WZhuo commented on PR #780:
URL: https://github.com/apache/iceberg-cpp/pull/780#issuecomment-4830171272

   Thanks for the thorough review. All three points addressed:
   
   1. ArrowRowBuilder is now a single RAII class (merged the two classes), 
moved to core level, with `Make(const Schema&)` and `Make(const ArrowSchema*)` 
overloads so both metadata tables and lower-level code like 
position_delete_writer/manifest_adapter can use it.
   
   2. Append* helpers are free functions alongside ArrowRowBuilder: null, int 
(int32/int64/timestamp), boolean, string, and string_map.
   
   3. The lifecycle is properly guarded: `ArrowArrayGuard` right after 
`InitFromSchema`, `Release()` after `StartAppending` succeeds. Also added 
`Release()` to `ArrowArrayGuard` for other call sites to reuse this pattern.


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