Examples of io.crate.planner.projection.AggregationProjection

io.crate.planner.projection.AggregationProjection
A projection which aggregates all inputs to a single row


    @Test
    public void testGetOutputStreamersFromCollectNodeWithAggregations() throws Exception {
        CollectNode collectNode = new CollectNode("bla", new Routing(new HashMap<String, Map<String, Set<Integer>>>()));
        collectNode.outputTypes(Arrays.<DataType>asList(DataTypes.BOOLEAN, null, null, DataTypes.DOUBLE));
        AggregationProjection aggregationProjection = new AggregationProjection();
        aggregationProjection.aggregations(Arrays.asList( // not a real use case, only for test convenience, sorry
                new Aggregation(maxInfo, Arrays.<Symbol>asList(new InputColumn(0)), Aggregation.Step.ITER, Aggregation.Step.FINAL),
                new Aggregation(maxInfo, Arrays.<Symbol>asList(new InputColumn(1)), Aggregation.Step.ITER, Aggregation.Step.PARTIAL)
        ));
        collectNode.projections(Arrays.<Projection>asList(aggregationProjection));
        PlanNodeStreamerVisitor.Context ctx = visitor.process(collectNode);

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    @Test
    public void testGetInputStreamersForMergeNodeWithAggregations() throws Exception {
        MergeNode mergeNode = new MergeNode("mörtsch", 2);
        mergeNode.inputTypes(Arrays.<DataType>asList(DataTypes.UNDEFINED, DataTypes.TIMESTAMP));
        AggregationProjection aggregationProjection = new AggregationProjection();
        aggregationProjection.aggregations(Arrays.asList(
                new Aggregation(maxInfo, Arrays.<Symbol>asList(new InputColumn(0)), Aggregation.Step.PARTIAL, Aggregation.Step.FINAL)
        ));
        mergeNode.projections(Arrays.<Projection>asList(aggregationProjection));
        PlanNodeStreamerVisitor.Context ctx = visitor.process(mergeNode);
        Streamer<?>[] streamers = ctx.inputStreamers();

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        }
    }


    @Test
    public void testAggregationProjector() throws ExecutionException, InterruptedException {
        AggregationProjection projection = new AggregationProjection();
        projection.aggregations(Arrays.asList(
                new Aggregation(avgInfo, Arrays.<Symbol>asList(new InputColumn(1)), Aggregation.Step.ITER, Aggregation.Step.FINAL),
                new Aggregation(countInfo, Arrays.<Symbol>asList(new InputColumn(0)), Aggregation.Step.ITER, Aggregation.Step.FINAL)
        ));
        Projector projector = visitor.process(projection);
        CollectingProjector collectingProjector = new CollectingProjector();

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        CollectNode collectNode = new CollectNode(
                "count",
                table.getRouting(WhereClause.MATCH_ALL),
                ImmutableList.<Symbol>of(),
                Arrays.<Projection>asList(new AggregationProjection(ImmutableList.of(countAggregationPartial))));
        collectNode.maxRowGranularity(RowGranularity.DOC);
        collectNode.outputTypes(ImmutableList.<DataType>of(DataTypes.UNDEFINED));
        MergeNode mergeNode = new MergeNode("local count merge", collectNode.executionNodes().size());
        mergeNode.projections(ImmutableList.<Projection>of(new AggregationProjection(ImmutableList.of(countAggregationFinal))));
        Plan plan = new Plan();
        plan.add(collectNode);
        plan.add(mergeNode);
        return plan;
    }

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Related Classes of io.crate.planner.projection.AggregationProjection

io.crate.action.sql.DDLAnalysisDispatcher

io.crate.operation.projectors.ProjectionToProjectorVisitorTest

io.crate.planner.node.PlanNodeStreamerVisitorTest

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