Examples with StraightJoin com.alibaba.cobar.parser.ast.fragment.tableref.StraightJoin used on opensource projects

Example 1 with StraightJoin

use of com.alibaba.cobar.parser.ast.fragment.tableref.StraightJoin in project cobar by alibaba.

the class MySQLDMLParserTest method testTR1.

public void testTR1() throws SQLSyntaxErrorException {
    String sql = "(select * from `select`) as `select`";
    MySQLLexer lexer = new MySQLLexer(sql);
    MySQLDMLParser parser = getDMLParser(lexer);
    TableReferences trs = parser.tableRefs();
    String output = output2MySQL(trs, sql);
    List<TableReference> list = trs.getTableReferenceList();
    Assert.assertEquals(1, list.size());
    Assert.assertEquals(SubqueryFactor.class, list.get(0).getClass());
    Assert.assertEquals("(SELECT * FROM `select`) AS `SELECT`", output);
    sql = "(((selecT * from any)union select `select` from `from` order by dd) as 'a1', (((t2)))), t3";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    list = trs.getTableReferenceList();
    Assert.assertEquals(2, list.size());
    Assert.assertEquals(TableReferences.class, list.get(0).getClass());
    Assert.assertEquals(TableRefFactor.class, list.get(1).getClass());
    list = ((TableReferences) list.get(0)).getTableReferenceList();
    Assert.assertEquals(2, list.size());
    Assert.assertEquals(SubqueryFactor.class, list.get(0).getClass());
    Assert.assertEquals(TableReferences.class, list.get(1).getClass());
    Assert.assertEquals("((SELECT * FROM any) UNION (SELECT `select` FROM `from` ORDER BY dd)) AS 'a1', t2, t3", output);
    sql = "(t1)";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    list = trs.getTableReferenceList();
    Assert.assertEquals(1, list.size());
    TableReference tr = list.get(0);
    Assert.assertEquals(TableReferences.class, tr.getClass());
    list = ((TableReferences) tr).getTableReferenceList();
    Assert.assertEquals(1, list.size());
    Assert.assertEquals(TableRefFactor.class, list.get(0).getClass());
    Assert.assertEquals("t1", output);
    sql = "(t1,t2,(t3))";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    list = trs.getTableReferenceList();
    Assert.assertEquals(1, list.size());
    Assert.assertEquals(TableReferences.class, list.get(0).getClass());
    tr = (TableReferences) list.get(0);
    Assert.assertEquals(TableReferences.class, tr.getClass());
    list = ((TableReferences) tr).getTableReferenceList();
    Assert.assertEquals(3, list.size());
    Assert.assertEquals(TableRefFactor.class, list.get(0).getClass());
    Assert.assertEquals(TableRefFactor.class, list.get(1).getClass());
    Assert.assertEquals(TableRefFactor.class, list.get(1).getClass());
    Assert.assertEquals("t1, t2, t3", output);
    sql = "(tb1 as t1)inner join (tb2 as t2) on t1.name=t2.name";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    list = trs.getTableReferenceList();
    Assert.assertEquals(1, list.size());
    Assert.assertEquals(InnerJoin.class, list.get(0).getClass());
    tr = ((InnerJoin) list.get(0)).getLeftTableRef();
    Assert.assertEquals(TableReferences.class, tr.getClass());
    list = ((TableReferences) tr).getTableReferenceList();
    Assert.assertEquals(1, list.size());
    Assert.assertEquals(TableRefFactor.class, list.get(0).getClass());
    Expression ex = ((InnerJoin) (trs.getTableReferenceList()).get(0)).getOnCond();
    Assert.assertEquals(ex.getClass(), ComparisionEqualsExpression.class);
    Assert.assertEquals("(tb1 AS T1) INNER JOIN (tb2 AS T2) ON t1.name = t2.name", output);
    sql = "(tb1 as t1)inner join tb2 as t2 using (c1)";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    List<String> using_list = ((InnerJoin) (trs.getTableReferenceList()).get(0)).getUsing();
    Assert.assertEquals(1, using_list.size());
    Assert.assertEquals("(tb1 AS T1) INNER JOIN tb2 AS T2 USING (c1)", output);
    sql = "(tb1 as t1)inner join tb2 as t2 using (c1,c2)";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    using_list = ((InnerJoin) (trs.getTableReferenceList()).get(0)).getUsing();
    Assert.assertEquals(2, using_list.size());
    Assert.assertEquals("(tb1 AS T1) INNER JOIN tb2 AS T2 USING (c1, c2)", output);
    sql = "tb1 as t1 use index (i1,i2,i3)";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    list = trs.getTableReferenceList();
    Assert.assertEquals(1, list.size());
    Assert.assertEquals(TableRefFactor.class, list.get(0).getClass());
    List<IndexHint> hintlist = ((TableRefFactor) (trs.getTableReferenceList()).get(0)).getHintList();
    Assert.assertEquals(1, hintlist.size());
    IndexHint indexhint = hintlist.get(0);
    Assert.assertEquals(3, indexhint.getIndexList().size());
    Assert.assertEquals("USE", indexhint.getAction().name());
    Assert.assertEquals("INDEX", indexhint.getType().name());
    Assert.assertEquals("tb1 AS T1 USE INDEX (i1, i2, i3)", output);
    sql = "tb1 as t1 use index (i1,i2,i3),tb2 as t2 use index (i1,i2,i3)";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    list = trs.getTableReferenceList();
    Assert.assertEquals(2, list.size());
