/// <summary>
/// Returns a DataTable that describes the column metadata of the DBase file.
/// </summary>
/// <returns>A DataTable that describes the column metadata.</returns>
internal DataTable GetSchemaTable()
{
DataTable schema = ProviderSchemaHelper.CreateSchemaTable();
foreach (KeyValuePair <String, DbaseField> entry in _dbaseColumns)
{
DataRow r = schema.NewRow();
DbaseField column = entry.Value;
r[ProviderSchemaHelper.ColumnNameColumn] = entry.Key;
r[ProviderSchemaHelper.ColumnSizeColumn] = column.Length;
r[ProviderSchemaHelper.ColumnOrdinalColumn] = column.Ordinal;
r[ProviderSchemaHelper.NumericPrecisionColumn] = column.Decimals;
r[ProviderSchemaHelper.NumericScaleColumn] = 0;
r[ProviderSchemaHelper.DataTypeColumn] = column.DataType;
r[ProviderSchemaHelper.AllowDBNullColumn] = true;
r[ProviderSchemaHelper.IsReadOnlyColumn] = true;
r[ProviderSchemaHelper.IsUniqueColumn] = false;
r[ProviderSchemaHelper.IsRowVersionColumn] = false;
r[ProviderSchemaHelper.IsKeyColumn] = false;
r[ProviderSchemaHelper.IsAutoIncrementColumn] = false;
r[ProviderSchemaHelper.IsLongColumn] = false;
// specializations, if ID is unique
//if (_ColumnNames[i] == "ID")
// r["IsUnique"] = true;
schema.Rows.Add(r);
}
return(schema);
}
internal static DataTable DeriveSchemaTable(FeatureDataTable model)
{
// UNDONE: the precision computation delegate should not be null
return(ProviderSchemaHelper.DeriveSchemaTable(model, getLengthByHeuristic, null, null));
}
