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https://issues.apache.org/jira/browse/ARROW-7478?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Neville Dipale resolved ARROW-7478.
-----------------------------------
Fix Version/s: 1.0.0
Resolution: Fixed
Issue resolved by pull request 6115
[https://github.com/apache/arrow/pull/6115]
> [Rust] [DataFusion] Group by expression ignored unless paired with aggregate
> expression
> ---------------------------------------------------------------------------------------
>
> Key: ARROW-7478
> URL: https://issues.apache.org/jira/browse/ARROW-7478
> Project: Apache Arrow
> Issue Type: Bug
> Components: Rust, Rust - DataFusion
> Reporter: Kyle McCarthy
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.0.0
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> GROUP BY expressions are ignored unless the query also contains an aggregate
> expression.
> To reproduce you can execute the following query on the aggregate_test_100
> data set.
> {code:java}
> SELECT c2 FROM aggregate_test_100 GROUP BY c2{code}
> *Expected:*
> {{1}}
> {{2}}
> {{3}}
> {{4}}
> {{5}}
> *Actual:*
> {{2}}
> {{5}}
> {{...98 more rows...}}
>
> The order of the expected isn't necessarily correct since the query doesn't
> contain an ORDER BY expression.
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