Examples with FORCE_SINGLE_NODE_OUTPUT com.facebook.presto.SystemSessionProperties.FORCE_SINGLE_NODE_OUTPUT used on opensource projects

Example 1 with FORCE_SINGLE_NODE_OUTPUT

use of com.facebook.presto.SystemSessionProperties.FORCE_SINGLE_NODE_OUTPUT in project presto by prestodb.

the class TestLogicalPlanner method testBroadcastCorrelatedSubqueryAvoidsRemoteExchangeBeforeAggregation.

@Test
public void testBroadcastCorrelatedSubqueryAvoidsRemoteExchangeBeforeAggregation() {
    Session broadcastJoin = Session.builder(this.getQueryRunner().getDefaultSession()).setSystemProperty(JOIN_DISTRIBUTION_TYPE, JoinDistributionType.BROADCAST.name()).setSystemProperty(FORCE_SINGLE_NODE_OUTPUT, Boolean.toString(false)).build();
    // make sure there is a remote exchange on the build side
    PlanMatchPattern joinBuildSideWithRemoteExchange = anyTree(node(JoinNode.class, anyTree(node(TableScanNode.class)), anyTree(exchange(REMOTE_STREAMING, ExchangeNode.Type.REPLICATE, anyTree(node(TableScanNode.class))))));
    // validates that there exists only one remote exchange
    Consumer<Plan> validateSingleRemoteExchange = plan -> assertEquals(countOfMatchingNodes(plan, node -> node instanceof ExchangeNode && ((ExchangeNode) node).getScope().isRemote()), 1);
    Consumer<Plan> validateSingleStreamingAggregation = plan -> assertEquals(countOfMatchingNodes(plan, node -> node instanceof AggregationNode && ((AggregationNode) node).getGroupingKeys().contains(new VariableReferenceExpression(Optional.empty(), "unique", BIGINT)) && ((AggregationNode) node).isStreamable()), 1);
    // region is unpartitioned, AssignUniqueId should provide satisfying partitioning for count(*) after LEFT JOIN
    assertPlanWithSession("SELECT (SELECT COUNT(*) FROM region r2 WHERE r2.regionkey > r1.regionkey) FROM region r1", broadcastJoin, false, joinBuildSideWithRemoteExchange, validateSingleRemoteExchange.andThen(validateSingleStreamingAggregation));
    // orders is naturally partitioned, AssignUniqueId should not overwrite its natural partitioning
    assertPlanWithSession("SELECT COUNT(COUNT) " + "FROM (SELECT o1.orderkey orderkey, (SELECT COUNT(*) FROM orders o2 WHERE o2.orderkey > o1.orderkey) COUNT FROM orders o1) " + "GROUP BY orderkey", broadcastJoin, false, joinBuildSideWithRemoteExchange, validateSingleRemoteExchange.andThen(validateSingleStreamingAggregation));
}