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https://issues.apache.org/jira/browse/SPARK-10606?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14791499#comment-14791499
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Cheng Hao commented on SPARK-10606:
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[~rhbutani] Which version are you using, actually I've fixed the bug at
SPARK-8972, it should be included in 1.5. Can you try that with 1.5?
> Cube/Rollup/GrpSet doesn't create the correct plan when group by is on
> something other than an AttributeReference
> -----------------------------------------------------------------------------------------------------------------
>
> Key: SPARK-10606
> URL: https://issues.apache.org/jira/browse/SPARK-10606
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Reporter: Harish Butani
> Priority: Critical
>
> Consider the following table: t(a : String, b : String) and the query
> {code}
> select a, concat(b, '1'), count(*)
> from t
> group by a, concat(b, '1') with cube
> {code}
> The projections in the Expand operator are not setup correctly. The expand
> logic in Analyzer:expand is comparing grouping expressions against
> child.output. So {{concat(b, '1')}} is never mapped to a null Literal.
> A simple fix is to add a Rule to introduce a Projection below the
> Cube/Rollup/GrpSet operator that additionally projects the
> groupingExpressions that are missing in the child.
> Marking this as Critical, because you get wrong results.
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