Examples with SINGLE com.facebook.presto.spi.plan.AggregationNode.Step.SINGLE used on opensource projects

Example 1 with SINGLE

use of com.facebook.presto.spi.plan.AggregationNode.Step.SINGLE in project presto by prestodb.

the class SingleDistinctAggregationToGroupBy method apply.

@Override
public Result apply(AggregationNode aggregation, Captures captures, Context context) {
    List<Set<RowExpression>> argumentSets = extractArgumentSets(aggregation).collect(Collectors.toList());
    Set<VariableReferenceExpression> variables = Iterables.getOnlyElement(argumentSets).stream().map(OriginalExpressionUtils::castToExpression).map(context.getVariableAllocator()::toVariableReference).collect(Collectors.toSet());
    return Result.ofPlanNode(new AggregationNode(aggregation.getSourceLocation(), aggregation.getId(), new AggregationNode(aggregation.getSourceLocation(), context.getIdAllocator().getNextId(), aggregation.getSource(), ImmutableMap.of(), singleGroupingSet(ImmutableList.<VariableReferenceExpression>builder().addAll(aggregation.getGroupingKeys()).addAll(variables).build()), ImmutableList.of(), SINGLE, Optional.empty(), Optional.empty()), // remove DISTINCT flag from function calls
    aggregation.getAggregations().entrySet().stream().collect(Collectors.toMap(Map.Entry::getKey, e -> removeDistinct(e.getValue()))), aggregation.getGroupingSets(), emptyList(), aggregation.getStep(), aggregation.getHashVariable(), aggregation.getGroupIdVariable()));
}

Example 2 with SINGLE

use of com.facebook.presto.spi.plan.AggregationNode.Step.SINGLE in project presto by prestodb.

the class TestPushPartialAggregationThroughExchange method testNoPartialAggregationWhenReductionBelowThreshold.

@Test
public void testNoPartialAggregationWhenReductionBelowThreshold() {
    tester().assertThat(new PushPartialAggregationThroughExchange(getFunctionManager())).setSystemProperty(PARTIAL_AGGREGATION_STRATEGY, "AUTOMATIC").on(p -> {
        VariableReferenceExpression a = p.variable("a", DOUBLE);
        VariableReferenceExpression b = p.variable("b", DOUBLE);
        return p.aggregation(ab -> ab.source(p.exchange(e -> e.addSource(p.values(new PlanNodeId("values"), a, b)).addInputsSet(a, b).singleDistributionPartitioningScheme(a, b))).addAggregation(p.variable("SUM", DOUBLE), expression("SUM(a)"), ImmutableList.of(DOUBLE)).singleGroupingSet(b).step(SINGLE));
    }).overrideStats("values", PlanNodeStatsEstimate.builder().setOutputRowCount(1000).addVariableStatistics(variable("b", DOUBLE), new VariableStatsEstimate(0, 100, 0, 8, 800)).setConfident(true).build()).doesNotFire();
}

Example 3 with SINGLE

use of com.facebook.presto.spi.plan.AggregationNode.Step.SINGLE in project presto by prestodb.

the class TestValidateStreamingAggregations method testValidateSuccessful.

@Test
public void testValidateSuccessful() {
    validatePlan(p -> p.aggregation(a -> a.step(SINGLE).singleGroupingSet(p.variable("nationkey")).source(p.tableScan(nationTableHandle, ImmutableList.of(p.variable("nationkey", BIGINT)), ImmutableMap.of(p.variable("nationkey", BIGINT), new TpchColumnHandle("nationkey", BIGINT))))));
    validatePlan(p -> p.aggregation(a -> a.step(SINGLE).singleGroupingSet(p.variable("unique"), p.variable("nationkey")).preGroupedVariables(p.variable("unique"), p.variable("nationkey")).source(p.assignUniqueId(p.variable("unique"), p.tableScan(nationTableHandle, ImmutableList.of(p.variable("nationkey", BIGINT)), ImmutableMap.of(p.variable("nationkey", BIGINT), new TpchColumnHandle("nationkey", BIGINT)))))));
}