Examples with SUPPORTS_JOIN_PUSHDOWN_WITH_FULL_JOIN io.trino.testing.TestingConnectorBehavior.SUPPORTS_JOIN_PUSHDOWN_WITH_FULL_JOIN used on opensource projects

Example 1 with SUPPORTS_JOIN_PUSHDOWN_WITH_FULL_JOIN

use of io.trino.testing.TestingConnectorBehavior.SUPPORTS_JOIN_PUSHDOWN_WITH_FULL_JOIN in project trino by trinodb.

the class BaseJdbcConnectorTest method testJoinPushdown.

@Test
public void testJoinPushdown() {
    PlanMatchPattern joinOverTableScans = node(JoinNode.class, anyTree(node(TableScanNode.class)), anyTree(node(TableScanNode.class)));
    PlanMatchPattern broadcastJoinOverTableScans = node(JoinNode.class, node(TableScanNode.class), exchange(ExchangeNode.Scope.LOCAL, exchange(ExchangeNode.Scope.REMOTE, ExchangeNode.Type.REPLICATE, node(TableScanNode.class))));
    Session session = joinPushdownEnabled(getSession());
    if (!hasBehavior(SUPPORTS_JOIN_PUSHDOWN)) {
        assertThat(query(session, "SELECT r.name, n.name FROM nation n JOIN region r ON n.regionkey = r.regionkey")).isNotFullyPushedDown(joinOverTableScans);
        return;
    }
    // Disable DF here for the sake of negative test cases' expected plan. With DF enabled, some operators return in DF's FilterNode and some do not.
    Session withoutDynamicFiltering = Session.builder(session).setSystemProperty("enable_dynamic_filtering", "false").build();
    String notDistinctOperator = "IS NOT DISTINCT FROM";
    List<String> nonEqualities = Stream.concat(Stream.of(JoinCondition.Operator.values()).filter(operator -> operator != JoinCondition.Operator.EQUAL).map(JoinCondition.Operator::getValue), Stream.of(notDistinctOperator)).collect(toImmutableList());
    try (TestTable nationLowercaseTable = new TestTable(// If a connector supports Join pushdown, but does not allow CTAS, we need to make the table creation here overridable.
    getQueryRunner()::execute, "nation_lowercase", "AS SELECT nationkey, lower(name) name, regionkey FROM nation")) {
        // basic case
        assertThat(query(session, "SELECT r.name, n.name FROM nation n JOIN region r ON n.regionkey = r.regionkey")).isFullyPushedDown();
        // join over different columns
        assertThat(query(session, "SELECT r.name, n.name FROM nation n JOIN region r ON n.nationkey = r.regionkey")).isFullyPushedDown();
        // pushdown when using USING
        assertThat(query(session, "SELECT r.name, n.name FROM nation n JOIN region r USING(regionkey)")).isFullyPushedDown();
        // varchar equality predicate
        assertConditionallyPushedDown(session, "SELECT n.name, n2.regionkey FROM nation n JOIN nation n2 ON n.name = n2.name", hasBehavior(SUPPORTS_JOIN_PUSHDOWN_WITH_VARCHAR_EQUALITY), joinOverTableScans);
        assertConditionallyPushedDown(session, format("SELECT n.name, nl.regionkey FROM nation n JOIN %s nl ON n.name = nl.name", nationLowercaseTable.getName()), hasBehavior(SUPPORTS_JOIN_PUSHDOWN_WITH_VARCHAR_EQUALITY), joinOverTableScans);
        // multiple bigint predicates
        assertThat(query(session, "SELECT n.name, c.name FROM nation n JOIN customer c ON n.nationkey = c.nationkey and n.regionkey = c.custkey")).isFullyPushedDown();
        // inequality
        for (String operator : nonEqualities) {
            // bigint inequality predicate
            assertThat(query(withoutDynamicFiltering, format("SELECT r.name, n.name FROM nation n JOIN region r ON n.regionkey %s r.regionkey", operator))).isNotFullyPushedDown(broadcastJoinOverTableScans);
            // varchar inequality predicate
            assertThat(query(withoutDynamicFiltering, format("SELECT n.name, nl.name FROM nation n JOIN %s nl ON n.name %s nl.name", nationLowercaseTable.getName(), operator))).isNotFullyPushedDown(broadcastJoinOverTableScans);
