pub fn read(
lf: &LazyFrame,
sample: &Sample,
known_total: Option<usize>,
polars_streaming: bool,
) -> Result<AnalysisRows>Expand description
Read the rows sample asks for from a frame already cut to its scope.
known_total saves a count. The first-rows method reports the rows it read as the
total when none is known, and says so through sample_size: None, rather than pay
for a count the method exists to avoid.