From de318f47e0f0995b425ca298585cbcba0b1ca7f3 Mon Sep 17 00:00:00 2001
From: Panchen Xue <pan.panchen.xue@gmail.com>
Date: Tue, 16 Jan 2018 16:51:29 -0500
Subject: [PATCH] Implement ReserveData(int64_t) method for BinaryBuilder

---
 cpp/src/arrow/builder.cc | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/cpp/src/arrow/builder.cc b/cpp/src/arrow/builder.cc
index dac02d14e719b..712e4194526df 100644
--- a/cpp/src/arrow/builder.cc
+++ b/cpp/src/arrow/builder.cc
@@ -1222,10 +1222,14 @@ Status BinaryBuilder::Init(int64_t elements) {
 Status BinaryBuilder::Resize(int64_t capacity) {
   DCHECK_LT(capacity, std::numeric_limits<int32_t>::max());
   // one more then requested for offsets
-  RETURN_NOT_OK(offsets_builder_.Resize((capacity + 1) * sizeof(int64_t)));
-  RETURN_NOT_OK(value_data_builder_.Resize(capacity * sizeof(int64_t)));
+  RETURN_NOT_OK(offsets_builder_.Resize((capacity + 1) * sizeof(int32_t)));
   return ArrayBuilder::Resize(capacity);
 }
+  
+Status BinaryBuilder::ReserveData(int64_t capacity) {
+  DCHECK_LT(capacity, std::numeric_limits<int32_t>::max());
+  return value_data_builder_.Resize(capacity * sizeof(int64_t));
+}
 
 Status BinaryBuilder::AppendNextOffset() {
   const int64_t num_bytes = value_data_builder_.length();