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Posted to issues@spark.apache.org by "Dongjoon Hyun (Jira)" <ji...@apache.org> on 2020/02/05 01:20:00 UTC
[jira] [Closed] (SPARK-30726) ANSI SQL: FIRST_VALUE function
[ https://issues.apache.org/jira/browse/SPARK-30726?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Dongjoon Hyun closed SPARK-30726.
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> ANSI SQL: FIRST_VALUE function
> ------------------------------
>
> Key: SPARK-30726
> URL: https://issues.apache.org/jira/browse/SPARK-30726
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: jiaan.geng
> Priority: Major
>
> I have checked PostgreSQL, Vertica, Oracle, Redshift, Presto, Teradata, FIRST_VALUE|LAST_VALUE is always used as a window function, not as an aggregate function.
> The FIRST_VALUE function currently provided can be used as both an aggregation function and a window function.
> Maybe we need to re-implement it.
> Reference discussion in https://github.com/apache/spark/pull/25082
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