From a23813383d60a0477e219ee4b2e4c17e6019e644 Mon Sep 17 00:00:00 2001
From: Alexey Milovidov <milovidov@yandex-team.ru>
Date: Thu, 8 Aug 2019 03:48:43 +0300
Subject: [PATCH] Attempt to fix performance test

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

diff --git a/dbms/src/DataStreams/NullAndDoCopyBlockInputStream.h b/dbms/src/DataStreams/NullAndDoCopyBlockInputStream.h
index 961f2b77bca..296f198b01a 100644
--- a/dbms/src/DataStreams/NullAndDoCopyBlockInputStream.h
+++ b/dbms/src/DataStreams/NullAndDoCopyBlockInputStream.h
@@ -32,7 +32,7 @@ public:
 
     String getName() const override { return "NullAndDoCopy"; }
 
-    Block getHeader() const override { return input->getHeader(); }
+    Block getHeader() const override { return {}; }
 
 protected:
     Block readImpl() override