    Assert.assertEquals(TableRefFactor.class, list.get(0).getClass());
    hintlist = ((TableRefFactor) (trs.getTableReferenceList()).get(0)).getHintList();
    Assert.assertEquals(1, hintlist.size());
    indexhint = hintlist.get(0);
    Assert.assertEquals(3, indexhint.getIndexList().size());
    Assert.assertEquals("USE", indexhint.getAction().name());
    Assert.assertEquals("INDEX", indexhint.getType().name());
    hintlist = ((TableRefFactor) (trs.getTableReferenceList()).get(1)).getHintList();
    Assert.assertEquals(1, hintlist.size());
    indexhint = hintlist.get(0);
    Assert.assertEquals(3, indexhint.getIndexList().size());
    Assert.assertEquals("USE", indexhint.getAction().name());
    Assert.assertEquals("INDEX", indexhint.getType().name());
    Assert.assertEquals("tb1 AS T1 USE INDEX (i1, i2, i3), tb2 AS T2 USE INDEX (i1, i2, i3)", output);
    sql = "tb1 as t1";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    list = trs.getTableReferenceList();
    Assert.assertEquals(1, list.size());
    Assert.assertEquals(TableRefFactor.class, list.get(0).getClass());
    Assert.assertEquals("tb1", ((TableRefFactor) (trs.getTableReferenceList()).get(0)).getTable().getIdText());
    Assert.assertEquals("T1", ((TableRefFactor) (trs.getTableReferenceList()).get(0)).getAlias());
    Assert.assertEquals("tb1 AS T1", output);
    sql = "tb1 t1";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    list = trs.getTableReferenceList();
    Assert.assertEquals(1, list.size());
    Assert.assertEquals(TableRefFactor.class, list.get(0).getClass());
    Assert.assertEquals("tb1", ((TableRefFactor) (trs.getTableReferenceList()).get(0)).getTable().getIdText());
    Assert.assertEquals("T1", ((TableRefFactor) (trs.getTableReferenceList()).get(0)).getAlias());
    Assert.assertEquals("tb1 AS T1", output);
    sql = "tb1,tb2,tb3";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    list = trs.getTableReferenceList();
    Assert.assertEquals(3, list.size());
    Assert.assertEquals(TableRefFactor.class, list.get(0).getClass());
    Assert.assertEquals("tb1", ((TableRefFactor) (trs.getTableReferenceList()).get(0)).getTable().getIdText());
    Assert.assertEquals(null, ((TableRefFactor) (trs.getTableReferenceList()).get(0)).getAlias());
    Assert.assertEquals("tb2", ((TableRefFactor) (trs.getTableReferenceList()).get(1)).getTable().getIdText());
    Assert.assertEquals("tb3", ((TableRefFactor) (trs.getTableReferenceList()).get(2)).getTable().getIdText());
    Assert.assertEquals("tb1, tb2, tb3", output);
    sql = "tb1 use key for join (i1,i2)";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    list = trs.getTableReferenceList();
    Assert.assertEquals(1, list.size());
    Assert.assertEquals(TableRefFactor.class, list.get(0).getClass());
    hintlist = ((TableRefFactor) (trs.getTableReferenceList()).get(0)).getHintList();
    Assert.assertEquals(1, hintlist.size());
    indexhint = hintlist.get(0);
    Assert.assertEquals(2, indexhint.getIndexList().size());
    Assert.assertEquals("USE", indexhint.getAction().name());
    Assert.assertEquals("KEY", indexhint.getType().name());
    Assert.assertEquals("JOIN", indexhint.getScope().name());
    Assert.assertEquals("tb1 USE KEY FOR JOIN (i1, i2)", output);
    sql = "tb1 use index for group by(i1,i2)";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    list = trs.getTableReferenceList();
    Assert.assertEquals(1, list.size());
    Assert.assertEquals(TableRefFactor.class, list.get(0).getClass());
    hintlist = ((TableRefFactor) (trs.getTableReferenceList()).get(0)).getHintList();
    Assert.assertEquals(1, hintlist.size());
    indexhint = hintlist.get(0);
    Assert.assertEquals(2, indexhint.getIndexList().size());
    Assert.assertEquals("USE", indexhint.getAction().name());
    Assert.assertEquals("INDEX", indexhint.getType().name());
    Assert.assertEquals("GROUP_BY", indexhint.getScope().name());
    Assert.assertEquals("tb1 USE INDEX FOR GROUP BY (i1, i2)", output);
    sql = "tb1 use key for order by (i1,i2) use key for group by () " + "ignore index for group by (i1,i2)";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    list = trs.getTableReferenceList();
    Assert.assertEquals(1, list.size());
    Assert.assertEquals(TableRefFactor.class, list.get(0).getClass());
    Assert.assertEquals("tb1", ((TableRefFactor) (trs.getTableReferenceList()).get(0)).getTable().getIdText());
    Assert.assertEquals(null, ((TableRefFactor) (trs.getTableReferenceList()).get(0)).getAlias());
    hintlist = ((TableRefFactor) (trs.getTableReferenceList()).get(0)).getHintList();
    Assert.assertEquals(3, hintlist.size());
    indexhint = hintlist.get(0);
    Assert.assertEquals(2, indexhint.getIndexList().size());
    Assert.assertEquals("USE", indexhint.getAction().name());
    Assert.assertEquals("KEY", indexhint.getType().name());
    Assert.assertEquals("ORDER_BY", indexhint.getScope().name());
    indexhint = hintlist.get(1);
    Assert.assertEquals(0, indexhint.getIndexList().size());
    Assert.assertEquals("USE", indexhint.getAction().name());
