paleolimbot opened a new issue, #155:
URL: https://github.com/apache/sedona-db/issues/155

   This is admittedly a niche use, but I ran into this when trying to write a 
recursive CTE-like Python loop to do stream network traversal...I was trying to 
`UNION ALL` the original input with one of the geometry fields set to NULL.
   
   ```python
   import sedona.db
   
   sd = sedona.db.connect()
   
   sd.sql("SELECT ST_SetCrs(NULL, 'EPSG:26920')")
   #> SedonaError: st_setcrs([Arrow(Null), Arrow(Utf8)]): No kernel matching 
arguments
   
   sd.sql("SELECT ST_SetSRID(NULL, 26920)")
   #> SedonaError: st_setsrid([Arrow(Null), Arrow(Int64)]): No kernel matching 
arguments
   ```


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