remove_bottleneck_in_subplan

datafusion_physical_optimizer::enforce_sorting

Function remove_bottleneck_in_subplan 

Source 
fn remove_bottleneck_in_subplan(
    requirements: PlanWithCorrespondingCoalescePartitions,
) -> Result<PlanWithCorrespondingCoalescePartitions>
Expand description

Removes parallelization-reducing, avoidable CoalescePartitionsExecs from the plan in node. After the removal of such CoalescePartitionsExecs from the plan, some of the remaining RepartitionExecs might become unnecessary. Removes such RepartitionExecs from the plan as well.