Struct parquet2::read::ColumnIterator

pub struct ColumnIterator<R: Read + Seek> { /* private fields */ }

A MutStreamingIterator that reads column chunks one by one, returning a PageReader per column.

Implementations

impl<R: Read + Seek> ColumnIterator<R>

pub fn new(
    reader: R,
    columns: Vec<ColumnChunkMetaData>,
    page_filter: Option<PageFilter>,
    scratch: Vec<u8>,
    max_page_size: usize
) -> Self

Returns a new ColumnIterator max_page_size is the maximum allowed page size

Trait Implementations

impl<R: Read + Seek> MutStreamingIterator for ColumnIterator<R>

type Item = (PageReader<R>, ColumnChunkMetaData)

type Error = Error

fn advance(self) -> Result<State<Self>, Error>

fn get(&mut self) -> Option<&mut Self::Item>