Weiqing Yang created FLINK-38242:
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Summary: Improve upgrading documentation for SQL/Table API state
compatibility and add Flink 2.x to compatibility table
Key: FLINK-38242
URL: https://issues.apache.org/jira/browse/FLINK-38242
Project: Flink
Issue Type: Improvement
Components: Documentation
Reporter: Weiqing Yang
This ticket aims to improve the current upgrading documentation in two areas:
1. **SQL/Table API State Compatibility Warning**: The current compatibility
guidelines do not clearly warn that SQL/Table API jobs can encounter state
incompatibilities during minor version upgrades (e.g., 1.16 → 1.20) due to
changes in query optimizers and operator topologies, giving the impression that
the rules apply uniformly to all job types.
2. **Missing Flink 2.x Versions**: The compatibility table is missing Flink
2.0.x and 2.1.x versions.
Changes needed:
- Add clear warning about SQL/Table API state compatibility in the
Compatibility Table section
- Add Flink 2.0.x and 2.1.x rows to the compatibility table
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