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Posted to dev@drill.apache.org by "Victoria Markman (JIRA)" <ji...@apache.org> on 2015/01/12 23:08:36 UTC
[jira] [Created] (DRILL-1986) Natural join query returns wrong
result
Victoria Markman created DRILL-1986:
---------------------------------------
Summary: Natural join query returns wrong result
Key: DRILL-1986
URL: https://issues.apache.org/jira/browse/DRILL-1986
Project: Apache Drill
Issue Type: Bug
Components: Query Planning & Optimization
Affects Versions: 0.8.0
Reporter: Victoria Markman
Assignee: Jinfeng Ni
Natural join returns wrong result:
{code}
0: jdbc:drill:schema=dfs> select * from `t1.json`;
+------------+------------+------------+
| a1 | b1 | c1 |
+------------+------------+------------+
| 1 | 1 | 2015-01-01 |
| 2 | 2 | 2015-01-02 |
+------------+------------+------------+
2 rows selected (0.087 seconds)
0: jdbc:drill:schema=dfs> select * from `t2.json`;
+------------+------------+------------+
| a1 | b1 | c1 |
+------------+------------+------------+
| 1 | 1 | 2015-01-01 |
+------------+------------+------------+
1 row selected (0.112 seconds)
0: jdbc:drill:schema=dfs> select * from `t1.json` natural join `t2.json`;
+------------+------------+------------+------------+------------+------------+
| a1 | b1 | c1 | a10 | b10 | c10 |
+------------+------------+------------+------------+------------+------------+
+------------+------------+------------+------------+------------+------------+
No rows selected (0.223 seconds)
{code}
Equivalent inner join query returns one row:
{code}
0: jdbc:drill:schema=dfs> select * from `t1.json` t1, `t2.json` t2 where t1.a1=t2.a1 and t1.b1=t2.b1 and t1.c1=t2.c1;
+------------+------------+------------+------------+------------+------------+
| a1 | b1 | c1 | a10 | b10 | c10 |
+------------+------------+------------+------------+------------+------------+
| 1 | 1 | 2015-01-01 | 1 | 1 | 2015-01-01 |
+------------+------------+------------+------------+------------+------------+
1 row selected (0.732 seconds)
{code}
It listed as supported in our documentation.
If we decide not to support it, we need to make sure to remove it from docs as well.
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