    Assert.assertEquals("KEY", indexhint.getType().name());
    Assert.assertEquals("GROUP_BY", indexhint.getScope().name());
    indexhint = hintlist.get(2);
    Assert.assertEquals(2, indexhint.getIndexList().size());
    Assert.assertEquals("IGNORE", indexhint.getAction().name());
    Assert.assertEquals("INDEX", indexhint.getType().name());
    Assert.assertEquals("GROUP_BY", indexhint.getScope().name());
    Assert.assertEquals("tb1 USE KEY FOR ORDER BY (i1, i2) " + "USE KEY FOR GROUP BY () IGNORE INDEX FOR GROUP BY (i1, i2)", output);
    sql = "tb1 use index for order by (i1,i2) force index for group by (i1)";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    list = trs.getTableReferenceList();
    Assert.assertEquals(1, list.size());
    Assert.assertEquals(TableRefFactor.class, list.get(0).getClass());
    Assert.assertEquals("tb1", ((TableRefFactor) (trs.getTableReferenceList()).get(0)).getTable().getIdText());
    Assert.assertEquals(null, ((TableRefFactor) (trs.getTableReferenceList()).get(0)).getAlias());
    hintlist = ((TableRefFactor) (trs.getTableReferenceList()).get(0)).getHintList();
    Assert.assertEquals(2, hintlist.size());
    indexhint = hintlist.get(0);
    Assert.assertEquals(2, indexhint.getIndexList().size());
    Assert.assertEquals("i1", indexhint.getIndexList().get(0));
    Assert.assertEquals("i2", indexhint.getIndexList().get(1));
    Assert.assertEquals("USE", indexhint.getAction().name());
    Assert.assertEquals("INDEX", indexhint.getType().name());
    Assert.assertEquals("ORDER_BY", indexhint.getScope().name());
    indexhint = hintlist.get(1);
    Assert.assertEquals(1, indexhint.getIndexList().size());
    Assert.assertEquals("FORCE", indexhint.getAction().name());
    Assert.assertEquals("INDEX", indexhint.getType().name());
    Assert.assertEquals("GROUP_BY", indexhint.getScope().name());
    Assert.assertEquals("tb1 USE INDEX FOR ORDER BY (i1, i2) FORCE INDEX FOR GROUP BY (i1)", output);
    sql = "tb1 ignore key for join (i1,i2)";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    list = trs.getTableReferenceList();
    Assert.assertEquals(1, list.size());
    Assert.assertEquals(TableRefFactor.class, list.get(0).getClass());
    Assert.assertEquals("tb1", ((TableRefFactor) (trs.getTableReferenceList()).get(0)).getTable().getIdText());
    Assert.assertEquals(null, ((TableRefFactor) (trs.getTableReferenceList()).get(0)).getAlias());
    hintlist = ((TableRefFactor) (trs.getTableReferenceList()).get(0)).getHintList();
    Assert.assertEquals(1, hintlist.size());
    indexhint = hintlist.get(0);
    Assert.assertEquals(2, indexhint.getIndexList().size());
    Assert.assertEquals("i1", indexhint.getIndexList().get(0));
    Assert.assertEquals("i2", indexhint.getIndexList().get(1));
    Assert.assertEquals("IGNORE", indexhint.getAction().name());
    Assert.assertEquals("KEY", indexhint.getType().name());
    Assert.assertEquals("JOIN", indexhint.getScope().name());
    Assert.assertEquals("tb1 IGNORE KEY FOR JOIN (i1, i2)", output);
    sql = "tb1 ignore index for group by (i1,i2)";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    list = trs.getTableReferenceList();
    Assert.assertEquals(1, list.size());
    Assert.assertEquals(TableRefFactor.class, list.get(0).getClass());
    Assert.assertEquals("tb1", ((TableRefFactor) (trs.getTableReferenceList()).get(0)).getTable().getIdText());
    Assert.assertEquals(null, ((TableRefFactor) (trs.getTableReferenceList()).get(0)).getAlias());
    hintlist = ((TableRefFactor) (trs.getTableReferenceList()).get(0)).getHintList();
    Assert.assertEquals(1, hintlist.size());
    indexhint = hintlist.get(0);
    Assert.assertEquals(2, indexhint.getIndexList().size());
    Assert.assertEquals("i1", indexhint.getIndexList().get(0));
    Assert.assertEquals("i2", indexhint.getIndexList().get(1));
    Assert.assertEquals("IGNORE", indexhint.getAction().name());
    Assert.assertEquals("INDEX", indexhint.getType().name());
    Assert.assertEquals("GROUP_BY", indexhint.getScope().name());
    Assert.assertEquals("tb1 IGNORE INDEX FOR GROUP BY (i1, i2)", output);
    sql = "(offer  a  straight_join wp_image b use key for join(t1,t2) on a.member_id=b.member_id inner join product_visit c )";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    Assert.assertEquals("offer AS A STRAIGHT_JOIN wp_image AS B USE KEY FOR JOIN (t1, t2) ON a.member_id = b.member_id INNER JOIN product_visit AS C", output);
    sql = "tb1 ignore index for order by(i1)";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    list = trs.getTableReferenceList();
    Assert.assertEquals(1, list.size());
    Assert.assertEquals(TableRefFactor.class, list.get(0).getClass());
    Assert.assertEquals("tb1", ((TableRefFactor) (trs.getTableReferenceList()).get(0)).getTable().getIdText());
    Assert.assertEquals(null, ((TableRefFactor) (trs.getTableReferenceList()).get(0)).getAlias());
    hintlist = ((TableRefFactor) (trs.getTableReferenceList()).get(0)).getHintList();
    Assert.assertEquals(1, hintlist.size());
    indexhint = hintlist.get(0);
