julianhyde opened a new pull request, #3065:
URL: https://github.com/apache/calcite/pull/3065

   This is a breaking change. Clients should either call 
Config.withExpand(true), to keep the old behavior, or ensure that 
SubQueryRemoveRule is enabled during the planning phase.
   
   We believe that the new behavior - expansion during the planning phase 
rather than during sql-to-rel phase - is superior because it handles ANY and 
ALL sub-queries and complex correlated sub-queries.


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