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https://issues.apache.org/jira/browse/HIVE-8656?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14192746#comment-14192746
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Julian Hyde commented on HIVE-8656:
-----------------------------------
I suspect that CALCITE-448 is (despite its title) a subtle issue in
PushFiltersThroughJoinRule. If we patch TypeConverter.java to make all columns
nullable (what we intended anyway) the issue goes away. See attached.
> CBO: auto_join_filters fails
> ----------------------------
>
> Key: HIVE-8656
> URL: https://issues.apache.org/jira/browse/HIVE-8656
> Project: Hive
> Issue Type: Sub-task
> Components: CBO
> Reporter: Sergey Shelukhin
> Assignee: Ashutosh Chauhan
> Priority: Critical
> Fix For: 0.14.0
>
>
> Haven't looked why yet
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