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Posted to issues@drill.apache.org by "Victoria Markman (JIRA)" <ji...@apache.org> on 2015/01/26 18:54:35 UTC
[jira] [Created] (DRILL-2069) Star is not expanded correctly in the
query with IN clause containing subquery
Victoria Markman created DRILL-2069:
---------------------------------------
Summary: Star is not expanded correctly in the query with IN clause containing subquery
Key: DRILL-2069
URL: https://issues.apache.org/jira/browse/DRILL-2069
Project: Apache Drill
Issue Type: Bug
Components: Query Planning & Optimization
Affects Versions: 0.8.0
Reporter: Victoria Markman
Assignee: Jinfeng Ni
t1.json
{code}
{ "a1": "aa", "b1": 1 }
{ "a1": "bb", "b1": 2 }
{ "a1": "cc", "b1": 3 }
{code}
t2.json
{code}
{ "a2": "aa", "b2": 1 }
{ "a2": "bb", "b2": 2 }
{ "a2": "xx", "b2": 10 }
{code}
Star is expanded incorrectly, we should get only columns from `t1.json`
{code}
0: jdbc:drill:schema=dfs> select * from `t1.json` where a1 in (select a2 from `t2.json`);
+------------+------------+------------+------------+
| a2 | a1 | b1 | a10 |
+------------+------------+------------+------------+
| aa | aa | 1 | aa |
| bb | bb | 2 | bb |
+------------+------------+------------+------------+
2 rows selected (0.172 seconds)
{code}
explain plan
{code}
00-01 Project(*=[$0])
00-02 Project(*=[$0])
00-03 HashJoin(condition=[=($1, $2)], joinType=[inner])
00-05 Project(*=[$0], a1=[$1])
00-07 Scan(groupscan=[EasyGroupScan [selectionRoot=/test/t1.json, numFiles=1, columns=[`*`], files=[maprfs:/test/t1.json]]])
00-04 HashAgg(group=[{0}])
00-06 Scan(groupscan=[EasyGroupScan [selectionRoot=/test/t2.json, numFiles=1, columns=[`a2`], files=[maprfs:/test/t2.json]]])
{code}
Workaround - specify columns explicitly
{code}
0: jdbc:drill:schema=dfs> select t1.a1, t1.a1 from `t1.json` t1 where t1.a1 in (select t2.a2 from `t2.json` t2);
+------------+------------+
| a1 | a10 |
+------------+------------+
| aa | aa |
| bb | bb |
+------------+------------+
2 rows selected (0.24 seconds)
{code}
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