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https://issues.apache.org/jira/browse/FLINK-11068?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16777907#comment-16777907
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Timo Walther commented on FLINK-11068:
--------------------------------------

[~yanghua] this is a very crucial task to unblock other teams. Would it be ok 
for you if somebody else could take over? [~hequn8128] might be interested 
based on [~sunjincheng121]'s current pull request?

> Convert the API classes *Table, *Window to interfaces
> -----------------------------------------------------
>
>                 Key: FLINK-11068
>                 URL: https://issues.apache.org/jira/browse/FLINK-11068
>             Project: Flink
>          Issue Type: Improvement
>          Components: Table API & SQL
>            Reporter: Timo Walther
>            Assignee: vinoyang
>            Priority: Major
>
> A more detailed description can be found in 
> [FLIP-32|https://cwiki.apache.org/confluence/display/FLINK/FLIP-32%3A+Restructure+flink-table+for+future+contributions].
> This includes: Table, GroupedTable, WindowedTable, WindowGroupedTable, 
> OverWindowedTable, Window, OverWindow
> We can keep the "Table" Scala implementation in a planner module until it has 
> been converted to Java.
> We can add a method to the planner later to give us a concrete instance. This 
> is one possibility to have a smooth transition period instead of changing all 
> classes at once.



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