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MappedWorkerSessionBuilderExt

datafusion_distributed

Trait MappedWorkerSessionBuilderExt 

Source 
pub trait MappedWorkerSessionBuilderExt {
    // Required method
    fn map<F>(self, f: F) -> MappedWorkerSessionBuilder<Self, F>
       where Self: Sized,
             F: Fn(SessionStateBuilder) -> Result<SessionState, DataFusionError>;
}

Required Methods§

Source

fn map<F>(self, f: F) -> MappedWorkerSessionBuilder<Self, F>
where Self: Sized, F: Fn(SessionStateBuilder) -> Result<SessionState, DataFusionError>,

Maps an existing WorkerSessionBuilder allowing to add further extensions to its already built SessionStateBuilder.

Useful if there’s already a WorkerSessionBuilder that needs to be extended with further capabilities.

Example:


let session_builder = DefaultSessionBuilder
    .map(|b: SessionStateBuilder| {
        // Add further things.
        Ok(b.build())
    });

Dyn Compatibility§

This trait is dyn compatible.

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

Implementors§