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https://issues.apache.org/jira/browse/CALCITE-548?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14266017#comment-14266017
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Jesus Camacho Rodriguez commented on CALCITE-548:
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Given that {{groupSets}} does not contain duplicates, that comparison suffices
to check whether it is a CUBE or not (all possible combinations of the elements
in {{groupSet}} are in {{groupSets}} ).
> Extend induce method to return CUBE and ROLLUP
> ----------------------------------------------
>
> Key: CALCITE-548
> URL: https://issues.apache.org/jira/browse/CALCITE-548
> Project: Calcite
> Issue Type: Bug
> Reporter: Jesus Camacho Rodriguez
> Assignee: Jesus Camacho Rodriguez
> Fix For: 1.0.0-incubating
>
>
> Currently the _induce_ method in the Aggregate class only returns two classes
> of groupings: SIMPLE and OTHER. It needs to be updated to return CUBE and
> ROLLUP values too.
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