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From "Ashutosh Chauhan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-6395) multi-table insert from select transform fails if optimize.ppd enabled
Date Fri, 21 Mar 2014 22:14:48 GMT

    [ https://issues.apache.org/jira/browse/HIVE-6395?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13943646#comment-13943646
] 

Ashutosh Chauhan commented on HIVE-6395:
----------------------------------------

I think HIVE-4293 indeed fixes this and is more complete. [~rhbutani] / [~navis] Can you verify
?

> multi-table insert from select transform fails if optimize.ppd enabled
> ----------------------------------------------------------------------
>
>                 Key: HIVE-6395
>                 URL: https://issues.apache.org/jira/browse/HIVE-6395
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Processor
>    Affects Versions: 0.13.0
>            Reporter: Szehon Ho
>            Assignee: Szehon Ho
>         Attachments: HIVE-6395.patch, test.py
>
>
> {noformat}
> set hive.optimize.ppd=true;
> add file ./test.py;
> from (select transform(test.*) using 'python ./test.py'
> as id,name,state from test) t0
> insert overwrite table test2 select * where state=1
> insert overwrite table test3 select * where state=2;
> {noformat}
> In the above example, the select transform returns an extra column, and that column is
used in where clause of the multi-insert selects.  However, if optimize is on, the query plan
is wrong:
> filter (state=1 and state=2) //impossible
> --> select, insert into test1
> --> select, insert into test2
> The correct query plan for hive.optimize.ppd=false is:
> filter (state=1)
> --> select, insert into test1
> filter (state=2)
> --> select, insert into test2
> For reference
> {noformat}
> create table test (id int, name string)
> create table test2(id int, name string, state int)
> create table test3(id int, name string, state int)
> {noformat}



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