psvri commented on issue #9253:
URL: 
https://github.com/apache/arrow-datafusion/issues/9253#issuecomment-1949071669

   Yes, I know it can be easily replaced. But the issue I created is to get a 
consensus on what is to be supported.
   
   Going over the differences some more, here is a list of functions common 
across postgres and spark not present in datafusion. Should we add them here or 
keep datafusion minimal ?
   
   - Soundex 
[postgres](https://www.postgresql.org/docs/current/fuzzystrmatch.html#FUZZYSTRMATCH-SOUNDEX)
 [spark](https://spark.apache.org/docs/latest/api/sql/index.html#soundex)
   - bit string functions 
[postgres](https://www.postgresql.org/docs/current/functions-bitstring.html) 
[spark](https://spark.apache.org/docs/latest/api/sql/index.html#bit_count)
   - json related functions e.g 
[postgres](https://www.postgresql.org/docs/current/functions-json.html) 
spark(https://spark.apache.org/docs/latest/api/sql/index.html#to_json)


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