pitrou commented on code in PR #48203:
URL: https://github.com/apache/arrow/pull/48203#discussion_r2556430519
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cpp/src/parquet/encoder.cc:
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@@ -964,10 +1033,22 @@ class ByteStreamSplitEncoder<FLBAType> : public
ByteStreamSplitEncoderBase<FLBAT
if (byte_width_ > 0) {
const int64_t total_bytes = static_cast<int64_t>(num_values) *
byte_width_;
PARQUET_THROW_NOT_OK(sink_.Reserve(total_bytes));
+#if !ARROW_LITTLE_ENDIAN
+ // On big-endian, reverse bytes before encoding to compensate for
+ // DoSplitStreams reversal, ensuring FLBA bytes are preserved as-is
Review Comment:
Same comment as for the decoder part.
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