[
https://issues.apache.org/jira/browse/HIVE-9015?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14233731#comment-14233731
]
Ashutosh Chauhan commented on HIVE-9015:
----------------------------------------
Similarly,
{code}
hive> explain select (null + a) from t1;
TableScan
Select Operator
expressions: (null + a) (type: double)
{code}
expression here can also be replaced with null
> Constant Folding optimizer doesn't handle expressions involving null
> --------------------------------------------------------------------
>
> Key: HIVE-9015
> URL: https://issues.apache.org/jira/browse/HIVE-9015
> Project: Hive
> Issue Type: Task
> Reporter: Ashutosh Chauhan
>
> Expressions which are guaranteed to evaluate to {{null}} aren't folded by
> optimizer yet.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
