alamb commented on issue #5568:
URL: 
https://github.com/apache/arrow-datafusion/issues/5568#issuecomment-1466608119

   > should we support all of them like listed here 
https://spark.apache.org/docs/3.2.0/api/sql/ even if not all of them compatible 
with PG
   
   I don't think we have a strong or consistent story here -- my personal 
opinion is to focus on postgres compatibility, and only add spark functions for 
thing that have no postgres equivalent. 
   
   Given DataFusion has all the extension points already, maybe we could add a 
separate crate for "spark_extensions" or something 🤔  that way anyone who 
wanted the spark library functions could have them if they wanted but it could 
be opt in.
   
   


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