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Posted to issues@drill.apache.org by "Arina Ielchiieva (JIRA)" <ji...@apache.org> on 2017/03/22 16:38:41 UTC
[jira] [Created] (DRILL-5375) Nested loop join: return correct
result for left join
Arina Ielchiieva created DRILL-5375:
---------------------------------------
Summary: Nested loop join: return correct result for left join
Key: DRILL-5375
URL: https://issues.apache.org/jira/browse/DRILL-5375
Project: Apache Drill
Issue Type: Bug
Affects Versions: 1.8.0
Reporter: Arina Ielchiieva
Assignee: Arina Ielchiieva
Mini repro:
1. Create 2 Hive tables with data
{code}
CREATE TABLE t1 (
FYQ varchar(999),
dts varchar(999),
dte varchar(999)
)
ROW FORMAT DELIMITED FIELDS TERMINATED BY ',';
2016-Q1,2016-06-01,2016-09-30
2016-Q2,2016-09-01,2016-12-31
2016-Q3,2017-01-01,2017-03-31
2016-Q4,2017-04-01,2017-06-30
CREATE TABLE t2 (
who varchar(999),
event varchar(999),
dt varchar(999)
)
ROW FORMAT DELIMITED FIELDS TERMINATED BY ',';
aperson,did somthing,2017-01-06
aperson,did somthing else,2017-01-12
aperson,had chrsitmas,2016-12-26
aperson,went wild,2016-01-01
{code}
2. Impala Query shows correct result
{code}
select t2.dt, t1.fyq, t2.who, t2.event
from t2
left join t1 on t2.dt between t1.dts and t1.dte
order by t2.dt;
+------------+---------+---------+-------------------+
| dt | fyq | who | event |
+------------+---------+---------+-------------------+
| 2016-01-01 | NULL | aperson | went wild |
| 2016-12-26 | 2016-Q2 | aperson | had chrsitmas |
| 2017-01-06 | 2016-Q3 | aperson | did somthing |
| 2017-01-12 | 2016-Q3 | aperson | did somthing else |
+------------+---------+---------+-------------------+
{code}
3. Drill query shows wrong results:
{code}
alter session set planner.enable_nljoin_for_scalar_only=false;
use hive;
select t2.dt, t1.fyq, t2.who, t2.event
from t2
left join t1 on t2.dt between t1.dts and t1.dte
order by t2.dt;
+-------------+----------+----------+--------------------+
| dt | fyq | who | event |
+-------------+----------+----------+--------------------+
| 2016-12-26 | 2016-Q2 | aperson | had chrsitmas |
| 2017-01-06 | 2016-Q3 | aperson | did somthing |
| 2017-01-12 | 2016-Q3 | aperson | did somthing else |
+-------------+----------+----------+--------------------+
3 rows selected (2.523 seconds)
{code}
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