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https://issues.apache.org/jira/browse/FLINK-20785?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Konstantin Knauf updated FLINK-20785:
-------------------------------------
    Issue Type: Improvement  (was: Task)

As part of https://issues.apache.org/jira/browse/FLINK-22029 the "Task" Issue 
Type is removed. I move this ticket to "Improvement". If you think "New 
Feature", "Technical Debt" or "Bug" is more appropriate, please change the 
ticket accordingly.

> MapRelDataType for legacy planner has wrong digest
> --------------------------------------------------
>
>                 Key: FLINK-20785
>                 URL: https://issues.apache.org/jira/browse/FLINK-20785
>             Project: Flink
>          Issue Type: Improvement
>          Components: Table SQL / Legacy Planner
>    Affects Versions: 1.12.0
>            Reporter: Danny Chen
>            Priority: Major
>              Labels: stale-major
>
> In the legacy planner, we create the {{MapRelDataType}} ignoring the key and 
> value nullability. If we implements the digest correctly, it would conflict 
> with the logic.



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