {
            OleDbParameter[] plist = new OleDbParameter[0];

            if (connection.SupportSchemaRowset(OleDbSchemaGuid.Procedure_Parameters))
            {
                string quotePrefix, quoteSuffix;
                connection.GetLiteralQuotes(ADP.DeriveParameters, out quotePrefix, out quoteSuffix);

                Object[] parsed = MultipartIdentifier.ParseMultipartIdentifier(command.CommandText, quotePrefix, quoteSuffix, '.', 4, true, SR.OLEDB_OLEDBCommandText, false);
                if (null == parsed[3])
                {
                    throw ADP.NoStoredProcedureExists(command.CommandText);
                }

                Object[] restrictions = new object[4];
                object   value;

                // Parse returns an enforced 4 part array
                // 0) Server - ignored but removal would be a run-time breaking change from V1.0
                // 1) Catalog
                // 2) Schema
                // 3) ProcedureName

                // Restrictions array which is passed to OleDb API expects:
                // 0) Catalog
                // 1) Schema
                // 2) ProcedureName
                // 3) ParameterName (leave null)

                // Copy from Parse format to OleDb API format
                Array.Copy(parsed, 1, restrictions, 0, 3);

                //if (cmdConnection.IsServer_msdaora) {
                //    restrictions[1] = Convert.ToString(cmdConnection.UserId).ToUpper();
                //}
                DataTable table = connection.GetSchemaRowset(OleDbSchemaGuid.Procedure_Parameters, restrictions);

                if (null != table)
                {
                    DataColumnCollection columns = table.Columns;

                    DataColumn parameterName      = null;
                    DataColumn parameterDirection = null;
                    DataColumn dataType           = null;
                    DataColumn maxLen             = null;
                    DataColumn numericPrecision   = null;
                    DataColumn numericScale       = null;
                    DataColumn backendtype        = null;

                    int index = columns.IndexOf(ODB.PARAMETER_NAME);
                    if (-1 != index)
                    {
                        parameterName = columns[index];
                    }

                    index = columns.IndexOf(ODB.PARAMETER_TYPE);
                    if (-1 != index)
                    {
                        parameterDirection = columns[index];
                    }

                    index = columns.IndexOf(ODB.DATA_TYPE);
                    if (-1 != index)
                    {
                        dataType = columns[index];
                    }

                    index = columns.IndexOf(ODB.CHARACTER_MAXIMUM_LENGTH);
                    if (-1 != index)
                    {
                        maxLen = columns[index];
                    }

                    index = columns.IndexOf(ODB.NUMERIC_PRECISION);
                    if (-1 != index)
                    {
                        numericPrecision = columns[index];
                    }

                    index = columns.IndexOf(ODB.NUMERIC_SCALE);
                    if (-1 != index)
                    {
                        numericScale = columns[index];
                    }

                    index = columns.IndexOf(ODB.TYPE_NAME);
                    if (-1 != index)
                    {
                        backendtype = columns[index];
                    }

                    DataRow[] dataRows = table.Select(null, ODB.ORDINAL_POSITION_ASC, DataViewRowState.CurrentRows);
                    plist = new OleDbParameter[dataRows.Length];
                    for (index = 0; index < dataRows.Length; ++index)
                    {
                        DataRow dataRow = dataRows[index];

                        OleDbParameter parameter = new OleDbParameter();

