private void ReadTable(IDataReader dataReader, DataTable schemaTable, int tableIndex) { ArgumentNullException.ThrowIfNull(dataReader); ArgumentNullException.ThrowIfNull(schemaTable); Assert.IsInRange(tableIndex >= 0); using (LogFactory.Instance.GetCurrentMethodLog()) { Exception exception = null; var dataReaderHelper = _provider.CreateDataReaderHelper(dataReader); var schemaRows = schemaTable.Rows; var count = schemaRows.Count; _resultWriter.WriteTableBegin(schemaTable); var fieldCount = dataReader.FieldCount; if (fieldCount < 0) { fieldCount = 0; } var rows = new object[_rowBlockSize][]; int i; for (i = 0; i < _rowBlockSize; i++) { rows[i] = new object[fieldCount]; } _rowCount = 0; i = 0; var first = true; var exitFromWhile = false; var stopwatch = Stopwatch.StartNew(); while (!_isCommandCancelled && !_thread.IsStopRequested && !exitFromWhile) { bool read; if (first) { first = false; _resultWriter.FirstRowReadBegin(); read = dataReader.Read(); var dataTypeNames = new string[count]; if (read) { for (var j = 0; j < count; ++j) { dataTypeNames[j] = dataReader.GetDataTypeName(j); } } _resultWriter.FirstRowReadEnd(dataTypeNames); } else { try { read = dataReader.Read(); } catch (Exception e) { read = false; exception = e; } } if (read) { ++_rowCount; dataReaderHelper.GetValues(rows[i]); ++i; if (i == _rowBlockSize || stopwatch.ElapsedMilliseconds >= 5000) { _resultWriter.WriteRows(rows, i); i = 0; stopwatch.Restart(); } if (_rowCount == _maxRecords) { CancelWaitCallback(null); break; } } else { exitFromWhile = true; } } if (i != _rowBlockSize) { Log.Trace("resultWriter.WriteRows(rows,i);"); _resultWriter.WriteRows(rows, i); } Log.Write(LogLevel.Trace, "resultWriter.WriteTableEnd(rowCount);"); _resultWriter.WriteTableEnd(); if (_rowCount > 0) { ++_tableCount; } if (exception != null) { throw exception; } } }
void IResultWriter.FirstRowReadBegin() => _logResultWriter.FirstRowReadBegin();