XiaoHongbo-Hope opened a new pull request, #8848:
URL: https://github.com/apache/paimon/pull/8848

   ### Purpose
   
   PyArrow can raise `Nested data conversions not implemented for chunked array 
outputs` when a projected VARIANT child is decoded into multiple chunks, 
including within one row group.
   
   Read projected Parquet VARIANT columns with bounded 
`ParquetFile.iter_batches()` calls while preserving projection, predicates, 
filter-only columns, and row-group pruning.
   
   ### Tests
   
   - Synthetic single-row-group reproducer failed before the fix and passes 
after it.
   - Relevant Python tests: 119 passed.
   - PyArrow 6 compatibility: 6 passed, 1 skipped.


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