From 342a91df3f06817d8995b7cdaf7db6f01e868a5d Mon Sep 17 00:00:00 2001
From: Ruoxi Sun <zanmato1984@gmail.com>
Date: Wed, 3 Jul 2024 14:23:08 +0800
Subject: [PATCH] Fix the unnecessary extra bytes when encoding row table

---
 cpp/src/arrow/compute/row/encode_internal.cc | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/cpp/src/arrow/compute/row/encode_internal.cc b/cpp/src/arrow/compute/row/encode_internal.cc
index 01d552ef8270f..4a5cb5fb8c0b6 100644
--- a/cpp/src/arrow/compute/row/encode_internal.cc
+++ b/cpp/src/arrow/compute/row/encode_internal.cc
@@ -158,8 +158,7 @@ Status RowTableEncoder::EncodeSelected(RowTableImpl* rows, uint32_t num_selected
   EncoderOffsets::GetRowOffsetsSelected(rows, batch_varbinary_cols_, num_selected,
                                         selection);
 
-  RETURN_NOT_OK(rows->AppendEmpty(static_cast<uint32_t>(0),
-                                  static_cast<uint32_t>(rows->offsets()[num_selected])));
+  RETURN_NOT_OK(rows->AppendEmpty(static_cast<uint32_t>(0), static_cast<uint32_t>(0)));
 
   for (size_t icol = 0; icol < batch_all_cols_.size(); ++icol) {
     if (batch_all_cols_[icol].metadata().is_fixed_length) {