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https://issues.apache.org/jira/browse/HIVE-8284?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14209379#comment-14209379
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JongWon Park commented on HIVE-8284:
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Thanks, Ashutosh!
> Equality comparison is done between two floating point variables in
> HiveRelMdUniqueKeys#getUniqueKeys()
> -------------------------------------------------------------------------------------------------------
>
> Key: HIVE-8284
> URL: https://issues.apache.org/jira/browse/HIVE-8284
> Project: Hive
> Issue Type: Bug
> Components: CBO
> Affects Versions: 0.14.0
> Reporter: Ted Yu
> Assignee: JongWon Park
> Priority: Minor
> Fix For: 0.15.0
>
> Attachments: HIVE-8284.patch
>
>
> {code}
> double numRows = tScan.getRows();
> ...
> double r = cStat.getRange().maxValue.doubleValue() -
> cStat.getRange().minValue.doubleValue() + 1;
> isKey = (numRows == r);
> {code}
> The equality check should use a small epsilon as tolerance.
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