dtenedor commented on PR #46312:
URL: https://github.com/apache/spark/pull/46312#issuecomment-2088934443

   ```
   previously we could not set a variant default column like
   
   create table t(
           v6 variant default parse_json('{\"k\": \"v\"}')
   )
   ```
   
   @richardc-db this would work if the `ParseJson` expression was 
constant-foldable. Is there a reason we cannot do that? 
   
   
https://github.com/databricks/runtime/blob/bbc6e62658adfbce662a45190c9e755277743e84/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/variant/variantExpressions.scala#L51


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