huymq1710 opened a new pull request, #24158:
URL: https://github.com/apache/datafusion/pull/24158

   ## Which issue does this PR close?
   
   - Closes #22095
   
   ## Rationale for this change
   
   Nested literal types could mismatch the declared `VirtualTable` schema, 
causing valid Values plans to fail
   
   ## What changes are included in this PR?
   
   - Convert Values literals using expected schema fields
   - Preserve nested Struct, List, and Map nullability
   - Keep schema-less literal conversion unchanged
   
   ## Are these changes tested?
   
   Yes,
   Added unit, round-trip, deprecated Values, and integration tests
   
   ## Are there any user-facing changes?
   
   Substrait Values plans now preserve nested nullability and avoid 
schema/literal type mismatches
   


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