Alias scope issue

[PavelSafronov]

The following SQL works in MySQL, but dolt returns the error Not unique table/alias: TableAlias.

use db;

CREATE TABLE a (id int, name varchar(10));
CREATE TABLE b (id int, name varchar(10));

EXPLAIN
SELECT *
FROM a
WHERE (EXISTS
         (SELECT *
          FROM b TableAlias
          WHERE (TableAlias.name = 'homer'
                 AND TableAlias.id = a.id)
          LIMIT 1)
       AND EXISTS
         (SELECT *
          FROM b TableAlias
          WHERE (TableAlias.name = 'marge'
                 AND TableAlias.id = a.id)
          LIMIT 1));

MySQL output:

+----+-------------+------------+------------+------+---------------+------+---------+------+------+----------+--------------------------------------------------------------------+
| id | select_type | table      | partitions | type | possible_keys | key  | key_len | ref  | rows | filtered | Extra                                                              |
+----+-------------+------------+------------+------+---------------+------+---------+------+------+----------+--------------------------------------------------------------------+
|  1 | SIMPLE      | a          | NULL       | ALL  | NULL          | NULL | NULL    | NULL |    1 |   100.00 | NULL                                                               |
|  1 | SIMPLE      | TableAlias | NULL       | ALL  | NULL          | NULL | NULL    | NULL |    1 |   100.00 | Using where; FirstMatch(a); Using join buffer (hash join)          |
|  1 | SIMPLE      | TableAlias | NULL       | ALL  | NULL          | NULL | NULL    | NULL |    1 |   100.00 | Using where; FirstMatch(TableAlias); Using join buffer (hash join) |
+----+-------------+------------+------------+------+---------------+------+---------+------+------+----------+--------------------------------------------------------------------+

Dolt error output:

error on line 6 for query 

EXPLAIN
SELECT *
FROM a
WHERE (EXISTS
         (SELECT *
          FROM b TableAlias
          WHERE (TableAlias.name = 'homer'
                 AND TableAlias.id = a.id)
          LIMIT 1)
       AND EXISTS
         (SELECT *
          FROM b TableAlias
          WHERE (TableAlias.name = 'marge'
                 AND TableAlias.id = a.id)
          LIMIT 1)): Not unique table/alias: TableAlias
Not unique table/alias: TableAlias