[jira] [Commented] (HIVE-16427) Fix multi-insert query and write qtests

[Yongzhi Chen (JIRA)]

    [ 
https://issues.apache.org/jira/browse/HIVE-16427?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15971740#comment-15971740
 ] 

Yongzhi Chen commented on HIVE-16427:
-------------------------------------

Thanks [~ashutoshc], I just attached patch2 to handle both cases:

{noformat}
TS-OP1-OP2-OP3-LIM0
                 |
              OP4
{noformat}

{noformat}
TS-OP1-OP2-OP3-LIM0
  |_______|
             OP4
{noformat}

The basic idea of the patch is: if all the streams from TS go into 
lim0/filterfalse, then the TS can be optimized with MetadataOnly


> Fix multi-insert query and write qtests
> ---------------------------------------
>
>                 Key: HIVE-16427
>                 URL: https://issues.apache.org/jira/browse/HIVE-16427
>             Project: Hive
>          Issue Type: Bug
>          Components: Logical Optimizer
>            Reporter: Thomas Poepping
>            Assignee: Yongzhi Chen
>         Attachments: HIVE-16427.1.patch, HIVE-16427.2.patch
>
>
> On HIVE-16415, it was found that the bug reported to be fixed in HIVE-14519 
> was not actually fixed.
> This task is to find the problem, fix it, and add qtests to verify no future 
> regression.
> Specifically, the following query does not produce correct answers: 
> {code}
> From (select * from src) a
> insert overwrite directory '/tmp/emp/dir1/'
> select key, value
> insert overwrite directory '/tmp/emp/dir2/'
> select 'header'
> limit 0
> insert overwrite directory '/tmp/emp/dir3/'
> select key, value 
> where key = 100;
> {code}
> This gives incorrect result in master. All dirs end up with 0 rows instead of 
> just dir2.



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