Examples with Join io.prestosql.sql.tree.Join used on opensource projects

Example 1 with Join

use of io.prestosql.sql.tree.Join in project hetu-core by openlookeng.

the class AstBuilder method visitQuerySpecification.

@Override
public Node visitQuerySpecification(SqlBaseParser.QuerySpecificationContext context) {
    Optional<Relation> from = Optional.empty();
    List<SelectItem> selectItems = visit(context.selectItem(), SelectItem.class);
    List<Relation> relations = visit(context.relation(), Relation.class);
    if (!relations.isEmpty()) {
        // synthesize implicit join nodes
        Iterator<Relation> iterator = relations.iterator();
        Relation relation = iterator.next();
        while (iterator.hasNext()) {
            relation = new Join(getLocation(context), Join.Type.IMPLICIT, relation, iterator.next(), Optional.empty());
        }
        from = Optional.of(relation);
    }
    return new QuerySpecification(getLocation(context), new Select(getLocation(context.SELECT()), isDistinct(context.setQuantifier()), selectItems), from, visitIfPresent(context.where, Expression.class), visitIfPresent(context.groupBy(), GroupBy.class), visitIfPresent(context.having, Expression.class), Optional.empty(), Optional.empty(), Optional.empty());
}

Example 2 with Join

use of io.prestosql.sql.tree.Join in project hetu-core by openlookeng.

the class AstBuilder method visitJoinRelation.

// *************** from clause *****************
@Override
public Node visitJoinRelation(SqlBaseParser.JoinRelationContext context) {
    Relation left = (Relation) visit(context.left);
    Relation right;
    if (context.CROSS() != null) {
        right = (Relation) visit(context.right);
        return new Join(getLocation(context), Join.Type.CROSS, left, right, Optional.empty());
    }
    JoinCriteria criteria;
    if (context.NATURAL() != null) {
        right = (Relation) visit(context.right);
        criteria = new NaturalJoin();
    } else {
        right = (Relation) visit(context.rightRelation);
        if (context.joinCriteria().ON() != null) {
            criteria = new JoinOn((Expression) visit(context.joinCriteria().booleanExpression()));
        } else if (context.joinCriteria().USING() != null) {
            criteria = new JoinUsing(visit(context.joinCriteria().identifier(), Identifier.class));
        } else {
            throw new IllegalArgumentException("Unsupported join criteria");
        }
    }
    Join.Type joinType;
    if (context.joinType().LEFT() != null) {
        joinType = Join.Type.LEFT;
    } else if (context.joinType().RIGHT() != null) {
        joinType = Join.Type.RIGHT;
    } else if (context.joinType().FULL() != null) {
        joinType = Join.Type.FULL;
    } else {
        joinType = Join.Type.INNER;
    }
    return new Join(getLocation(context), joinType, left, right, Optional.of(criteria));
}

Example 3 with Join

use of io.prestosql.sql.tree.Join in project hetu-core by openlookeng.

the class TestSqlParser method testJoinPrecedence.

@Test
public void testJoinPrecedence() {
    assertStatement("SELECT * FROM a CROSS JOIN b LEFT JOIN c ON true", simpleQuery(selectList(new AllColumns()), new Join(Join.Type.LEFT, new Join(Join.Type.CROSS, new Table(QualifiedName.of("a")), new Table(QualifiedName.of("b")), Optional.empty()), new Table(QualifiedName.of("c")), Optional.of(new JoinOn(BooleanLiteral.TRUE_LITERAL)))));
    assertStatement("SELECT * FROM a CROSS JOIN b NATURAL JOIN c CROSS JOIN d NATURAL JOIN e", simpleQuery(selectList(new AllColumns()), new Join(Join.Type.INNER, new Join(Join.Type.CROSS, new Join(Join.Type.INNER, new Join(Join.Type.CROSS, new Table(QualifiedName.of("a")), new Table(QualifiedName.of("b")), Optional.empty()), new Table(QualifiedName.of("c")), Optional.of(new NaturalJoin())), new Table(QualifiedName.of("d")), Optional.empty()), new Table(QualifiedName.of("e")), Optional.of(new NaturalJoin()))));
}

Example 4 with Join

use of io.prestosql.sql.tree.Join in project hetu-core by openlookeng.

the class TestSqlParser method testUnnest.

