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Posted to issues@drill.apache.org by "Jinfeng Ni (JIRA)" <ji...@apache.org> on 2014/07/24 20:00:44 UTC
[jira] [Created] (DRILL-1187) Select * from join does not return
required columns
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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