    Assert.assertEquals(1, indexhint.getIndexList().size());
    Assert.assertEquals("i1", indexhint.getIndexList().get(0));
    Assert.assertEquals("IGNORE", indexhint.getAction().name());
    Assert.assertEquals("INDEX", indexhint.getType().name());
    Assert.assertEquals("ORDER_BY", indexhint.getScope().name());
    Assert.assertEquals("tb1 IGNORE INDEX FOR ORDER BY (i1)", output);
    sql = "tb1 force key for group by (i1,i2)";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    list = trs.getTableReferenceList();
    Assert.assertEquals(1, list.size());
    Assert.assertEquals(TableRefFactor.class, list.get(0).getClass());
    Assert.assertEquals("tb1", ((TableRefFactor) (trs.getTableReferenceList()).get(0)).getTable().getIdText());
    Assert.assertEquals(null, ((TableRefFactor) (trs.getTableReferenceList()).get(0)).getAlias());
    hintlist = ((TableRefFactor) (trs.getTableReferenceList()).get(0)).getHintList();
    Assert.assertEquals(1, hintlist.size());
    indexhint = hintlist.get(0);
    Assert.assertEquals(2, indexhint.getIndexList().size());
    Assert.assertEquals("i1", indexhint.getIndexList().get(0));
    Assert.assertEquals("i2", indexhint.getIndexList().get(1));
    Assert.assertEquals("FORCE", indexhint.getAction().name());
    Assert.assertEquals("KEY", indexhint.getType().name());
    Assert.assertEquals("GROUP_BY", indexhint.getScope().name());
    Assert.assertEquals("tb1 FORCE KEY FOR GROUP BY (i1, i2)", output);
    sql = "tb1 force index for group by (i1,i2)";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    list = trs.getTableReferenceList();
    Assert.assertEquals(1, list.size());
    Assert.assertEquals(TableRefFactor.class, list.get(0).getClass());
    Assert.assertEquals("tb1", ((TableRefFactor) (trs.getTableReferenceList()).get(0)).getTable().getIdText());
    Assert.assertEquals(null, ((TableRefFactor) (trs.getTableReferenceList()).get(0)).getAlias());
    hintlist = ((TableRefFactor) (trs.getTableReferenceList()).get(0)).getHintList();
    Assert.assertEquals(1, hintlist.size());
    indexhint = hintlist.get(0);
    Assert.assertEquals(2, indexhint.getIndexList().size());
    Assert.assertEquals("i1", indexhint.getIndexList().get(0));
    Assert.assertEquals("i2", indexhint.getIndexList().get(1));
    Assert.assertEquals("FORCE", indexhint.getAction().name());
    Assert.assertEquals("INDEX", indexhint.getType().name());
    Assert.assertEquals("GROUP_BY", indexhint.getScope().name());
    Assert.assertEquals("tb1 FORCE INDEX FOR GROUP BY (i1, i2)", output);
    sql = "tb1 force index for join (i1,i2)";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    list = trs.getTableReferenceList();
    Assert.assertEquals(1, list.size());
    Assert.assertEquals(TableRefFactor.class, list.get(0).getClass());
    Assert.assertEquals("tb1", ((TableRefFactor) (trs.getTableReferenceList()).get(0)).getTable().getIdText());
    Assert.assertEquals(null, ((TableRefFactor) (trs.getTableReferenceList()).get(0)).getAlias());
    hintlist = ((TableRefFactor) (trs.getTableReferenceList()).get(0)).getHintList();
    Assert.assertEquals(1, hintlist.size());
    indexhint = hintlist.get(0);
    Assert.assertEquals(2, indexhint.getIndexList().size());
    Assert.assertEquals("i1", indexhint.getIndexList().get(0));
    Assert.assertEquals("i2", indexhint.getIndexList().get(1));
    Assert.assertEquals("FORCE", indexhint.getAction().name());
    Assert.assertEquals("INDEX", indexhint.getType().name());
    Assert.assertEquals("JOIN", indexhint.getScope().name());
    Assert.assertEquals("tb1 FORCE INDEX FOR JOIN (i1, i2)", output);
    sql = "(tb1 force index for join (i1,i2) )left outer join tb2 as t2 " + "use index (i1,i2,i3) on t1.id1=t2.id1";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    list = trs.getTableReferenceList();
    Assert.assertEquals(1, list.size());
    Assert.assertEquals(OuterJoin.class, list.get(0).getClass());
    Assert.assertEquals(true, (((OuterJoin) list.get(0)).isLeftJoin()));
    TableReferences ltr = (TableReferences) ((OuterJoin) list.get(0)).getLeftTableRef();
    Assert.assertEquals(1, ltr.getTableReferenceList().size());
    Assert.assertEquals(TableRefFactor.class, ltr.getTableReferenceList().get(0).getClass());
    Assert.assertEquals(null, ((TableRefFactor) (ltr.getTableReferenceList().get(0))).getAlias());
    Assert.assertEquals("tb1", ((TableRefFactor) (ltr.getTableReferenceList().get(0))).getTable().getIdText());
    hintlist = ((TableRefFactor) (ltr.getTableReferenceList()).get(0)).getHintList();
    Assert.assertEquals(1, hintlist.size());
    indexhint = hintlist.get(0);
    Assert.assertEquals(2, indexhint.getIndexList().size());
    Assert.assertEquals("i1", indexhint.getIndexList().get(0));
    Assert.assertEquals("i2", indexhint.getIndexList().get(1));
    Assert.assertEquals("FORCE", indexhint.getAction().name());
    Assert.assertEquals("INDEX", indexhint.getType().name());
    Assert.assertEquals("JOIN", indexhint.getScope().name());
    TableRefFactor rtf = (TableRefFactor) ((OuterJoin) list.get(0)).getRightTableRef();
    Assert.assertEquals("T2", rtf.getAlias());