@Test
public void testUnnest() {
    assertStatement("SELECT * FROM t CROSS JOIN UNNEST(a)", simpleQuery(selectList(new AllColumns()), new Join(Join.Type.CROSS, new Table(QualifiedName.of("t")), new Unnest(ImmutableList.of(new Identifier("a")), false), Optional.empty())));
    assertStatement("SELECT * FROM t CROSS JOIN UNNEST(a, b) WITH ORDINALITY", simpleQuery(selectList(new AllColumns()), new Join(Join.Type.CROSS, new Table(QualifiedName.of("t")), new Unnest(ImmutableList.of(new Identifier("a"), new Identifier("b")), true), Optional.empty())));
    assertStatement("SELECT * FROM t FULL JOIN UNNEST(a) AS tmp (c) ON true", simpleQuery(selectList(new AllColumns()), new Join(Join.Type.FULL, new Table(QualifiedName.of("t")), new AliasedRelation(new Unnest(ImmutableList.of(new Identifier("a")), false), new Identifier("tmp"), ImmutableList.of(new Identifier("c"))), Optional.of(new JoinOn(BooleanLiteral.TRUE_LITERAL)))));
}

Example 5 with Join

use of io.prestosql.sql.tree.Join in project hetu-core by openlookeng.

the class HiveAstBuilder method visitJoinRelation.

// *************** from clause *****************
@Override
public Node visitJoinRelation(HiveSqlParser.JoinRelationContext context) {
    Relation leftRelation = (Relation) visit(context.left);
    Relation rightRelation;
    Optional<JoinCriteria> criteria = Optional.empty();
    // Semi Join
    if (context.semiJoin() != null) {
        addDiff(DiffType.UNSUPPORTED, context.semiJoin().LEFT().getText(), "[LEFT SEMI JOIN] is not supported");
        addDiff(DiffType.UNSUPPORTED, context.semiJoin().SEMI().getText(), null);
        addDiff(DiffType.UNSUPPORTED, context.semiJoin().JOIN().getText(), null);
        throw unsupportedError(ErrorType.UNSUPPORTED_STATEMENT, "Unsupported statement: Left semi join", context.semiJoin());
    }
    // Cross join
    if (context.crossJoin() != null) {
        if (context.crossJoin().joinCriteria() != null) {
            addDiff(DiffType.UNSUPPORTED, context.crossJoin().CROSS().getText(), "[CROSS JOIN] must not contain join condition");
            addDiff(DiffType.UNSUPPORTED, context.crossJoin().JOIN().getText(), null);
            throw unsupportedError(ErrorType.UNSUPPORTED_STATEMENT, "Unsupported statement: Cross join must not contain join condition", context.crossJoin().joinCriteria());
        }
        rightRelation = (Relation) visit(context.crossJoin().right);
        return new Join(getLocation(context), Join.Type.CROSS, leftRelation, rightRelation, criteria);
    }
    // Inner join
    if (context.innerJoin() != null) {
        if (context.innerJoin().joinCriteria() == null) {
            if (context.innerJoin().INNER() != null) {
                addDiff(DiffType.UNSUPPORTED, context.innerJoin().INNER().getText(), null);
            }
            addDiff(DiffType.UNSUPPORTED, context.innerJoin().JOIN().getText(), "[INNER JOIN] must contain join condition");
            throw unsupportedError(ErrorType.UNSUPPORTED_STATEMENT, "Unsupported statement: Inner join must contain join condition", context.innerJoin());
        }
        rightRelation = (Relation) visit(context.innerJoin().right);
        criteria = Optional.of(new JoinOn((Expression) visit(context.innerJoin().joinCriteria().booleanExpression())));
        return new Join(getLocation(context), Join.Type.INNER, leftRelation, rightRelation, criteria);
    }
    // Outer join
    HiveSqlParser.OuterJoinContext outerJoinContext = context.outerJoin();
    // Get join type
    Join.Type joinType;
    if (outerJoinContext.joinType().LEFT() != null) {
        joinType = Join.Type.LEFT;
    } else if (outerJoinContext.joinType().RIGHT() != null) {
        joinType = Join.Type.RIGHT;
    } else {
        joinType = Join.Type.FULL;
    }
    // Get right relation
    rightRelation = (Relation) visit(outerJoinContext.rightRelation);
    // Get join criteria
    criteria = Optional.of(new JoinOn((Expression) visit(outerJoinContext.joinCriteria().booleanExpression())));
    return new Join(getLocation(context), joinType, leftRelation, rightRelation, criteria);
}