hive-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Aihua Xu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-13235) Insert from select generates incorrect result when hive.optimize.constant.propagation is on
Date Mon, 14 Mar 2016 21:51:33 GMT

     [ https://issues.apache.org/jira/browse/HIVE-13235?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Aihua Xu updated HIVE-13235:
----------------------------
    Status: Patch Available  (was: Open)

Attached patch-2: for the cases when the column has both name and alias, we will use NamedColumnInfo
which will match against column name during comparison rather than alias since alias is not
visible yet for such cases.

> Insert from select generates incorrect result when hive.optimize.constant.propagation
is on
> -------------------------------------------------------------------------------------------
>
>                 Key: HIVE-13235
>                 URL: https://issues.apache.org/jira/browse/HIVE-13235
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Planning
>    Affects Versions: 2.0.0
>            Reporter: Aihua Xu
>            Assignee: Aihua Xu
>         Attachments: HIVE-13235.1.patch, HIVE-13235.2.patch
>
>
> The following query returns incorrect result when constant optimization is turned on.
The subquery happens to have an alias p1 to be the same as the input partition name. Constant
optimizer will optimize it incorrectly as the constant.
> When constant optimizer is turned off, we will get the correct result.
> {noformat}
> set hive.cbo.enable=false;
> set hive.optimize.constant.propagation = true;
> create table t1(c1 string, c2 double) partitioned by (p1 string, p2 string);
> create table t2(p1 double, c2 string);
> insert into table t1 partition(p1='40', p2='p2') values('c1', 0.0);
> INSERT OVERWRITE TABLE t2  select if((c2 = 0.0), c2, '0') as p1, 2 as p2 from t1 where
c1 = 'c1' and p1 = '40';
> select * from t2;
> 40   2
> {noformat}



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message