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https://issues.apache.org/jira/browse/HIVE-11684?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14999393#comment-14999393
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Laljo John Pullokkaran commented on HIVE-11684:
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[~jcamachorodriguez] Could you update RB?
1. It seems like HiveProjectSortTransposeRule is not checking if sort col is
visible above project.
2. HiveSortJoinReduceRule: shouldn't it check if sort cols are coming from
outer side
3. HiveSortMergeRule:
a) Check to see if input is reduced seems
unnecessary; seems like we should always merge them
b) Merge needs to be more sophisticated: what limit
will you use (i would think min of both), what collation to use (both, in the
order).
> Implement limit pushdown through outer join in CBO
> --------------------------------------------------
>
> Key: HIVE-11684
> URL: https://issues.apache.org/jira/browse/HIVE-11684
> Project: Hive
> Issue Type: New Feature
> Components: CBO
> Affects Versions: 2.0.0
> Reporter: Jesus Camacho Rodriguez
> Assignee: Jesus Camacho Rodriguez
> Attachments: HIVE-11684.01.patch, HIVE-11684.02.patch,
> HIVE-11684.03.patch, HIVE-11684.04.patch, HIVE-11684.05.patch,
> HIVE-11684.07.patch, HIVE-11684.08.patch, HIVE-11684.09.patch,
> HIVE-11684.10.patch, HIVE-11684.11.patch, HIVE-11684.12.patch,
> HIVE-11684.12.patch, HIVE-11684.14.patch, HIVE-11684.15.patch,
> HIVE-11684.16.patch, HIVE-11684.patch
>
>
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