snuyanzin commented on PR #22558:
URL: https://github.com/apache/flink/pull/22558#issuecomment-1603319716

   Sorry for the delay
   it took a bit longer to find out the root cause.
   
   :see_no_evil: seems the reason was that between announcement of 1.31.0 
commit and preparing for the next iteration there was another one 
https://github.com/apache/calcite/commit/8844146182c4220c0747e46dcfb745288df7e39c
 ([[CALCITE-4989](https://issues.apache.org/jira/browse/CALCITE-4989)] Nested 
JSON_OBJECT creation does not produce proper json). It introduces a new 
property `AddJsonTypeOperatorEnabled` and makes it `true` by default... 
Depending property value it makes some extra query rewrites... As experiment 
shown it impacts `DagOptimization`. Setting property to `false` (Calcite 1.30.0 
behavior)  solves the issue and no changes at `DagOptimization` are required.
   
   Sorry, I should have realized it earlier
   
   Also rebased PRs since libssl version bumped and old version started to be a 
reason of failures.


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