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

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

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

            current.setRoot(new TopNNode(node.getId(), current.getRoot(), node.getCount(), node.getOrderBy(), node.getOrderings(), false));

            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());
                TopNNode merge = new TopNNode(idAllocator.getNextId(), source, node.getCount(), node.getOrderBy(), node.getOrderings(), true);
                current = createSingleNodePlan(merge)
                        .addChild(current.build());
            }

            return current;
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    @Test
    public void testTopN()
            throws Exception
    {
        PlanNode node = new TopNNode(newId(),
                filter(baseTableScan,
                        and(
                                equals(AE, BE),
                                equals(BE, CE),
                                lessThan(CE, number(10)))),
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    @Test
    public void testTopN()
            throws Exception
    {
        PlanNode node = new TopNNode(newId(),
                filter(baseTableScan,
                        and(
                                equals(AE, BE),
                                equals(BE, CE),
                                lessThan(CE, number(10)))),
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    @Test
    public void testTopN()
            throws Exception
    {
        PlanNode node = new TopNNode(newId(),
                filter(baseTableScan,
                        and(
                                equals(AE, BE),
                                equals(BE, CE),
                                lessThan(CE, number(10)))),
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    @Test
    public void testTopN()
            throws Exception
    {
        PlanNode node = new TopNNode(newId(),
                filter(baseTableScan,
                        and(
                                equals(AE, BE),
                                equals(BE, CE),
                                lessThan(CE, number(10)))),
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            long count = node.getCount();
            if (context != null) {
                count = Math.min(count, context.getCount());
            }
            return new TopNNode(node.getId(), rewrittenSource, count, node.getOrderBy(), node.getOrderings(), node.isPartial());
        }
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        @Override
        public PlanNode rewriteSort(SortNode node, LimitContext context, PlanRewriter<LimitContext> planRewriter)
        {
            PlanNode rewrittenSource = planRewriter.rewrite(node.getSource(), null);
            if (context != null) {
                return new TopNNode(node.getId(), rewrittenSource, context.getCount(), node.getOrderBy(), node.getOrderings(), false);
            }
            else if (rewrittenSource != node.getSource()) {
                return new SortNode(node.getId(), rewrittenSource, node.getOrderBy(), node.getOrderings());
            }
            return node;
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                    .addAll(expectedOutputs)
                    .addAll(node.getOrderBy());

            PlanNode source = planRewriter.rewrite(node.getSource(), expectedInputs.build());

            return new TopNNode(node.getId(), source, node.getCount(), node.getOrderBy(), node.getOrderings(), node.isPartial());
        }
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                PlanNode rewrittenNode = planRewriter.rewrite(node, null);
                WindowNode windowNode = context.getWindowNode().get();
                if (windowNode.getOrderBy().isEmpty()) {
                    return new LimitNode(idAllocator.getNextId(), rewrittenNode, ((LongLiteral) context.getExpression()).getValue());
                }
                return new TopNNode(
                        idAllocator.getNextId(),
                        rewrittenNode,
                        ((LongLiteral) context.getExpression()).getValue(),
                        windowNode.getOrderBy(),
                        windowNode.getOrderings(),
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                Symbol canonical = canonicalize(symbol);
                symbols.add(canonical);
                orderings.put(canonical, node.getOrderings().get(symbol));
            }

            return new TopNNode(node.getId(), source, node.getCount(), symbols.build(), orderings.build(), node.isPartial());
        }
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Related Classes of com.facebook.presto.sql.planner.plan.TopNNode

  • 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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