Jefffrey commented on issue #18668:
URL: https://github.com/apache/datafusion/issues/18668#issuecomment-3527133715

   That seems to be how it is defined: 
https://datafusion.apache.org/user-guide/sql/scalar_functions.html#map-extract
   
   > Returns a list containing the value for the given key or an empty list if 
the key is not present in the map.
   
   Seems consistent with DuckDB version: 
https://duckdb.org/docs/stable/sql/functions/map#element_atmap-key
   
   > Return the value for a given key as a list, or an empty list if the key is 
not contained in the map. The type of the key provided in the second parameter 
must match the type of the map's keys; else, an error is thrown.


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