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From "Lefty Leverenz (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-16527) Support outer and mixed reference aggregates in windowed functions
Date Mon, 01 May 2017 07:50:04 GMT

    [ https://issues.apache.org/jira/browse/HIVE-16527?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15990659#comment-15990659
] 

Lefty Leverenz commented on HIVE-16527:
---------------------------------------

Okay, I'm adding a TODOC3.0 label.

> Support outer and mixed reference aggregates in windowed functions
> ------------------------------------------------------------------
>
>                 Key: HIVE-16527
>                 URL: https://issues.apache.org/jira/browse/HIVE-16527
>             Project: Hive
>          Issue Type: Improvement
>          Components: Query Processor
>            Reporter: Remus Rusanu
>            Assignee: Remus Rusanu
>             Fix For: 3.0.0
>
>         Attachments: HIVE-16527.00.patch, HIVE-16527.02.patch, HIVE-16527.03.patch
>
>
> {noformat}
> select sum(sum(c1)) over() from e011_01;
> select sum(sum(c1)) over(partition by c2 order by c1) from e011_01 group by e011_01.c1,
e011_01.c2;
> select sum(sum(e011_01.c1)) over(partition by e011_01.c2 order by e011_01.c1) from e011_01
join e011_03 on e011_01.c1 = e011_03.c1 group by e011_01.c1, e011_01.c2;
> select sum(sum(e011_01.c1)) over(partition by e011_03.c2 order by e011_03.c1) from e011_01
join e011_03 on e011_01.c1 = e011_03.c1 group by e011_03.c1, e011_03.c2;
> select sum(corr(e011_01.c1, e011_03.c1)) over(partition by e011_01.c2 order by e011_03.c2)
from e011_01 join e011_03 on e011_01.c1 = e011_03.c1 group by e011_03.c2, e011_01.c2;
> {noformat}
> We fail to generate a plan for any of the above. The issue is that in {{SemanticAnalyzer.doPhase1GetAllAggregations}},
for {{TOK_WINDOWSPEC}} we ignore all children except the last (the window spec child). Additionally
the typecheck processor is not prepared to encounter UDAF expressions ({{TypeCheckProcFactory.DefaultExpreProcessor.validateUDF}},
{{getXpathOrFuncExprNodeDesc}}). 



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