Trait Executor 

pub trait Executor: Send + Sync {
    // Required method
    fn execute(&mut self, cache: &mut ExecutionState) -> PolarsResult<DataFrame>;

    // Provided method
    fn is_cache_prefiller(&self) -> bool { ... }
}

Executors will evaluate physical expressions and collect them in a DataFrame.

Executors have other executors as input. By having a tree of executors we can execute the physical plan until the last executor is evaluated.

Required Methods

fn execute(&mut self, cache: &mut ExecutionState) -> PolarsResult<DataFrame>

Provided Methods

fn is_cache_prefiller(&self) -> bool

Trait Implementations

impl Default for Box<dyn Executor>

fn default() -> Self

Returns the “default value” for a type.

Dyn Compatibility

This trait is dyn compatible.

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

Implementors