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From "Ashutosh Chauhan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-9513) NULL POINTER EXCEPTION
Date Fri, 13 Feb 2015 04:36:12 GMT

    [ https://issues.apache.org/jira/browse/HIVE-9513?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14319562#comment-14319562
] 

Ashutosh Chauhan commented on HIVE-9513:
----------------------------------------

I tried query as posted and it failed to compile on various DBs (except mysql) :
{code}
create table staging (a int, b int);
select * from (
     select * from ( select 1 as id , "foo" as str_1 from staging ) f
  union	all
     select * from ( select 2 as id , "bar" as str_2 from staging ) g
) e ;
{code}

* Postgres 9.3 : ERROR: column "foo" does not exist: select * from ( select * from ( select
1 as id , "foo" as str_1 from staging ) f union	all select * from ( select 2 as id , "bar"
as str_2 from staging ) g ) e
* Oracle 11g : ORA-00904: "foo": invalid identifier : select * from ( select * from ( select
1 as id , "foo" as str_1 from staging ) f union	all select * from ( select 2 as id , "bar"
as str_2 from staging ) g ) e
* MS-SQL 2012 : Invalid column name 'foo'.: select * from ( select * from ( select 1 as id
, "foo" as str_1 from staging ) f union	all select * from ( select 2 as id , "bar" as str_2
from staging ) g ) e
* MySQL 5.6 :  <Success with EmptyRS>.

Given above, we should check SQL standard, should allow this behavior only if standard permits.

[~ErwanMAS]  Are you migrating some workload to Hive. In that case, on which system you were
able to run this query? Else, you were simply playing with Hive.

> NULL POINTER EXCEPTION
> ----------------------
>
>                 Key: HIVE-9513
>                 URL: https://issues.apache.org/jira/browse/HIVE-9513
>             Project: Hive
>          Issue Type: Bug
>          Components: CLI
>    Affects Versions: 0.13.1
>            Reporter: ErwanMAS
>            Assignee: Navis
>         Attachments: HIVE-9513.1.patch.txt, HIVE-9513.2.patch.txt
>
>
> NPE duting parsing  of :
> {noformat}
> select * from (
>      select * from ( select 1 as id , "foo" as str_1 from staging.dual ) f
>   union	all
>      select * from ( select 2 as id , "bar" as str_2 from staging.dual ) g
> ) e ;
> {noformat}



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