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Posted to issues@hive.apache.org by "Gopal V (JIRA)" <ji...@apache.org> on 2018/08/16 19:15:00 UTC
[jira] [Commented] (HIVE-20406) Nested Coalesce giving incorrect
results
[ https://issues.apache.org/jira/browse/HIVE-20406?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16582956#comment-16582956 ]
Gopal V commented on HIVE-20406:
--------------------------------
[~ashutoshc]: this looks like a Calcite/CBO issue.
> Nested Coalesce giving incorrect results
> ----------------------------------------
>
> Key: HIVE-20406
> URL: https://issues.apache.org/jira/browse/HIVE-20406
> Project: Hive
> Issue Type: Bug
> Components: CBO
> Affects Versions: 3.0.0
> Reporter: Riju Trivedi
> Priority: Critical
>
> Below query is returning NULL instead of 'TEST'
> select coalesce(coalesce(null), 'TEST');
> {noformat}
> INFO : OK
> +-------+
> | _c0 |
> +-------+
> | NULL |
> +-------+
> {noformat}
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