private BinaryTableReader(IStreamProvider streamProvider, string tableRootPath)
{
TablePath = tableRootPath;
_metadata = TableMetadataSerializer.Read(streamProvider, tableRootPath);
// Construct columns (files aren't opened until columns are subscribed to)
_columns = new BinaryReaderColumn[_metadata.Schema.Count];
for (int i = 0; i < _columns.Length; ++i)
{
_columns[i] = new BinaryReaderColumn(this, _metadata.Schema[i], streamProvider);
}
Reset();
}
public static IXTable Build(IStreamProvider streamProvider, string tableRootPath)
{
TableMetadata metadata = TableMetadataSerializer.Read(streamProvider, tableRootPath);
if (metadata.Partitions.Count > 0)
{
// If this table has partitions, load the parts (*allowing* recursive partitioning)
// This allows partitioning by a column where one column value still will hit the size limit.
return(ConcatenatedTable.Build(metadata.Partitions.Select((partition) => BinaryTableReader.Build(streamProvider, Path.Combine(tableRootPath, partition)))));
}
else
{
return(new BinaryTableReader(streamProvider, tableRootPath));
}
}
