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https://issues.apache.org/jira/browse/ARROW-17245?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17638377#comment-17638377
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Apache Arrow JIRA Bot commented on ARROW-17245:
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This issue was last updated over 90 days ago, which may be an indication it is
no longer being actively worked. To better reflect the current state, the issue
is being unassigned per [project
policy|https://arrow.apache.org/docs/dev/developers/bug_reports.html#issue-assignment].
Please feel free to re-take assignment of the issue if it is being actively
worked, or if you plan to start that work soon.
> [C++] Substrait aggregate rel has incorrect output order
> --------------------------------------------------------
>
> Key: ARROW-17245
> URL: https://issues.apache.org/jira/browse/ARROW-17245
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Weston Pace
> Assignee: Vibhatha Lakmal Abeykoon
> Priority: Major
>
> The output order for a Substrait aggregate is:
> {quote}
> The list of distinct columns from each grouping set (ordered by their first
> appearance) followed by the list of measures in declaration order
> {quote}
> However, the current aggregate node in Acero emits measures first and
> grouping set second. This could be fixed with a supplementary project but it
> seems simpler to modify the aggregate node itself. However, this would be a
> backwards incompatible change.
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