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From "jiaan.geng (Jira)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-28664) ORDER BY in aggregate function
Date Tue, 10 Dec 2019 10:56:00 GMT

    [ https://issues.apache.org/jira/browse/SPARK-28664?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16992427#comment-16992427
] 

jiaan.geng commented on SPARK-28664:
------------------------------------

[https://github.com/postgres/postgres/blob/44e95b5728a4569c494fa4ea4317f8a2f50a206b/src/test/regress/expected/aggregates.out#L2239]

[~yumwang] I didn't understand the meaning of this syntax . If it is valuable, I
will do it.

> ORDER BY in aggregate function
> ------------------------------
>
>                 Key: SPARK-28664
>                 URL: https://issues.apache.org/jira/browse/SPARK-28664
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>    Affects Versions: 3.0.0
>            Reporter: Yuming Wang
>            Priority: Major
>
> {code:sql}
> SELECT min(x ORDER BY y) FROM (VALUES(1, NULL)) AS d(x,y);
> SELECT min(x ORDER BY y) FROM (VALUES(1, 2)) AS d(x,y);
> {code}
> https://github.com/postgres/postgres/blob/44e95b5728a4569c494fa4ea4317f8a2f50a206b/src/test/regress/sql/aggregates.sql#L978-L982



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