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From "Zelaine Fong (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (DRILL-5375) Nested loop join: return correct result for left join
Date Thu, 23 Mar 2017 15:43:41 GMT

     [ https://issues.apache.org/jira/browse/DRILL-5375?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Zelaine Fong updated DRILL-5375:
--------------------------------
    Reviewer: Aman Sinha

Assigned Reviewer to [~amansinha100]

> 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
>              Labels: doc-impacting
>
> 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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