Function parquet2::read::get_field_columns
source · [−]pub fn get_field_columns<'a>(
metadata: &'a FileMetaData,
row_group: usize,
field: &'a ParquetType
) -> impl Iterator<Item = &'a ColumnChunkMetaData>
Expand description
Returns an Iterator
of ColumnChunkMetaData
corresponding to the columns
from field
at row_group
.
For primitive fields (e.g. i64
), the iterator has exactly one item.