aalexandrov opened a new pull request, #11456:
URL: https://github.com/apache/datafusion/pull/11456

   ## Which issue does this PR close?
   
   Closes the planning part of #10048. The query from the issue will now fail 
in the optimization phase similar to #6140.
   
   ## Rationale for this change
   
   Adds an unsupported fragment of the SQL syntax.
   
   ## What changes are included in this PR?
   
   Extends the planner with support for `LATERAL` subqueries. See the tests 
added in `sql_integration.rs` for details.
   
   ## Are these changes tested?
   
   Yes, I added tests in `sql_integration.rs`.
   
   ## Are there any user-facing changes?
   
   If there are user-facing changes then we may require documentation to be 
updated before approving the PR.
   
   If we document the supported SQL fragment in the user-facing docs as 
BNF-style diagrams we might want to adapt those.
   
   <!--
   If there are any breaking changes to public APIs, please add the `api 
change` label.
   -->
   
   I don't think so.


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