Package com.facebook.presto.sql.planner.plan

Examples of com.facebook.presto.sql.planner.plan.LimitNode

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        @Override
        public SubPlanBuilder visitLimit(LimitNode node, Void context)
        {
            SubPlanBuilder current = node.getSource().accept(this, context);

            current.setRoot(new LimitNode(node.getId(), current.getRoot(), node.getCount(), node.getSampleWeight()));

            if (current.isDistributed()) {
                current.setRoot(new SinkNode(idAllocator.getNextId(), current.getRoot(), current.getRoot().getOutputSymbols()));

                // create merge plan fragment
                PlanNode source = new ExchangeNode(idAllocator.getNextId(), current.getId(), current.getRoot().getOutputSymbols());
                LimitNode merge = new LimitNode(idAllocator.getNextId(), source, node.getCount(), node.getSampleWeight());
                current = createSingleNodePlan(merge)
                        .addChild(current.build());
            }

            return current;
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    private PlanBuilder limit(PlanBuilder subPlan, List<SortItem> orderBy, Optional<String> limit)
    {
        if (orderBy.isEmpty() && limit.isPresent()) {
            long limitValue = Long.valueOf(limit.get());
            return new PlanBuilder(subPlan.getTranslations(), new LimitNode(idAllocator.getNextId(), subPlan.getRoot(), limitValue));
        }

        return subPlan;
    }
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        public PlanNode rewriteNode(PlanNode node, Long limit, PlanRewriter<Long> planRewriter)
        {
            PlanNode rewrittenNode = planRewriter.defaultRewrite(node, Long.MAX_VALUE);
            if (limit != Long.MAX_VALUE) {
                // Drop in a LimitNode b/c we cannot push our limit down any further
                rewrittenNode = new LimitNode(idAllocator.getNextId(), rewrittenNode, limit);
            }
            return rewrittenNode;
        }
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        @Override
        public PlanNode rewriteUnion(UnionNode node, Long limit, PlanRewriter<Long> planRewriter)
        {
            PlanNode output = planRewriter.defaultRewrite(node, limit);
            if (limit != Long.MAX_VALUE) {
                output = new LimitNode(idAllocator.getNextId(), output, limit);
            }
            return output;
        }
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        @Override
        public PlanNode rewriteLimit(LimitNode node, Set<Symbol> expectedOutputs, PlanRewriter<Set<Symbol>> planRewriter)
        {
            PlanNode source = planRewriter.rewrite(node.getSource(), expectedOutputs);
            return new LimitNode(node.getId(), source, node.getCount());
        }
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        @Override
        public SubPlanBuilder visitLimit(LimitNode node, Void context)
        {
            SubPlanBuilder current = node.getSource().accept(this, context);

            current.setRoot(new LimitNode(node.getId(), current.getRoot(), node.getCount()));

            if (current.isDistributed()) {
                current.setRoot(new SinkNode(idAllocator.getNextId(), current.getRoot(), current.getRoot().getOutputSymbols()));

                // create merge plan fragment
                PlanNode source = new ExchangeNode(idAllocator.getNextId(), current.getId(), current.getRoot().getOutputSymbols());
                LimitNode merge = new LimitNode(idAllocator.getNextId(), source, node.getCount());
                current = createSingleNodePlan(merge)
                        .addChild(current.build());
            }

            return current;
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        @Override
        public SubPlanBuilder visitLimit(LimitNode node, Void context)
        {
            SubPlanBuilder current = node.getSource().accept(this, context);

            current.setRoot(new LimitNode(node.getId(), current.getRoot(), node.getCount()));

            if (current.isDistributed()) {
                current.setRoot(new SinkNode(idAllocator.getNextId(), current.getRoot(), current.getRoot().getOutputSymbols()));

                // create merge plan fragment
                PlanNode source = new ExchangeNode(idAllocator.getNextId(), current.getId(), current.getRoot().getOutputSymbols());
                LimitNode merge = new LimitNode(idAllocator.getNextId(), source, node.getCount());
                current = createSingleNodePlan(merge)
                        .addChild(current.build());
            }

            return current;
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    private PlanBuilder limit(PlanBuilder subPlan, List<SortItem> orderBy, Optional<String> limit)
    {
        if (orderBy.isEmpty() && limit.isPresent()) {
            long limitValue = Long.valueOf(limit.get());
            return new PlanBuilder(subPlan.getTranslations(), new LimitNode(idAllocator.getNextId(), subPlan.getRoot(), limitValue));
        }

        return subPlan;
    }
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        @Override
        public SubPlanBuilder visitLimit(LimitNode node, Void context)
        {
            SubPlanBuilder current = node.getSource().accept(this, context);

            current.setRoot(new LimitNode(node.getId(), current.getRoot(), node.getCount(), node.getSampleWeight()));

            if (current.isDistributed()) {
                current.setRoot(new SinkNode(idAllocator.getNextId(), current.getRoot(), current.getRoot().getOutputSymbols()));

                // create merge plan fragment
                PlanNode source = new ExchangeNode(idAllocator.getNextId(), current.getId(), current.getRoot().getOutputSymbols());
                LimitNode merge = new LimitNode(idAllocator.getNextId(), source, node.getCount(), node.getSampleWeight());
                current = createSingleNodePlan(merge)
                        .addChild(current.build());
            }

            return current;
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        @Override
        public PlanNode rewriteLimit(LimitNode node, Set<Symbol> expectedOutputs, PlanRewriter<Set<Symbol>> planRewriter)
        {
            PlanNode source = planRewriter.rewrite(node.getSource(), expectedOutputs);
            return new LimitNode(node.getId(), source, node.getCount());
        }
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Related Classes of com.facebook.presto.sql.planner.plan.LimitNode

  • com.facebook.presto.sql.planner.DistributedLogicalPlanner$Visitor
  • com.facebook.presto.sql.planner.optimizations.LimitPushDown$Rewriter
  • com.facebook.presto.sql.planner.optimizations.MaterializeSamplePullUp$Rewriter
  • com.facebook.presto.sql.planner.optimizations.PruneUnreferencedOutputs$Rewriter
  • com.facebook.presto.sql.planner.optimizations.UnaliasSymbolReferences$Rewriter
  • com.facebook.presto.sql.planner.optimizations.WindowFilterPushDown$Rewriter
  • com.facebook.presto.sql.planner.QueryPlanner
  • com.facebook.presto.sql.planner.TestEffectivePredicateExtractor
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