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Posted to dev@flink.apache.org by "Timo Walther (Jira)" <ji...@apache.org> on 2021/09/30 10:48:00 UTC

[jira] [Created] (FLINK-24427) Hide Scala in flink-table-planner from API

Timo Walther created FLINK-24427:
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             Summary: Hide Scala in flink-table-planner from API
                 Key: FLINK-24427
                 URL: https://issues.apache.org/jira/browse/FLINK-24427
             Project: Flink
          Issue Type: Sub-task
          Components: API / Scala, Table SQL / API, Table SQL / Planner
            Reporter: Timo Walther


FLIP-32 has decoupled the planner from the API. However, the planner code base is still the largest Scala code base we have in Flink that we cannot port to Java easily.

In order to allow arbitrary Scala versions in the user API, we suggest to hide the Scala version of the planner from the Scala version of the API. The API is mostly developed in Java and contains only a couple of classes implemented in Scala. Those should be easier to maintain for various Scala versions. The planner is already discovered via Java SPI.



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