[jira] [Updated] (SPARK-28645) Throw an error on window redefinition

["Dylan Guedes (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-28645?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dylan Guedes updated SPARK-28645:
---------------------------------
    Summary: Throw an error on window redefinition  (was: Block redefinition of window)

> Throw an error on window redefinition
> -------------------------------------
>
>                 Key: SPARK-28645
>                 URL: https://issues.apache.org/jira/browse/SPARK-28645
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>    Affects Versions: 3.0.0
>            Reporter: Dylan Guedes
>            Priority: Major
>
> Currently in Spark one could redefine a window. For instance:
> {code:sql}select count(*) OVER w FROM tenk1 WINDOW w AS (ORDER BY unique1), w AS (ORDER BY unique1);{code}
> The window `w` is defined two times. In PgSQL, on the other hand, a thrown will happen:
> {code:sql}ERROR:  window "w" is already defined{code}
>  



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