private SubPlan buildFragment(PlanNode root, FragmentProperties properties, PlanFragmentId fragmentId) { Set<Symbol> dependencies = SymbolsExtractor.extractOutputSymbols(root); List<PlanNodeId> schedulingOrder = scheduleOrder(root); boolean equals = properties.getPartitionedSources().equals(ImmutableSet.copyOf(schedulingOrder)); checkArgument(equals, "Expected scheduling order (%s) to contain an entry for all partitioned sources (%s)", schedulingOrder, properties.getPartitionedSources()); PlanFragment fragment = new PlanFragment( fragmentId, root, Maps.filterKeys(types.allTypes(), in(dependencies)), properties.getPartitioningHandle(), schedulingOrder, properties.getPartitioningScheme(), StageExecutionDescriptor.ungroupedExecution(), statsAndCosts.getForSubplan(root)); return new SubPlan(fragment, properties.getChildren()); }