Re: [I] Spark-compatible CAST operation [datafusion]

["Blizzara (via GitHub)" <gi...@apache.org>]

Blizzara commented on issue #11201:
URL: https://github.com/apache/datafusion/issues/11201#issuecomment-2206915698

   There's definitely difference in some functions as well, but those have been mostly minor so far (I haven't gotten to regexps or date/time stuff yet), like returning null vs throwing on overflow.
   
   I did confirm today I can use Comet's scalar functions by overriding the existing ScalarUDFs in DF, that's quite nice! 
   
   For Expr::Cast that doesn't work as it's part of the Expr enum rather than being a ScalarUDF - is that by choice, or just pending migration? But I plan to try if I can use FunctionRewrite to change the Expr::Cast into a ScalarUDF that uses the Comet cast.


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