From f4b47ca194c3f9838ae4d9529dd0fcb942db7ad2 Mon Sep 17 00:00:00 2001
From: Nikolai Kochetov <nik-kochetov@yandex-team.ru>
Date: Mon, 13 Sep 2021 13:35:36 +0300
Subject: [PATCH] Don not add const group by key for query with only having.

---
 src/Interpreters/TreeOptimizer.cpp | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/src/Interpreters/TreeOptimizer.cpp b/src/Interpreters/TreeOptimizer.cpp
index 518c041d785..7c5df3fde4e 100644
--- a/src/Interpreters/TreeOptimizer.cpp
+++ b/src/Interpreters/TreeOptimizer.cpp
@@ -90,12 +90,7 @@ void optimizeGroupBy(ASTSelectQuery * select_query, const NameSet & source_colum
     const FunctionFactory & function_factory = FunctionFactory::instance();
 
     if (!select_query->groupBy())
-    {
-        // If there is a HAVING clause without GROUP BY, make sure we have some aggregation happen.
-        if (select_query->having())
-            appendUnusedGroupByColumn(select_query, source_columns);
         return;
-    }
 
     const auto is_literal = [] (const ASTPtr & ast) -> bool
     {