From a58b152140f589ed0ae67ef9b3f0a429450ef800 Mon Sep 17 00:00:00 2001
From: Nikolai Kochetov <nik-kochetov@yandex-team.ru>
Date: Sat, 20 Jun 2020 13:40:53 +0300
Subject: [PATCH] Fix build.

---
 src/Processors/QueryPlan/IQueryPlanStep.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/Processors/QueryPlan/IQueryPlanStep.h b/src/Processors/QueryPlan/IQueryPlanStep.h
index 938ddda81b1..4f9e4d3268c 100644
--- a/src/Processors/QueryPlan/IQueryPlanStep.h
+++ b/src/Processors/QueryPlan/IQueryPlanStep.h
@@ -14,8 +14,8 @@ class DataStream
 public:
     Block header;
 
-    NameSet distinct_columns;
-    NameSet local_distinct_columns; /// Those columns are distinct in separate thread, but not in general.
+    NameSet distinct_columns = {};
+    NameSet local_distinct_columns = {}; /// Those columns are distinct in separate thread, but not in general.
 
     /// Things which may be added:
     /// * sort description