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https://issues.apache.org/jira/browse/FLINK-19419?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17203619#comment-17203619
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Jark Wu commented on FLINK-19419:
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[~caozhen1937], we HAVE TO use an specific string literal to represent
{{null}}, this is controlled by {{null-string-literal}}. If users define
"null-string-literal=null", that means users are aware of it, then we have to
return {{null}} instead of {{"null"}} string when reading a "null" string. If
users want to keep the "null" string, he/she can change the config of
{{null-string-literal=null}}.
> "null-string-literal" does not work in HBaseSource decoder
> ------------------------------------------------------------
>
> Key: FLINK-19419
> URL: https://issues.apache.org/jira/browse/FLINK-19419
> Project: Flink
> Issue Type: Bug
> Components: Connectors / HBase
> Affects Versions: 1.11.0, 1.11.1, 1.11.2
> Reporter: CaoZhen
> Priority: Minor
> Labels: pull-request-available
> Attachments: image-2020-09-25-21-11-36-418.png
>
>
>
> When using HBaseSoucre, it is found that "null-string-literal" does not work.
> The current decoder processing logic is shown below.
> `nullStringBytes` should be used when the `value` is null.
>
> !image-2020-09-25-21-11-36-418.png!
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