From 7ec55de9b037338f1b01ae5dc1f598a38cc72a32 Mon Sep 17 00:00:00 2001
From: Kang <kxiao.tiger@gmail.com>
Date: Thu, 2 Mar 2023 17:55:35 +0800
Subject: [PATCH] use reference to avoid bitmap copy for performance

---
 be/src/olap/rowset/segment_v2/segment_iterator.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/be/src/olap/rowset/segment_v2/segment_iterator.cpp b/be/src/olap/rowset/segment_v2/segment_iterator.cpp
index e75a48ac8a261c..5164561e6f32ed 100644
--- a/be/src/olap/rowset/segment_v2/segment_iterator.cpp
+++ b/be/src/olap/rowset/segment_v2/segment_iterator.cpp
@@ -1688,7 +1688,7 @@ void SegmentIterator::_output_index_result_column(uint16_t* sel_rowid_idx, uint1
         return;
     }
 
-    for (auto iter : _rowid_result_for_index) {
+    for (auto& iter : _rowid_result_for_index) {
         block->insert({vectorized::ColumnUInt8::create(),
                        std::make_shared<vectorized::DataTypeUInt8>(), iter.first});
         if (!iter.second.first) {