[jira] [Closed] (FLINK-6817) Fix NPE when preceding is not set in OVER window

["Jark Wu (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-6817?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jark Wu closed FLINK-6817.
--------------------------
    Resolution: Fixed

Fixed in 5f63bf98c3dc7c1fe28630300b68179b6700dcad for master
Fixed in 88fbe2ac83f08074467c33b48e981b7ba9d1032f for 1.3

> Fix NPE when preceding is not set in OVER window
> ------------------------------------------------
>
>                 Key: FLINK-6817
>                 URL: https://issues.apache.org/jira/browse/FLINK-6817
>             Project: Flink
>          Issue Type: Bug
>          Components: Table API & SQL
>            Reporter: Jark Wu
>            Assignee: Jark Wu
>            Priority: Minor
>             Fix For: 1.4.0
>
>
> When preceding is not set in over window , a NPE will be thrown:
> {code}
> val result = table
>       .window(Over orderBy 'rowtime as 'w)
>       .select('c, 'a.count over 'w)
> {code}
> {code}
> java.lang.NullPointerException
> 	at org.apache.flink.table.api.OverWindowWithOrderBy.as(windows.scala:97)
> {code}
> Preceding must be set in OVER window, so should throw a more explicit exception not a NPE



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