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https://issues.apache.org/jira/browse/FLINK-11066?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16718759#comment-16718759
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Timo Walther commented on FLINK-11066:
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Thanks for working on this [~hequn8128]. These interfaces clearly belong into
{{flink-table-spi}} but this is a problem that I have not considered so far.
Maybe [~aljoscha] can give us some advice here? Currently, {{spi}} only depends
on {{flink-core}}, if we would add {{flink-streaming-java}} as a dependency we
would pull it into all formats and connectors. Or we declare it as an optional
dependency?
> Migrate main Table API classes to flink-table-api-base
> ------------------------------------------------------
>
> Key: FLINK-11066
> URL: https://issues.apache.org/jira/browse/FLINK-11066
> Project: Flink
> Issue Type: New Feature
> Components: Table API & SQL
> Reporter: Timo Walther
> Priority: Major
>
> This issue covers the forth step of the migration plan mentioned in
> [FLIP-28|https://cwiki.apache.org/confluence/display/FLINK/FLIP-28%3A+Long-term+goal+of+making+flink-table+Scala-free].
> The most important API classes such as TableEnvironments and Table are
> exposing a lot of protected methods in Java. Migrating those classes makes
> the API clean and the implementation ready for a major refactoring for the
> new catalog support. We can also think about a separation of interface and
> implementation; e.g. {{Table}} & {{TableImpl}}. However, the current API
> design makes this difficult as we are using constructors of interfaces {{new
> Table(...)}}.
> This issue tracks efforts of porting API classes.
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