private void ReadTable(IDataReader dataReader, DataTable schemaTable, int tableIndex)
{
Assert.IsNotNull(dataReader);
Assert.IsNotNull(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;
}
}
}