                        if ((null != parameterName) && !dataRow.IsNull(parameterName, DataRowVersion.Default))
                        {
                            // $CONSIDER - not trimming the @ from the beginning but to left the designer do that
                            parameter.ParameterName = Convert.ToString(dataRow[parameterName, DataRowVersion.Default], CultureInfo.InvariantCulture).TrimStart(new char[] { '@', ' ', ':' });
                        }
                        if ((null != parameterDirection) && !dataRow.IsNull(parameterDirection, DataRowVersion.Default))
                        {
                            short direction = Convert.ToInt16(dataRow[parameterDirection, DataRowVersion.Default], CultureInfo.InvariantCulture);
                            parameter.Direction = ConvertToParameterDirection(direction);
                        }
                        if ((null != dataType) && !dataRow.IsNull(dataType, DataRowVersion.Default))
                        {
                            // need to ping FromDBType, otherwise WChar->WChar when the user really wants VarWChar
                            short wType = Convert.ToInt16(dataRow[dataType, DataRowVersion.Default], CultureInfo.InvariantCulture);
                            parameter.OleDbType = NativeDBType.FromDBType(wType, false, false).enumOleDbType;
                        }
                        if ((null != maxLen) && !dataRow.IsNull(maxLen, DataRowVersion.Default))
                        {
                            parameter.Size = Convert.ToInt32(dataRow[maxLen, DataRowVersion.Default], CultureInfo.InvariantCulture);
                        }
                        switch (parameter.OleDbType)
                        {
                        case OleDbType.Decimal:
                        case OleDbType.Numeric:
                        case OleDbType.VarNumeric:
                            if ((null != numericPrecision) && !dataRow.IsNull(numericPrecision, DataRowVersion.Default))
                            {
                                // @devnote: unguarded cast from Int16 to Byte
                                parameter.PrecisionInternal = (Byte)Convert.ToInt16(dataRow[numericPrecision], CultureInfo.InvariantCulture);
                            }
                            if ((null != numericScale) && !dataRow.IsNull(numericScale, DataRowVersion.Default))
                            {
                                // @devnote: unguarded cast from Int16 to Byte
                                parameter.ScaleInternal = (Byte)Convert.ToInt16(dataRow[numericScale], CultureInfo.InvariantCulture);
                            }
                            break;

                        case OleDbType.VarBinary:
                        case OleDbType.VarChar:
                        case OleDbType.VarWChar:
                            value = dataRow[backendtype, DataRowVersion.Default];
                            if (value is string)
                            {
                                string backendtypename = ((string)value).ToLower(CultureInfo.InvariantCulture);
                                switch (backendtypename)
                                {
                                case "binary":
                                    parameter.OleDbType = OleDbType.Binary;
                                    break;

                                //case "varbinary":
                                //    parameter.OleDbType = OleDbType.VarBinary;
                                //    break;
                                case "image":
                                    parameter.OleDbType = OleDbType.LongVarBinary;
                                    break;

                                case "char":
                                    parameter.OleDbType = OleDbType.Char;
                                    break;

                                //case "varchar":
                                //case "varchar2":
                                //    parameter.OleDbType = OleDbType.VarChar;
                                //    break;
                                case "text":
                                    parameter.OleDbType = OleDbType.LongVarChar;
                                    break;

                                case "nchar":
                                    parameter.OleDbType = OleDbType.WChar;
                                    break;

                                //case "nvarchar":
                                //    parameter.OleDbType = OleDbType.VarWChar;
                                case "ntext":
                                    parameter.OleDbType = OleDbType.LongVarWChar;
                                    break;
                                }
                            }
                            break;
                        }
                        //if (AdapterSwitches.OleDbSql.TraceVerbose) {
                        //    ADP.Trace_Parameter("StoredProcedure", parameter);
                        //}
                        plist[index] = parameter;
                    }
                }
                if ((0 == plist.Length) && connection.SupportSchemaRowset(OleDbSchemaGuid.Procedures))
                {
                    restrictions = new Object[4] {
                        null, null, command.CommandText, null
                    };
                    table = connection.GetSchemaRowset(OleDbSchemaGuid.Procedures, restrictions);
                    if (0 == table.Rows.Count)
                    {
                        throw ADP.NoStoredProcedureExists(command.CommandText);
                    }
                }
            }
            else if (connection.SupportSchemaRowset(OleDbSchemaGuid.Procedures))
            {
                Object[] restrictions = new Object[4] {
                    null, null, command.CommandText, null
                };
                DataTable table = connection.GetSchemaRowset(OleDbSchemaGuid.Procedures, restrictions);
                if (0 == table.Rows.Count)
                {
                    throw ADP.NoStoredProcedureExists(command.CommandText);
                }
                // we don't ever expect a procedure with 0 parameters, they should have at least a return value
                throw ODB.NoProviderSupportForSProcResetParameters(connection.Provider);
            }
            else
            {
                throw ODB.NoProviderSupportForSProcResetParameters(connection.Provider);
            }
            return(plist);
        }
Exemplo n.º 4
0
        // known difference: when getting the parameters for a sproc, the
        //   return value gets marked as a return value but for a sql stmt
        //   the return value gets marked as an output parameter.
        static private OleDbParameter[] DeriveParametersFromStoredProcedure(OleDbConnection connection, OleDbCommand command) {
            OleDbParameter[] plist = new OleDbParameter[0];

            if (connection.SupportSchemaRowset(OleDbSchemaGuid.Procedure_Parameters)) {
                string quotePrefix, quoteSuffix;
                connection.GetLiteralQuotes(ADP.DeriveParameters, out quotePrefix, out quoteSuffix);

