Struct SampleRows 

pub struct SampleRows { /* private fields */ }

The chunks a draw has kept, shared between its worker and the view that shows them. The data is held once: the view’s frame is built on these chunks.

Implementations

impl SampleRows

pub fn push(&self, key: u64, df: DataFrame)

Keep df, whose first row sat at key in the rows sampled.

pub fn take_new(&self) -> Vec<DataFrame>

The chunks kept since the last take, in arrival order.

pub fn rows(&self) -> usize

Rows kept so far.

pub fn bytes(&self) -> usize

Bytes the rows kept take, as Polars estimates them.

pub fn stopped(&self) -> Option<String>

Why memory stopped the draw, if it did.

pub fn take_in_source_order(&self) -> Result<Option<DataFrame>>

Every chunk, in the order the source holds its rows, as one frame of one chunk per column, the chunks let go: what the view keeps once the draw ends.

pub fn in_source_order(&self) -> Result<Option<DataFrame>>

Every chunk, in the order the source holds its rows, as one frame on the same buffers. None before anything was kept.

Trait Implementations

impl Default for SampleRows

fn default() -> Self

Returns the “default value” for a type.