Module metadata 

Per-column metadata within a segment file.

Column metadata enables selective reading: the reader can determine which columns exist, their data types, and where their data is stored without reading any row group data.

Modules

data_types

Column data type tags.

roles

Column role tags.

Structs

ColumnBlockMeta

Per-row-group column block location and metadata.

ColumnMeta

Metadata for a single column within a segment.

SegmentMetadata

Metadata section stored after all row groups, before the footer.