[
https://issues.apache.org/jira/browse/ARROW-10043?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Andy Grove resolved ARROW-10043.
--------------------------------
Fix Version/s: 2.0.0
Resolution: Fixed
Issue resolved by pull request 8222
[https://github.com/apache/arrow/pull/8222]
> [Rust] [DataFusion] Introduce support for DISTINCT by partially implementing
> COUNT(DISTINCT)
> --------------------------------------------------------------------------------------------
>
> Key: ARROW-10043
> URL: https://issues.apache.org/jira/browse/ARROW-10043
> Project: Apache Arrow
> Issue Type: Wish
> Components: Rust, Rust - DataFusion
> Reporter: Daniel Russo
> Assignee: Daniel Russo
> Priority: Minor
> Labels: pull-request-available
> Fix For: 2.0.0
>
> Time Spent: 8h 10m
> Remaining Estimate: 0h
>
> I am unsure where support for {{DISTINCT}} may be on the DataFusion roadmap,
> so I've filed this with the "Wish" type and "Minor" priority to reflect that
> this is a proposal:
> Introduce {{DISTINCT}} into DataFusion by partially implementing
> {{COUNT(DISTINCT)}}. The ultimate goal is to fully support the {{DISTINCT}}
> keyword, but to get implementation started, limit the scope of this work to:
> * the {{COUNT()}} aggregate function
> * a single expression in {{COUNT()}}, i.e., {{COUNT(DISTINCT c1)}}, but not
> {{COUNT(DISTINCT c1, c2)}}
> * only queries with a {{GROUP BY}} clause
> * integer types
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
