Trait polars_io::predicates::PhysicalIoExpr

pub trait PhysicalIoExpr: Send + Sync {
    fn evaluate(&self, df: &DataFrame) -> PolarsResult<Series>;

    fn as_stats_evaluator(&self) -> Option<&dyn StatsEvaluator> { ... }
}

Available on crate feature private only.

Required Methods

fn evaluate(&self, df: &DataFrame) -> PolarsResult<Series>

Take a DataFrame and produces a boolean Series that serves as a predicate mask

Provided Methods

fn as_stats_evaluator(&self) -> Option<&dyn StatsEvaluator>

Available on crate feature parquet only.

Can take &dyn Statistics and determine of a file should be read -> true or not -> false

Implementors