Struct Column

pub struct Column { /* private fields */ }

Helper struct used to access the streams associated to an ORC column. Its main use Column::get_stream, to get a stream.

Implementations

impl Column

pub fn get_stream( &self, kind: Kind, scratch: Vec<u8>, ) -> Result<Decompressor<'_>, Error>

Returns the stream kind associated to this column as a Decompressor. scratch becomes owned by Decompressor, which you can recover via into_inner.

pub fn encoding(&self) -> &ColumnEncoding

Returns the encoding of the column

pub fn dictionary_size(&self) -> Option<usize>

Returns the number of items in the dictionary, if any

pub fn number_of_rows(&self) -> usize

The number of rows on this column

pub fn into_inner(self) -> (StripeFooter, Vec<u8>)

Returns the underlying footer and the pre-allocated memory region containing all (compressed) streams of this column.

Trait Implementations

impl Debug for Column

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.