    Assert.assertEquals("tb2", rtf.getTable().getIdText());
    hintlist = rtf.getHintList();
    Assert.assertEquals(1, hintlist.size());
    indexhint = hintlist.get(0);
    Assert.assertEquals(3, indexhint.getIndexList().size());
    Assert.assertEquals("i1", indexhint.getIndexList().get(0));
    Assert.assertEquals("i2", indexhint.getIndexList().get(1));
    Assert.assertEquals("USE", indexhint.getAction().name());
    Assert.assertEquals("INDEX", indexhint.getType().name());
    Assert.assertEquals("ALL", indexhint.getScope().name());
    Assert.assertEquals(ComparisionEqualsExpression.class, ((OuterJoin) list.get(0)).getOnCond().getClass());
    Assert.assertEquals("(tb1 FORCE INDEX FOR JOIN (i1, i2)) " + "LEFT JOIN tb2 AS T2 USE INDEX (i1, i2, i3) ON t1.id1 = t2.id1", output);
    sql = " (((tb1 force index for join (i1,i2),tb3),tb4),tb5) " + "left outer join (tb2 as t2 use index (i1,i2,i3)) using(id1)";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    list = trs.getTableReferenceList();
    Assert.assertEquals(1, list.size());
    Assert.assertEquals(OuterJoin.class, list.get(0).getClass());
    Assert.assertEquals(true, (((OuterJoin) list.get(0)).isLeftJoin()));
    ltr = (TableReferences) ((OuterJoin) list.get(0)).getLeftTableRef();
    Assert.assertEquals(2, ltr.getTableReferenceList().size());
    Assert.assertEquals(TableReferences.class, ltr.getTableReferenceList().get(0).getClass());
    TableReferences ltr1 = (TableReferences) (ltr.getTableReferenceList()).get(0);
    Assert.assertEquals(2, ltr1.getTableReferenceList().size());
    Assert.assertEquals(TableReferences.class, ltr1.getTableReferenceList().get(0).getClass());
    TableReferences ltr2 = (TableReferences) (ltr1.getTableReferenceList()).get(0);
    Assert.assertEquals(2, ltr2.getTableReferenceList().size());
    Assert.assertEquals(TableRefFactor.class, ltr2.getTableReferenceList().get(0).getClass());
    Assert.assertEquals(null, ((TableRefFactor) (ltr2.getTableReferenceList().get(0))).getAlias());
    Assert.assertEquals("tb1", ((TableRefFactor) (ltr2.getTableReferenceList().get(0))).getTable().getIdText());
    hintlist = ((TableRefFactor) (ltr2.getTableReferenceList()).get(0)).getHintList();
    Assert.assertEquals(1, hintlist.size());
    indexhint = hintlist.get(0);
    Assert.assertEquals(2, indexhint.getIndexList().size());
    Assert.assertEquals("i1", indexhint.getIndexList().get(0));
    Assert.assertEquals("i2", indexhint.getIndexList().get(1));
    Assert.assertEquals("FORCE", indexhint.getAction().name());
    Assert.assertEquals("INDEX", indexhint.getType().name());
    Assert.assertEquals("JOIN", indexhint.getScope().name());
    Assert.assertEquals(TableRefFactor.class, ltr2.getTableReferenceList().get(1).getClass());
    Assert.assertEquals("tb3", ((TableRefFactor) (ltr2.getTableReferenceList().get(1))).getTable().getIdText());
    Assert.assertEquals(TableRefFactor.class, ltr1.getTableReferenceList().get(1).getClass());
    Assert.assertEquals("tb4", ((TableRefFactor) (ltr1.getTableReferenceList().get(1))).getTable().getIdText());
    Assert.assertEquals(TableRefFactor.class, ltr.getTableReferenceList().get(1).getClass());
    Assert.assertEquals("tb5", ((TableRefFactor) (ltr.getTableReferenceList().get(1))).getTable().getIdText());
    TableReferences rtr = (TableReferences) ((OuterJoin) list.get(0)).getRightTableRef();
    Assert.assertEquals("T2", ((TableRefFactor) rtr.getTableReferenceList().get(0)).getAlias());
    Assert.assertEquals("tb2", ((TableRefFactor) rtr.getTableReferenceList().get(0)).getTable().getIdText());
    hintlist = ((TableRefFactor) rtr.getTableReferenceList().get(0)).getHintList();
    Assert.assertEquals(1, hintlist.size());
    indexhint = hintlist.get(0);
    Assert.assertEquals(3, indexhint.getIndexList().size());
    Assert.assertEquals("i1", indexhint.getIndexList().get(0));
    Assert.assertEquals("i2", indexhint.getIndexList().get(1));
    Assert.assertEquals("USE", indexhint.getAction().name());
    Assert.assertEquals("INDEX", indexhint.getType().name());
    Assert.assertEquals("ALL", indexhint.getScope().name());
    using_list = ((OuterJoin) (trs.getTableReferenceList()).get(0)).getUsing();
    Assert.assertEquals(1, using_list.size());
    Assert.assertEquals("(tb1 FORCE INDEX FOR JOIN (i1, i2), tb3, tb4, tb5) " + "LEFT JOIN (tb2 AS T2 USE INDEX (i1, i2, i3)) USING (id1)", output);
    sql = "(tb1 force index for join (i1,i2),tb3) " + "left outer join tb2 as t2 use index (i1,i2,i3) using(id1,id2)";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    Assert.assertEquals("(tb1 FORCE INDEX FOR JOIN (i1, i2), tb3) " + "LEFT JOIN tb2 AS T2 USE INDEX (i1, i2, i3) USING (id1, id2)", output);
    sql = "(tb1 force index for join (i1,i2),tb3) left outer join (tb2 as t2 use index (i1,i2,i3)) using(id1,id2)";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    Assert.assertEquals("(tb1 FORCE INDEX FOR JOIN (i1, i2), tb3) " + "LEFT JOIN (tb2 AS T2 USE INDEX (i1, i2, i3)) USING (id1, id2)", output);
