Trait ColumnIoExpr 

pub trait ColumnIoExpr: Send + Sync {
    // Required method
    fn evaluate_io(&self, df: &DataFrame) -> PolarsResult<Column>;
}

An expression a reader evaluates to a column, rather than to a predicate mask.

Required Methods

fn evaluate_io(&self, df: &DataFrame) -> PolarsResult<Column>

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors