Timo Walther created FLINK-25217: ------------------------------------ Summary: FLIP-190: Support Version Upgrades for Table API & SQL Programs Key: FLINK-25217 URL: https://issues.apache.org/jira/browse/FLINK-25217 Project: Flink Issue Type: New Feature Components: Table SQL / API, Table SQL / Planner Reporter: Timo Walther
Nowadays, the Table & SQL API is as important to Flink as the DataStream API. It is one of the main abstractions for expressing pipelines that perform stateful stream processing. Users expect the same backwards compatibility guarantees when upgrading to a newer Flink version as with the DataStream API. In particular, this means: * once the operator topology is defined, it remains static and does not change between Flink versions, unless resulting in better performance, * business logic (defined using expressions and functions in queries) behaves identical as before the version upgrade, * the state of a Table & SQL API program can be restored from a savepoint of a previous version, * adding or removing stateful operators should be made possible in the DataStream API. The same query can remain up and running after upgrades. https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=191336489 -- This message was sent by Atlassian Jira (v8.20.1#820001)