cloud-fan commented on pull request #35756:
URL: https://github.com/apache/spark/pull/35756#issuecomment-1061533653


   Can we narrow the scope down to only data source scan? For dataset, the type 
is known at compile-time and we can still generate precise code to process 
either `java.sql.Timestamp` or `java.time.Instant`. It's only a problem in data 
source scan that we don't know the datetime jave type at the compile time.


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