From d9761b65064cbc2c46120b0a2c2d2e025dbfb0f6 Mon Sep 17 00:00:00 2001
From: alexey-milovidov <milovidov@yandex-team.ru>
Date: Thu, 13 Apr 2017 23:28:18 +0400
Subject: [PATCH] Update Block.cpp

---
 dbms/src/Core/Block.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dbms/src/Core/Block.cpp b/dbms/src/Core/Block.cpp
index d26a6ba74bf..8e17dcc5ca1 100644
--- a/dbms/src/Core/Block.cpp
+++ b/dbms/src/Core/Block.cpp
@@ -608,7 +608,7 @@ void Block::unshareColumns()
 
 void Block::updateHash(SipHash & hash) const
 {
-    for (size_t row_no = 0; row_no < rows(); ++row_no)
+    for (size_t row_no = 0, num_rows = rows(); row_no < num_rows; ++row_no)
     {
         for (auto & col : getColumns())
             col.column->updateHashWithValue(row_no, hash);