How is dir0 inferred from the directory path

[rahul challapalli]

Drillers,

The below result suggests that 'dir0' is inferred treating
'/drill/testdata/audits' as the root in the below query. Is this by design
that the first '*' gets treated as dir0?

select * from dfs.`/drill/testdata/audits/*/audit/*.json` limit 1;
+--------+--------+----------------------------------------+---------------+------+--------------------+----------------------+------------------------+-----------------+
|  dir0     |  dir1  |        timestamp                | operation  | uid
 |   ipAddress   | columnFamily  | columnQualifier  |    tableFid    |
+----------+--------+--------------------------------------+---------------+------+--------------------+----------------------+------------------------+-----------------+
| node1  | audit  | 2015-06-06 10:41:19.248  | op1          | 0    |
10.10.105.51  | CF1                | clq1                  | 123
  |
+--------+--------+----------------------------------------+---------------+------+--------------------+----------------------+------------------------+-----------------+

- Rahul