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https://issues.apache.org/jira/browse/HIVE-3403?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13492282#comment-13492282
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Namit Jain commented on HIVE-3403:
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[~mgrover], typically we have erred on the side on having more configurable
parameters in hive, rather than over-loading a parameter.
There is no correct answer for this, but I would prefer to have an additional
conf. Moreover, hive.optimize.bucketmapjoin, only converts map-joins to
bucketized map joins, whenever possible. However, here, the user is not giving
any hints, and we are converting the query to use sort-merge joins.
> user should not specify mapjoin to perform sort-merge bucketed join
> -------------------------------------------------------------------
>
> Key: HIVE-3403
> URL: https://issues.apache.org/jira/browse/HIVE-3403
> Project: Hive
> Issue Type: Bug
> Reporter: Namit Jain
> Assignee: Namit Jain
> Attachments: hive.3403.1.patch, hive.3403.2.patch, hive.3403.3.patch,
> hive.3403.4.patch
>
>
> Currently, in order to perform a sort merge bucketed join, the user needs
> to set hive.optimize.bucketmapjoin.sortedmerge to true, and also specify the
> mapjoin hint.
> The user should not specify any hints.
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