findepi opened a new issue, #17623:
URL: https://github.com/apache/datafusion/issues/17623

   `Column::from_qualified_name` uses different implementation of 
`parse_identifiers_normalized` / `parse_identifiers` depending on whether `sql` 
feature is enabled.
   
   It is assume that these implementation are behaviorally different, or may be 
different in the future.
   
   Let's now consider a crate X that uses DataFusion with `sql` feature 
disabled and it depends on particular behavior of `Column::from_qualified_name`.
   
   If the crate is used in a bigger project which causes `sql` feature to be 
enabled, the result is unpredictable to X. The app may not work correctly even 
though each component works and all its tests pass.


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