From f6766c89c4098339f1bd1361d94d287002006abe Mon Sep 17 00:00:00 2001
From: Alexey Milovidov <milovidov@yandex-team.ru>
Date: Mon, 19 Feb 2018 07:11:55 +0300
Subject: [PATCH] Added method "getHeader" in IBlockOutputStream: development
 [#CLICKHOUSE-2]

---
 dbms/src/DataStreams/MergeSortingBlockInputStream.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dbms/src/DataStreams/MergeSortingBlockInputStream.h b/dbms/src/DataStreams/MergeSortingBlockInputStream.h
index 613169899d8..b61f28bc23f 100644
--- a/dbms/src/DataStreams/MergeSortingBlockInputStream.h
+++ b/dbms/src/DataStreams/MergeSortingBlockInputStream.h
@@ -38,7 +38,7 @@ public:
     bool isSortedOutput() const override { return true; }
     const SortDescription & getSortDescription() const override { return description; }
 
-    Block getHeader() const override { return children.at(0)->getHeader(); }
+    Block getHeader() const override { return blocks.at(0)->cloneEmpty(); }
 
 protected:
     Block readImpl() override;