Trait SupportsProjectionPushdown 

pub trait SupportsProjectionPushdown {
    // Required method
    fn push_projection(&self, columns: &[String]) -> ProjectionApplication;
}

Marker trait: source supports projection pushdown.

Required Methods

fn push_projection(&self, columns: &[String]) -> ProjectionApplication

Declare which projected columns to actually read.

Dyn Compatibility

This trait is dyn compatible.

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

Implementors