presto-main/src/main/java/io/prestosql/execution/scheduler/PhasedExecutionSchedule.java/PhasedExecutionSchedule/visitSpatialJoin
class PhasedExecutionSchedule:        @Override
        public Set<PlanFragmentId> visitSpatialJoin(SpatialJoinNode node, PlanFragmentId currentFragmentId)
        {
            return processJoin(node.getRight(), node.getLeft(), currentFragmentId);
        }