    sql = "tb1 as t1 cross join tb2 as t2 use index(i1)using(id1)";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    Assert.assertEquals("tb1 AS T1 INNER JOIN tb2 AS T2 USE INDEX (i1) USING (id1)", output);
    sql = "(tb1 as t1) cross join tb2 as t2 use index(i1)using(id1)";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    Assert.assertEquals("(tb1 AS T1) INNER JOIN tb2 AS T2 USE INDEX (i1) USING (id1)", output);
    sql = "tb1 as _latin't1' cross join tb2 as t2 use index(i1)";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    Assert.assertEquals("tb1 AS _LATIN't1' INNER JOIN tb2 AS T2 USE INDEX (i1)", output);
    sql = "((select '  @  from' from `from`)) as t1 cross join tb2 as t2 use index()";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    list = trs.getTableReferenceList();
    Assert.assertEquals(1, list.size());
    Assert.assertEquals(InnerJoin.class, list.get(0).getClass());
    SubqueryFactor lsf = (SubqueryFactor) ((InnerJoin) list.get(0)).getLeftTableRef();
    Assert.assertEquals("T1", lsf.getAlias());
    Assert.assertEquals(DMLSelectStatement.class, lsf.getSubquery().getClass());
    rtf = (TableRefFactor) ((InnerJoin) list.get(0)).getRightTableRef();
    Assert.assertEquals("T2", rtf.getAlias());
    hintlist = rtf.getHintList();
    Assert.assertEquals(1, hintlist.size());
    indexhint = hintlist.get(0);
    Assert.assertEquals("USE", indexhint.getAction().name());
    Assert.assertEquals("INDEX", indexhint.getType().name());
    Assert.assertEquals("ALL", indexhint.getScope().name());
    Assert.assertEquals("tb2", rtf.getTable().getIdText());
    Assert.assertEquals("(SELECT '  @  from' FROM `from`) AS T1 " + "INNER JOIN tb2 AS T2 USE INDEX ()", output);
    sql = "(tb1 as t1) straight_join (tb2 as t2)";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    Assert.assertEquals("(tb1 AS T1) STRAIGHT_JOIN (tb2 AS T2)", output);
    sql = "tb1 straight_join tb2 as t2 on tb1.id=tb2.id";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    Assert.assertEquals("tb1 STRAIGHT_JOIN tb2 AS T2 ON tb1.id = tb2.id", output);
    sql = "tb1 left outer join tb2 on tb1.id=tb2.id";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    Assert.assertEquals("tb1 LEFT JOIN tb2 ON tb1.id = tb2.id", output);
    sql = "tb1 left outer join tb2 using(id)";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    Assert.assertEquals("tb1 LEFT JOIN tb2 USING (id)", output);
    sql = "(tb1 right outer join tb2 using()) join tb3 on tb1.id=tb2.id and tb2.id=tb3.id";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    list = trs.getTableReferenceList();
    Assert.assertEquals(1, list.size());
    Assert.assertEquals(InnerJoin.class, list.get(0).getClass());
    ltr = (TableReferences) ((InnerJoin) list.get(0)).getLeftTableRef();
    Assert.assertEquals(1, ltr.getTableReferenceList().size());
    TableRefFactor lltrf = (TableRefFactor) ((OuterJoin) ltr.getTableReferenceList().get(0)).getLeftTableRef();
    Assert.assertEquals(null, lltrf.getAlias());
    Assert.assertEquals("tb1", lltrf.getTable().getIdText());
    using_list = ((OuterJoin) ltr.getTableReferenceList().get(0)).getUsing();
    Assert.assertEquals(0, using_list.size());
    rtf = (TableRefFactor) ((InnerJoin) list.get(0)).getRightTableRef();
    Assert.assertEquals(null, rtf.getAlias());
    hintlist = rtf.getHintList();
    Assert.assertEquals(0, hintlist.size());
    Assert.assertEquals("tb3", rtf.getTable().getIdText());
    Assert.assertEquals(LogicalAndExpression.class, ((InnerJoin) list.get(0)).getOnCond().getClass());
    Assert.assertEquals("(tb1 RIGHT JOIN tb2 USING ()) " + "INNER JOIN tb3 ON tb1.id = tb2.id AND tb2.id = tb3.id", output);
    sql = "tb1 right outer join tb2 using(id1,id2) " + "join (tb3,tb4) on tb1.id=tb2.id and tb2.id=tb3.id";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    list = trs.getTableReferenceList();
    Assert.assertEquals(1, list.size());
    Assert.assertEquals(InnerJoin.class, list.get(0).getClass());
    OuterJoin loj = (OuterJoin) ((InnerJoin) list.get(0)).getLeftTableRef();
    lltrf = (TableRefFactor) loj.getLeftTableRef();
    Assert.assertEquals(null, lltrf.getAlias());
    Assert.assertEquals("tb1", lltrf.getTable().getIdText());
    using_list = loj.getUsing();
    Assert.assertEquals(2, using_list.size());
    rtr = (TableReferences) ((InnerJoin) list.get(0)).getRightTableRef();
    Assert.assertEquals(2, rtr.getTableReferenceList().size());
    Assert.assertEquals("tb3", ((TableRefFactor) (rtr.getTableReferenceList().get(0))).getTable().getIdText());
    Assert.assertEquals("tb4", ((TableRefFactor) (rtr.getTableReferenceList().get(1))).getTable().getIdText());
    Assert.assertEquals(LogicalAndExpression.class, ((InnerJoin) list.get(0)).getOnCond().getClass());
    Assert.assertEquals("tb1 RIGHT JOIN tb2 USING (id1, id2) " + "INNER JOIN (tb3, tb4) ON tb1.id = tb2.id AND tb2.id = tb3.id", output);
    sql = "tb1 left outer join tb2 join tb3 using(id)";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    Assert.assertEquals("tb1 LEFT JOIN (tb2 INNER JOIN tb3) USING (id)", output);
