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https://issues.apache.org/jira/browse/FLINK-5695?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15855567#comment-15855567
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sunjincheng commented on FLINK-5695:
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Hi, [~fhueske] you are right when users simply use "tableapi", users do not
feel "GroupedTable" and "WindowGroupedTable", I am concerned about the design
of table.scala. IMO，at the same Features, table type as little as possible.
BTW, I do not quite understand add "WindowGroupedTable" class . what
window-specific method documentation we can provide, thank you very much if you
can give me a detailed explanation.
thanks,
SunJincheng
> Optimize table type systems based on database semantics
> -------------------------------------------------------
>
> Key: FLINK-5695
> URL: https://issues.apache.org/jira/browse/FLINK-5695
> Project: Flink
> Issue Type: Sub-task
> Components: Table API & SQL
> Reporter: sunjincheng
> Assignee: sunjincheng
>
> Optimize table type systems based on database semantics.As follows:
> {code}
> groupBy
> -------------------->
> Table GroupedTable
> ∧ <-------------------- ∧
> | select&agg |
> | |
> | where |
> | select | groupBy
> | agg |
> | ... |
> | window |
> ∨ --------------------->
> Table WindowedTable
> <---------------------
> select&over
> {code}
> What do you think? [~fhueske]
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