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https://issues.apache.org/jira/browse/FLINK-11936?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16817853#comment-16817853
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Timo Walther commented on FLINK-11936:
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Making the AuxiliaryConverter pluggable in Calcite would be nice solution. 
Otherwise we could also think about introducing some early 
conversion/normalization rule to convert to what we need. Aligning our windows 
with Calcite's windows might not be possible as we have slightly different 
semantics because of watermarks (window end is always {{watermark-1}}?).

> Remove AuxiliaryConverter pull-in from calcite and fix auxiliary converter 
> issue.
> ---------------------------------------------------------------------------------
>
>                 Key: FLINK-11936
>                 URL: https://issues.apache.org/jira/browse/FLINK-11936
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Table SQL / API
>            Reporter: Rong Rong
>            Assignee: Rong Rong
>            Priority: Major
>
> AuxiliaryConverter was pulled inĀ FLINK-6409. SinceĀ CALCITE-1761 has been 
> fixed, we should sync back with the calcite version.
> After a quick glance, I think it is not so simple to just delete the class so 
> I opened a follow up Jira on this issue.



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