    sql = "tb1 right join tb2 on tb1.id=tb2.id";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    Assert.assertEquals("tb1 RIGHT JOIN tb2 ON tb1.id = tb2.id", output);
    sql = "tb1 natural right join tb2 ";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    Assert.assertEquals("tb1 NATURAL RIGHT JOIN tb2", output);
    sql = "tb1 natural right outer join tb2 natural left outer join tb3";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    list = trs.getTableReferenceList();
    Assert.assertEquals(1, list.size());
    Assert.assertEquals(NaturalJoin.class, list.get(0).getClass());
    NaturalJoin lnj = (NaturalJoin) ((NaturalJoin) list.get(0)).getLeftTableRef();
    lltrf = (TableRefFactor) lnj.getLeftTableRef();
    Assert.assertEquals(null, lltrf.getAlias());
    Assert.assertEquals("tb1", lltrf.getTable().getIdText());
    TableRefFactor rltrf = (TableRefFactor) lnj.getRightTableRef();
    Assert.assertEquals(null, rltrf.getAlias());
    Assert.assertEquals("tb2", rltrf.getTable().getIdText());
    rtf = (TableRefFactor) ((NaturalJoin) list.get(0)).getRightTableRef();
    Assert.assertEquals(null, rtf.getAlias());
    Assert.assertEquals("tb3", rtf.getTable().getIdText());
    Assert.assertEquals("tb1 NATURAL RIGHT JOIN tb2 NATURAL LEFT JOIN tb3", output);
    sql = "tb1 natural left outer join tb2 ";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    Assert.assertEquals("tb1 NATURAL LEFT JOIN tb2", output);
    sql = "(tb1  t1) natural  join (tb2 as t2) ";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    Assert.assertEquals("(tb1 AS T1) NATURAL JOIN (tb2 AS T2)", output);
    sql = "(select (select * from tb1) from `select` " + "where `any`=any(select id2 from tb2))any  ";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    list = trs.getTableReferenceList();
    Assert.assertEquals(SubqueryFactor.class, list.get(0).getClass());
    Assert.assertEquals("ANY", ((SubqueryFactor) list.get(0)).getAlias());
    Assert.assertEquals("(SELECT SELECT * FROM tb1 FROM `select` " + "WHERE `any` = ANY (SELECT id2 FROM tb2)) AS ANY", output);
    sql = "((tb1),(tb3 as t3,`select`),tb2 use key for join (i1,i2))" + " left join tb4 join tb5 using ()";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    list = trs.getTableReferenceList();
    Assert.assertEquals(1, list.size());
    Assert.assertEquals(OuterJoin.class, list.get(0).getClass());
    Assert.assertEquals(TableReferences.class, ((OuterJoin) list.get(0)).getLeftTableRef().getClass());
    Assert.assertEquals(InnerJoin.class, ((OuterJoin) list.get(0)).getRightTableRef().getClass());
    list = ((TableReferences) ((OuterJoin) list.get(0)).getLeftTableRef()).getTableReferenceList();
    list = ((TableReferences) list.get(1)).getTableReferenceList();
    Assert.assertEquals(2, list.size());
    Assert.assertEquals("(tb1, tb3 AS T3, `select`, tb2 USE KEY FOR JOIN (i1, i2))" + " LEFT JOIN (tb4 INNER JOIN tb5) USING ()", output);
    sql = "((select `select` from `from` ) tb1),(tb3 as t3,`select`),tb2 use key for join (i1,i2) " + "left join tb4 using (i1,i2)straight_join tb5";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    list = trs.getTableReferenceList();
    Assert.assertEquals(3, list.size());
    Assert.assertEquals(TableReferences.class, list.get(0).getClass());
    Assert.assertEquals(TableReferences.class, list.get(1).getClass());
    Assert.assertEquals(StraightJoin.class, list.get(2).getClass());
    list = ((TableReferences) list.get(0)).getTableReferenceList();
    Assert.assertEquals(SubqueryFactor.class, list.get(0).getClass());
    list = trs.getTableReferenceList();
    list = ((TableReferences) list.get(1)).getTableReferenceList();
    Assert.assertEquals(TableRefFactor.class, list.get(0).getClass());
    Assert.assertEquals(TableRefFactor.class, list.get(1).getClass());
    list = trs.getTableReferenceList();
    StraightJoin sj = (StraightJoin) list.get(2);
    Assert.assertEquals(OuterJoin.class, sj.getLeftTableRef().getClass());
    Assert.assertEquals(TableRefFactor.class, sj.getRightTableRef().getClass());
    OuterJoin oj = (OuterJoin) sj.getLeftTableRef();
    using_list = oj.getUsing();
    Assert.assertEquals(2, using_list.size());
    Assert.assertEquals("(SELECT `select` FROM `from`) AS TB1, tb3 AS T3, `select`, tb2 USE KEY FOR JOIN (i1, i2) LEFT JOIN tb4 USING (i1, i2) STRAIGHT_JOIN tb5", output);
    sql = "(`select`,(tb1 as t1 use index for join()ignore key for group by (i1)))" + "join tb2 on cd1=any " + "right join " + "tb3 straight_join " + "(tb4 use index() left outer join (tb6,tb7) on id3=all(select `all` from `all`)) " + " on id2=any(select * from any) using  (i1)";
    lexer = new MySQLLexer(sql);
    parser = getDMLParser(lexer);
    trs = parser.tableRefs();
    output = output2MySQL(trs, sql);
    list = trs.getTableReferenceList();
    Assert.assertEquals(1, list.size());
    Assert.assertEquals(OuterJoin.class, list.get(0).getClass());
    using_list = ((OuterJoin) list.get(0)).getUsing();
    Assert.assertEquals(1, using_list.size());
    Assert.assertEquals(InnerJoin.class, ((OuterJoin) (list.get(0))).getLeftTableRef().getClass());
