[jira] [Created] (HIVE-16527) Support outer and mixed reference aggregates in windowed functions

["Remus Rusanu (JIRA)" <ji...@apache.org>]

Remus Rusanu created HIVE-16527:
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             Summary: 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


{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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