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From wuchong <...@git.apache.org>
Subject [GitHub] flink pull request #4055: [FLINK-6817] [table] Fix NPE when preceding is not...
Date Sat, 03 Jun 2017 12:11:05 GMT
Github user wuchong commented on a diff in the pull request:

    https://github.com/apache/flink/pull/4055#discussion_r119985514
  
    --- Diff: flink-libraries/flink-table/src/main/scala/org/apache/flink/table/api/windows.scala
---
    @@ -91,6 +91,10 @@ class OverWindowWithOrderBy(
         */
       def as(alias: Expression): OverWindow = {
     
    +    if (null == preceding) {
    --- End diff --
    
    Thank you. I think it's a good idea.


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