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https://issues.apache.org/jira/browse/HIVE-10416?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14509322#comment-14509322
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Jesus Camacho Rodriguez commented on HIVE-10416:
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[~ashutoshc], not yet, I need to discuss with John about his comment.
> CBO (Calcite Return Path): Fix return columns if Sort operator is on top of
> plan returned by Calcite
> ----------------------------------------------------------------------------------------------------
>
> Key: HIVE-10416
> URL: https://issues.apache.org/jira/browse/HIVE-10416
> Project: Hive
> Issue Type: Sub-task
> Components: CBO
> Reporter: Jesus Camacho Rodriguez
> Assignee: Jesus Camacho Rodriguez
> Fix For: 1.2.0
>
> Attachments: HIVE-10416.01.patch, HIVE-10416.patch
>
>
> When return path is on, if the plan's top operator is a Sort, we need to
> produce a SelectOp that will output exactly the columns needed by the FS.
> The following query reproduces the problem:
> {noformat}
> select cbo_t3.c_int, c, count(*)
> from (select key as a, c_int+1 as b, sum(c_int) as c from cbo_t1
> where (cbo_t1.c_int + 1 >= 0) and (cbo_t1.c_int > 0 or cbo_t1.c_float >= 0)
> group by c_float, cbo_t1.c_int, key order by a) cbo_t1
> join (select key as p, c_int+1 as q, sum(c_int) as r from cbo_t2
> where (cbo_t2.c_int + 1 >= 0) and (cbo_t2.c_int > 0 or cbo_t2.c_float >= 0)
> group by c_float, cbo_t2.c_int, key order by q/10 desc, r asc) cbo_t2 on
> cbo_t1.a=p
> join cbo_t3 on cbo_t1.a=key
> where (b + cbo_t2.q >= 0) and (b > 0 or c_int >= 0)
> group by cbo_t3.c_int, c order by cbo_t3.c_int+c desc, c;
> {noformat}
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