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From "Matt McCline (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HIVE-17682) Vectorization: IF stmt produces wrong results
Date Tue, 03 Oct 2017 21:36:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-17682?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16190252#comment-16190252
] 

Matt McCline edited comment on HIVE-17682 at 10/3/17 9:35 PM:
--------------------------------------------------------------

Thanks to [~gopalv] for coming up with a very small test case and code fix:

{noformat}
drop table if exists foo;
create temporary table foo (x int, y int) stored as orc;
insert into foo values(1,1),(2,NULL),(3,1);
select x, IF(x > 0,y,0) from foo order by x;
{noformat}



was (Author: mmccline):
Thanks to [~gopalv] for coming up with a very small test case:

{noformat}
drop table if exists foo;
create temporary table foo (x int, y int) stored as orc;
insert into foo values(1,1),(2,NULL),(3,1);
select x, IF(x > 0,y,0) from foo order by x;
{noformat}


> Vectorization: IF stmt produces wrong results
> ---------------------------------------------
>
>                 Key: HIVE-17682
>                 URL: https://issues.apache.org/jira/browse/HIVE-17682
>             Project: Hive
>          Issue Type: Bug
>          Components: Hive
>    Affects Versions: 3.0.0
>            Reporter: Matt McCline
>            Assignee: Matt McCline
>            Priority: Critical
>             Fix For: 3.0.0
>
>         Attachments: HIVE-17682.01.patch
>
>
> A query using with a vectorized IF(condition, thenExpr, elseExpr) function can produce
wrong results.



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