Method scan

datafusion/catalog/src/empty.rs:66–78

(
        &self,
        _state: &dyn Session,
        projection: Option<&Vec<usize>>,
        _filters: &[Expr],
        _limit: Option<usize>,
    )

    }

    async fn scan(
        &self,
        _state: &dyn Session,
        projection: Option<&Vec<usize>>,
        _filters: &[Expr],
        _limit: Option<usize>,
    ) -> Result<Arc<dyn ExecutionPlan>> {
        // even though there is no data, projections apply
        let projected_schema = project_schema(&self.schema, projection)?;
        Ok(Arc::new(
            EmptyExec::new(projected_schema).with_partitions(self.partitions),
        ))
    }
}