Gabriel39 opened a new pull request, #66441:
URL: https://github.com/apache/doris/pull/66441

   ### What
   
   - Cache whether a Parquet schema subtree contains Variant data.
   - Build Variant physical types and materialization plans only for 
Variant-containing columns.
   - Keep ordinary Parquet scans on their existing logical-type path.
   
   ### Why
   
   Variant planning was performed for every projected column and row group, 
even when the schema contained no Variant data. This added repeated schema 
traversal and allocation overhead to ordinary scans.
   
   ### Validation
   
   - Cherry-picked cleanly onto the latest `branch-4.1`.
   - The resulting patch is equivalent to the original isolated fix.
   - Local tests were not run for this cherry-pick-only PR.
   


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