wgtmac commented on code in PR #49527:
URL: https://github.com/apache/arrow/pull/49527#discussion_r2992057467


##########
cpp/src/parquet/file_writer.h:
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@@ -36,6 +36,15 @@ static constexpr uint8_t kParquetEMagic[4] = {'P', 'A', 'R', 
'E'};
 
 class PARQUET_EXPORT RowGroupWriter {
  public:
+  // Estimated uncompressed byte sizes of data buffered by column writers
+  // that have not yet been serialized into data pages.

Review Comment:
   Good catch! Thanks for pointing them out.



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