Function mz_adapter::coord::peek::create_fast_path_plan

pub fn create_fast_path_plan<T: Timestamp>(
    dataflow_plan: &mut DataflowDescription<OptimizedMirRelationExpr, (), T>,
    view_id: GlobalId,
    finishing: Option<&RowSetFinishing>,
    persist_fast_path_limit: usize
) -> Result<Option<FastPathPlan>, OptimizerError>

Determine if the dataflow plan can be implemented without an actual dataflow.

If the optimized plan is a Constant or a Get of a maintained arrangement, we can avoid building a dataflow (and either just return the results, or peek out of the arrangement, respectively).