[jira] [Created] (FLINK-21709) Officially deprecate the legacy planner

[Shang Yuanchun (Jira)]

Timo Walther created FLINK-21709:
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             Summary: Officially deprecate the legacy planner
                 Key: FLINK-21709
                 URL: https://issues.apache.org/jira/browse/FLINK-21709
             Project: Flink
          Issue Type: Sub-task
          Components: Documentation, Table SQL / API
            Reporter: Timo Walther
            Assignee: Timo Walther


As discussed in https://lists.apache.org/thread.html/r0851e101e37fbab273775b6a252172c7a9f7c7927107c160de779831%40%3Cdev.flink.apache.org%3E we will perform the following steps in 1.13:

- Deprecate the `flink-table-planner` module
- Deprecate `BatchTableEnvironment` for both Java, Scala, and Python
- Add a notice to release notes and documentation



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