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From "Jinfeng Ni (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-1187) Select * from join does not return required columns
Date Thu, 24 Jul 2014 18:00:44 GMT
Jinfeng Ni created DRILL-1187:
---------------------------------

             Summary: Select * from join does not return required columns
                 Key: DRILL-1187
                 URL: https://issues.apache.org/jira/browse/DRILL-1187
             Project: Apache Drill
          Issue Type: Bug
            Reporter: Jinfeng Ni


1.  Select * from join does not return required columns   

 select * from cp.`tpch/nation.parquet` n, cp.`tpch/region.parquet` r where n.n_regionkey
= r.r_regionkey limit 2;

+------------+-------------+-------------+------------+-------------+------------+
|     *0     | r_regionkey | N_NATIONKEY |   N_NAME   | N_REGIONKEY | N_COMMENT  |
+------------+-------------+-------------+------------+-------------+------------+
| null       | 0           | 0           | [B@6c7e90b9 | 0           | [B@694f9954 |
| null       | 1           | 1           | [B@68db8fcf | 1           | [B@26be94d1 |
+------------+-------------+-------------+------------+-------------+——————+

In this case, RHS only has the join key column appear in the result. Also, it has *0 column
in the output.

2.  Select T1.* from join returns unwanted columns


select n.* from cp.`tpch/nation.parquet` n, cp.`tpch/region.parquet` r where n.n_regionkey
= r.r_regionkey limit 2;

+-------------+-------------+------------+-------------+------------+
| R_REGIONKEY | N_NATIONKEY |   N_NAME   | N_REGIONKEY | N_COMMENT  |
+-------------+-------------+------------+-------------+------------+
| 0           | 0           | [B@3328c286 | 0           | [B@38fb05a7 |
| 1           | 1           | [B@6830342a | 1           | [B@34b0e6d6 |
+-------------+-------------+------------+-------------+——————+

select r.* from cp.`tpch/nation.parquet` n, cp.`tpch/region.parquet` r where n.n_regionkey
= r.r_regionkey limit 2;

+-------------+------------+------------+-------------+
| R_REGIONKEY |   R_NAME   | R_COMMENT  | N_REGIONKEY |
+-------------+------------+------------+-------------+
| 0           | [B@997b44c | [B@46bdee7f | 0           |
| 1           | [B@5f74f821 | [B@784e6f7c | 1           |
+-------------+------------+------------+——————+
 
In this case, the join key column from the other table appears in the output, which is not
correct. 






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