    Assert.assertEquals(StraightJoin.class, ((OuterJoin) (list.get(0))).getRightTableRef().getClass());
    StraightJoin rsj = (StraightJoin) ((OuterJoin) (list.get(0))).getRightTableRef();
    Assert.assertEquals(TableRefFactor.class, rsj.getLeftTableRef().getClass());
    Assert.assertEquals(TableReferences.class, rsj.getRightTableRef().getClass());
    list = ((TableReferences) rsj.getRightTableRef()).getTableReferenceList();
    Assert.assertEquals(OuterJoin.class, list.get(0).getClass());
    Assert.assertEquals("(`select`, tb1 AS T1 USE INDEX FOR JOIN () IGNORE KEY FOR GROUP BY (i1)) " + "INNER JOIN tb2 ON cd1 = any RIGHT JOIN (tb3 STRAIGHT_JOIN (tb4 USE INDEX () " + "LEFT JOIN (tb6, tb7) ON id3 = ALL (SELECT `all` FROM `all`)) ON id2 = ANY (SELECT * FROM any))" + " USING (i1)", output);
}

Example 2 with StraightJoin

use of com.alibaba.cobar.parser.ast.fragment.tableref.StraightJoin in project cobar by alibaba.

the class MySQLDMLParser method buildTableReference.

@SuppressWarnings("unchecked")
private TableReference buildTableReference(TableReference ref) throws SQLSyntaxErrorException {
    for (; ; ) {
        Expression on;
        List<String> using;
        TableReference temp;
        boolean isOut = false;
        boolean isLeft = true;
        switch(lexer.token()) {
            case KW_INNER:
            case KW_CROSS:
                lexer.nextToken();
            case KW_JOIN:
                lexer.nextToken();
                temp = tableFactor();
                switch(lexer.token()) {
                    case KW_ON:
                        lexer.nextToken();
                        on = exprParser.expression();
                        ref = new InnerJoin(ref, temp, on);
                        break;
                    case KW_USING:
                        lexer.nextToken();
                        match(PUNC_LEFT_PAREN);
                        using = idNameList();
                        ref = new InnerJoin(ref, temp, using);
                        break;
                    default:
                        ref = new InnerJoin(ref, temp);
                        break;
                }
                break;
            case KW_STRAIGHT_JOIN:
                lexer.nextToken();
                temp = tableFactor();
                switch(lexer.token()) {
                    case KW_ON:
                        lexer.nextToken();
                        on = exprParser.expression();
                        ref = new StraightJoin(ref, temp, on);
                        break;
                    default:
                        ref = new StraightJoin(ref, temp);
                        break;
                }
                break;
            case KW_RIGHT:
                isLeft = false;
            case KW_LEFT:
                lexer.nextToken();
                if (lexer.token() == KW_OUTER) {
                    lexer.nextToken();
                }
                match(KW_JOIN);
                temp = tableReference();
                switch(lexer.token()) {
                    case KW_ON:
                        lexer.nextToken();
                        on = exprParser.expression();
                        ref = new OuterJoin(isLeft, ref, temp, on);
                        break;
                    case KW_USING:
                        lexer.nextToken();
                        match(PUNC_LEFT_PAREN);
                        using = idNameList();
                        ref = new OuterJoin(isLeft, ref, temp, using);
                        break;
                    default:
                        Object condition = temp.removeLastConditionElement();
                        if (condition instanceof Expression) {
                            ref = new OuterJoin(isLeft, ref, temp, (Expression) condition);
                        } else if (condition instanceof List) {
                            ref = new OuterJoin(isLeft, ref, temp, (List<String>) condition);
                        } else {
                            throw err("conditionExpr cannot be null for outer join");
                        }
                        break;
                }
                break;
            case KW_NATURAL:
                lexer.nextToken();
                switch(lexer.token()) {
                    case KW_RIGHT:
                        isLeft = false;
                    case KW_LEFT:
                        lexer.nextToken();
                        if (lexer.token() == KW_OUTER) {
                            lexer.nextToken();
                        }
                        isOut = true;
                    case KW_JOIN:
                        lexer.nextToken();
                        temp = tableFactor();
                        ref = new NaturalJoin(isOut, isLeft, ref, temp);
                        break;
                    default:
                        throw err("unexpected token after NATURAL for natural join:" + lexer.token());
                }
                break;
            default:
                return ref;
        }
    }
}