        }
        // inequality along with an equality, which constitutes an equi-condition and allows filter to remain as part of the Join
        for (String operator : nonEqualities) {
            assertConditionallyPushedDown(session, format("SELECT n.name, c.name FROM nation n JOIN customer c ON n.nationkey = c.nationkey AND n.regionkey %s c.custkey", operator), expectJoinPushdown(operator), joinOverTableScans);
        }
        // varchar inequality along with an equality, which constitutes an equi-condition and allows filter to remain as part of the Join
        for (String operator : nonEqualities) {
            assertConditionallyPushedDown(session, format("SELECT n.name, nl.name FROM nation n JOIN %s nl ON n.regionkey = nl.regionkey AND n.name %s nl.name", nationLowercaseTable.getName(), operator), expectVarcharJoinPushdown(operator), joinOverTableScans);
        }
        // LEFT JOIN
        assertThat(query(session, "SELECT r.name, n.name FROM nation n LEFT JOIN region r ON n.nationkey = r.regionkey")).isFullyPushedDown();
        assertThat(query(session, "SELECT r.name, n.name FROM region r LEFT JOIN nation n ON n.nationkey = r.regionkey")).isFullyPushedDown();
        // RIGHT JOIN
        assertThat(query(session, "SELECT r.name, n.name FROM nation n RIGHT JOIN region r ON n.nationkey = r.regionkey")).isFullyPushedDown();
        assertThat(query(session, "SELECT r.name, n.name FROM region r RIGHT JOIN nation n ON n.nationkey = r.regionkey")).isFullyPushedDown();
        // FULL JOIN
        assertConditionallyPushedDown(session, "SELECT r.name, n.name FROM nation n FULL JOIN region r ON n.nationkey = r.regionkey", hasBehavior(SUPPORTS_JOIN_PUSHDOWN_WITH_FULL_JOIN), joinOverTableScans);
        // Join over a (double) predicate
        assertThat(query(session, "" + "SELECT c.name, n.name " + "FROM (SELECT * FROM customer WHERE acctbal > 8000) c " + "JOIN nation n ON c.custkey = n.nationkey")).isFullyPushedDown();
        // Join over a varchar equality predicate
        assertConditionallyPushedDown(session, "SELECT c.name, n.name FROM (SELECT * FROM customer WHERE address = 'TcGe5gaZNgVePxU5kRrvXBfkasDTea') c " + "JOIN nation n ON c.custkey = n.nationkey", hasBehavior(SUPPORTS_PREDICATE_PUSHDOWN_WITH_VARCHAR_EQUALITY), joinOverTableScans);
        // Join over a varchar inequality predicate
        assertConditionallyPushedDown(session, "SELECT c.name, n.name FROM (SELECT * FROM customer WHERE address < 'TcGe5gaZNgVePxU5kRrvXBfkasDTea') c " + "JOIN nation n ON c.custkey = n.nationkey", hasBehavior(SUPPORTS_PREDICATE_PUSHDOWN_WITH_VARCHAR_INEQUALITY), joinOverTableScans);
        // join over aggregation
        assertConditionallyPushedDown(session, "SELECT * FROM (SELECT regionkey rk, count(nationkey) c FROM nation GROUP BY regionkey) n " + "JOIN region r ON n.rk = r.regionkey", hasBehavior(SUPPORTS_AGGREGATION_PUSHDOWN), joinOverTableScans);
        // join over LIMIT
        assertConditionallyPushedDown(session, "SELECT * FROM (SELECT nationkey FROM nation LIMIT 30) n " + "JOIN region r ON n.nationkey = r.regionkey", hasBehavior(SUPPORTS_LIMIT_PUSHDOWN), joinOverTableScans);
        // join over TopN
        assertConditionallyPushedDown(session, "SELECT * FROM (SELECT nationkey FROM nation ORDER BY regionkey LIMIT 5) n " + "JOIN region r ON n.nationkey = r.regionkey", hasBehavior(SUPPORTS_TOPN_PUSHDOWN), joinOverTableScans);
        // join over join
        assertThat(query(session, "SELECT * FROM nation n, region r, customer c WHERE n.regionkey = r.regionkey AND r.regionkey = c.custkey")).isFullyPushedDown();
    }
}