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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-6817) Fix NPE when preceding is not set in OVER window
Date Tue, 06 Jun 2017 15:31:18 GMT

    [ https://issues.apache.org/jira/browse/FLINK-6817?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16039086#comment-16039086
] 

ASF GitHub Bot commented on FLINK-6817:
---------------------------------------

Github user fhueske commented on the issue:

    https://github.com/apache/flink/pull/4055
  
    Yes, looks good to me as well. +1 for merging and including in 1.3.1


> 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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