                Object[] parsed = MultipartIdentifier.ParseMultipartIdentifier(command.CommandText, quotePrefix, quoteSuffix, '.', 4, true, Res.OLEDB_OLEDBCommandText, false); // MDAC 70930
                if (null == parsed[3]) {
                    throw ADP.NoStoredProcedureExists(command.CommandText);             
                }
                
                Object[] restrictions = new object[4];
                object value;

                // Parse returns an enforced 4 part array
                // 0) Server - ignored but removal would be a run-time breaking change from V1.0
                // 1) Catalog
                // 2) Schema
                // 3) ProcedureName

                // Restrictions array which is passed to OleDb API expects:
                // 0) Catalog
                // 1) Schema
                // 2) ProcedureName
                // 3) ParameterName (leave null)

                // Copy from Parse format to OleDb API format
                Array.Copy(parsed, 1, restrictions, 0, 3);

                //if (cmdConnection.IsServer_msdaora) {
                //    restrictions[1] = Convert.ToString(cmdConnection.UserId).ToUpper();
                //}
                DataTable table = connection.GetSchemaRowset(OleDbSchemaGuid.Procedure_Parameters, restrictions);

                if (null != table) {
                    DataColumnCollection columns = table.Columns;

                    DataColumn parameterName = null;
                    DataColumn parameterDirection = null;
                    DataColumn dataType = null;
                    DataColumn maxLen = null;
                    DataColumn numericPrecision = null;
                    DataColumn numericScale = null;
                    DataColumn backendtype = null;

                    int index = columns.IndexOf(ODB.PARAMETER_NAME);
                    if (-1 != index) parameterName = columns[index];

                    index = columns.IndexOf(ODB.PARAMETER_TYPE);
                    if (-1 != index) parameterDirection = columns[index];

                    index = columns.IndexOf(ODB.DATA_TYPE);
                    if (-1 != index) dataType = columns[index];

                    index = columns.IndexOf(ODB.CHARACTER_MAXIMUM_LENGTH);
                    if (-1 != index) maxLen = columns[index];

                    index = columns.IndexOf(ODB.NUMERIC_PRECISION);
                    if (-1 != index) numericPrecision = columns[index];

                    index = columns.IndexOf(ODB.NUMERIC_SCALE);
                    if (-1 != index) numericScale = columns[index];

                    index = columns.IndexOf(ODB.TYPE_NAME); // MDAC 72315
                    if (-1 != index) backendtype = columns[index];

                    DataRow[] dataRows = table.Select(null, ODB.ORDINAL_POSITION_ASC, DataViewRowState.CurrentRows); // MDAC 70928
                    plist = new OleDbParameter[dataRows.Length];
                    for(index = 0; index < dataRows.Length; ++index) {
                        DataRow dataRow = dataRows[index];

                        OleDbParameter parameter = new OleDbParameter();

