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https://issues.apache.org/jira/browse/FLINK-17793?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17276776#comment-17276776
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Kurt Young commented on FLINK-17793:
------------------------------------

I'm curious about `ResolvedSchema`. What exactly properties being resolved in 
schema? Another thing is, right now we don't have a dedicated resolving phase 
in the lifecycle of query processing, where would be the resolving take place?

I'm asking because I think we need to have very clear distinguish between 
`Schema` and `ResolvedSchema`. Every one should now where to use schema and 
where to use ResolvedSchema, otherwise it will still cause chaos and misuse. 

> Replace TableSchema with dedicated CatalogSchema
> ------------------------------------------------
>
>                 Key: FLINK-17793
>                 URL: https://issues.apache.org/jira/browse/FLINK-17793
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Table SQL / API
>            Reporter: Timo Walther
>            Assignee: Timo Walther
>            Priority: Major
>
> The {{TableSchema}} is used for representing the schema of catalog table and 
> the schema of a {{Table}} object and operation. We should split those 
> responsibilities both for a cleaner API and long-term separation of concerns. 
> Connectors should work on a CatalogSchema instead.



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