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https://issues.apache.org/jira/browse/HIVE-26655?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17622974#comment-17622974
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Alessandro Solimando commented on HIVE-26655:
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No statistics means no CBO, there are many queries failing for non-CBO path.
CBO has been around for long time now, with HIVE-25880 it's now possibile to
disable specific rules in case of issues so there is no need to turn off CBO
entirely in the presence of bugs.
All this considered, I guess it's time to consider removing the non-CBO path
and stop supporting it, rather than trying to fix it
> TPC-DS query 17 returns wrong results
> -------------------------------------
>
> Key: HIVE-26655
> URL: https://issues.apache.org/jira/browse/HIVE-26655
> Project: Hive
> Issue Type: Sub-task
> Reporter: Sungwoo Park
> Priority: Major
>
> When tested with 100GB ORC tables, the number of rows returned by query 17 is
> not stable. It returns fewer rows than the correct result (55 rows).
>
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