private static int GetRowCount(string filename, int[] mainColIndices, List <Tuple <Relation[], int[], bool> > filters,
char separator)
{
StreamReader reader = FileUtils.GetReader(filename);
StreamReader auxReader = FileUtils.GetReader(filename);
int count = PerseusUtils.GetRowCount(reader, auxReader, mainColIndices, filters, separator);
reader.Close();
return(count);
}