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https://issues.apache.org/jira/browse/FLINK-3140?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15093965#comment-15093965
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ASF GitHub Bot commented on FLINK-3140:
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Github user twalthr commented on the pull request:
https://github.com/apache/flink/pull/1465#issuecomment-170930122
Sorry, I mixed up atomic and basic types. I forgot that a flat comparators
list could also contain GenericTypes etc.
Can we assume that the orders of the flat comparators returned by the
`wrappedComparator` are equal to the orders of the `wrappedComparator` itself?
> NULL value data layout in Row Serializer/Comparator
> ---------------------------------------------------
>
> Key: FLINK-3140
> URL: https://issues.apache.org/jira/browse/FLINK-3140
> Project: Flink
> Issue Type: Sub-task
> Components: Table API
> Reporter: Chengxiang Li
> Assignee: Timo Walther
>
> To store/materialize NULL value in Row objects, we should need new Row
> Serializer/Comparator which is aware of NULL value fields.
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