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Posted to dev@hive.apache.org by "Eric Hanson (JIRA)" <ji...@apache.org> on 2013/05/17 22:37:16 UTC
[jira] [Commented] (HIVE-4575) In place filtering in Not Filter
doesn't handle nulls correctly.
[ https://issues.apache.org/jira/browse/HIVE-4575?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13661029#comment-13661029 ]
Eric Hanson commented on HIVE-4575:
-----------------------------------
I'm not sure I understand the problem here. Can you give a repro?
> In place filtering in Not Filter doesn't handle nulls correctly.
> ----------------------------------------------------------------
>
> Key: HIVE-4575
> URL: https://issues.apache.org/jira/browse/HIVE-4575
> Project: Hive
> Issue Type: Sub-task
> Reporter: Jitendra Nath Pandey
> Assignee: Jitendra Nath Pandey
>
> The FilterNotExpr evaluates the child expression and takes the compliment of the selected vector. Since child expression filters out null values, the compliment includes the nulls in the output. This is incorrect because not(null) = null.
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