[jira] [Comment Edited] (TAJO-1525) Implement INTERSECT [ALL] physical operator

["Hyunsik Choi (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TAJO-1525?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14633497#comment-14633497 ] 

Hyunsik Choi edited comment on TAJO-1525 at 7/20/15 12:17 PM:
--------------------------------------------------------------

committed the patch to master branch. Thank you for your contribution.


was (Author: hyunsik):
committed.

> Implement INTERSECT [ALL] physical operator
> -------------------------------------------
>
>                 Key: TAJO-1525
>                 URL: https://issues.apache.org/jira/browse/TAJO-1525
>             Project: Tajo
>          Issue Type: Sub-task
>            Reporter: Keuntae Park
>            Assignee: Keuntae Park
>             Fix For: 0.11.0
>
>
> As discussed in TAJO-1517,
> INTERSECT ALL needs new physical operator,
> which returns the exact number of overlapping rows between results of two query blocks.
> For example, when query1 returns 
> {code}
> 1, 3, 3, 3
> {code}
> while query2 returns 
> {code}
> 3, 3
> {code}
> query1 INTERSECT ALL query2 should return 
> {code}
> 3, 3
> {code}
> INTERSECT can be implemented by selecting distinct result of above physical operator. 



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