                        if ((null != parameterName) && !dataRow.IsNull(parameterName, DataRowVersion.Default)) {
                            // $
                            parameter.ParameterName = Convert.ToString(dataRow[parameterName, DataRowVersion.Default], CultureInfo.InvariantCulture).TrimStart(new char[] { '@', ' ', ':'});
                        }
                        if ((null != parameterDirection) && !dataRow.IsNull(parameterDirection, DataRowVersion.Default)) {
                            short direction = Convert.ToInt16(dataRow[parameterDirection, DataRowVersion.Default], CultureInfo.InvariantCulture);
                            parameter.Direction = ConvertToParameterDirection(direction);
                        }
                        if ((null != dataType) && !dataRow.IsNull(dataType, DataRowVersion.Default)) {
                            // need to ping FromDBType, otherwise WChar->WChar when the user really wants VarWChar
                            short wType = Convert.ToInt16(dataRow[dataType, DataRowVersion.Default], CultureInfo.InvariantCulture);
                            parameter.OleDbType = NativeDBType.FromDBType(wType, false, false).enumOleDbType;
                        }
                        if ((null != maxLen) && !dataRow.IsNull(maxLen, DataRowVersion.Default)) {
                            parameter.Size = Convert.ToInt32(dataRow[maxLen, DataRowVersion.Default], CultureInfo.InvariantCulture);
                        }
                        switch(parameter.OleDbType) {
                            case OleDbType.Decimal:
                            case OleDbType.Numeric:
                            case OleDbType.VarNumeric:
                                if ((null != numericPrecision) && !dataRow.IsNull(numericPrecision, DataRowVersion.Default)) {
                                    // @devnote: unguarded cast from Int16 to Byte
                                    parameter.PrecisionInternal = (Byte) Convert.ToInt16(dataRow[numericPrecision], CultureInfo.InvariantCulture);
                                }
                                if ((null != numericScale) && !dataRow.IsNull(numericScale, DataRowVersion.Default)) {
                                    // @devnote: unguarded cast from Int16 to Byte
                                    parameter.ScaleInternal = (Byte) Convert.ToInt16(dataRow[numericScale], CultureInfo.InvariantCulture);
                                }
                                break;
                            case OleDbType.VarBinary: // MDAC 72315
                            case OleDbType.VarChar:
                            case OleDbType.VarWChar:
                                value = dataRow[backendtype, DataRowVersion.Default];
                                if (value is string) {
                                    string backendtypename = ((string) value).ToLower(CultureInfo.InvariantCulture);
                                    switch(backendtypename) {
                                    case "binary":
                                        parameter.OleDbType = OleDbType.Binary;
                                        break;
                                    //case "varbinary":
                                    //    parameter.OleDbType = OleDbType.VarBinary;
                                    //    break;
                                    case "image":
                                        parameter.OleDbType = OleDbType.LongVarBinary;
                                        break;
                                    case "char":
                                        parameter.OleDbType = OleDbType.Char;
                                        break;
                                    //case "varchar":
                                    //case "varchar2":
                                    //    parameter.OleDbType = OleDbType.VarChar;
                                    //    break;
                                    case "text":
                                        parameter.OleDbType = OleDbType.LongVarChar;
                                        break;
                                    case "nchar":
                                        parameter.OleDbType = OleDbType.WChar;
                                        break;
                                    //case "nvarchar":
                                    //    parameter.OleDbType = OleDbType.VarWChar;
                                    case "ntext":
                                        parameter.OleDbType = OleDbType.LongVarWChar;
                                        break;
                                    }
                                }
                                break;
                        }
                        //if (AdapterSwitches.OleDbSql.TraceVerbose) {
                        //    ADP.Trace_Parameter("StoredProcedure", parameter);
                        //}
                        plist[index] = parameter;
                    }
                }
                if ((0 == plist.Length) && connection.SupportSchemaRowset(OleDbSchemaGuid.Procedures)) {
                    restrictions = new Object[4] { null, null, command.CommandText, null};
                    table = connection.GetSchemaRowset(OleDbSchemaGuid.Procedures, restrictions);
                    if (0 == table.Rows.Count) {
                        throw ADP.NoStoredProcedureExists(command.CommandText);
                    }
                }
            }
            else if (connection.SupportSchemaRowset(OleDbSchemaGuid.Procedures)) {
                Object[] restrictions = new Object[4] { null, null, command.CommandText, null};
                DataTable table = connection.GetSchemaRowset(OleDbSchemaGuid.Procedures, restrictions);
                if (0 == table.Rows.Count) {
                    throw ADP.NoStoredProcedureExists(command.CommandText);
                }
                // we don't ever expect a procedure with 0 parameters, they should have at least a return value
                throw ODB.NoProviderSupportForSProcResetParameters(connection.Provider); // MDAC 71968
            }
            else {
                throw ODB.NoProviderSupportForSProcResetParameters(connection.Provider); // MDAC 70918
            }
            return plist;
        }