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https://issues.apache.org/jira/browse/HIVE-2378?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13404172#comment-13404172
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Kevin Wilfong commented on HIVE-2378:
-------------------------------------
As part of HIVE-2427 I want to make this controlled by a new config
hive.mapred.bigint.comparison.mode instead of hive.mapred.mode because
hive.mapred.mode is used to control too many things.
> Warn user that precision is lost when bigint is implicitly cast to double.
> --------------------------------------------------------------------------
>
> Key: HIVE-2378
> URL: https://issues.apache.org/jira/browse/HIVE-2378
> Project: Hive
> Issue Type: Improvement
> Reporter: Kevin Wilfong
> Assignee: Kevin Wilfong
> Fix For: 0.8.0
>
> Attachments: HIVE-2378.1.patch.txt, HIVE-2378.2.patch.txt,
> HIVE-2378.3.patch.txt
>
>
> When a bigint is implicitly cast to a double (when a bigint is involved in an
> equality expression with a string or double) precision may be lost, resulting
> in unexpected behavior. Until we fix the underlying issue we should throw an
> error in strict mode, and a warning in nonstrict mode alerting the user about
> this.
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