ankitsultana commented on PR #10423:
URL: https://github.com/apache/pinot/pull/10423#issuecomment-1469446573

   Thanks.. this is good to see. One note: this is setting nullability at 
table-level.
   
   Most of our use-cases require nullability to be set at column-level. People 
want do things like IS NULL on some columns while at the same time they want to 
use sub-queries with semi-joins (`uuid IN (...)`), so they want `uuid` to be 
non-null.
   
   I think long-term we may want column level nullability, in which case we may 
need to think how backwards compatibility will be handled if we go with table 
level nullability right now.


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