Method add_ordering

datafusion/physical-plan/src/memory.rs:244–248

(&mut self, ordering: impl IntoIterator<Item = PhysicalSortExpr>)

    }

    pub fn add_ordering(&mut self, ordering: impl IntoIterator<Item = PhysicalSortExpr>) {
        Arc::make_mut(&mut self.cache)
            .eq_properties
            .add_orderings(std::iter::once(ordering));
    }

    /// Get the batch generators
    pub fn generators(&self) -> &Vec<Arc<RwLock<dyn LazyBatchGenerator>>> {