From 8d4ccb40de5a956cc412df58698176c3e9c0488c Mon Sep 17 00:00:00 2001
From: vdimir <vdimir@yandex-team.ru>
Date: Thu, 17 Jun 2021 14:20:48 +0300
Subject: [PATCH] Add test from issue #20624

---
 tests/queries/0_stateless/01101_literal_column_clash.reference | 1 +
 tests/queries/0_stateless/01101_literal_column_clash.sql       | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/tests/queries/0_stateless/01101_literal_column_clash.reference b/tests/queries/0_stateless/01101_literal_column_clash.reference
index e63f96416af..b89f59abb18 100644
--- a/tests/queries/0_stateless/01101_literal_column_clash.reference
+++ b/tests/queries/0_stateless/01101_literal_column_clash.reference
@@ -8,3 +8,4 @@ xyzabc	2
 1	0	0	3
 \N	1	2	\N	0
 \N	1	0	\N	3
+2	1
diff --git a/tests/queries/0_stateless/01101_literal_column_clash.sql b/tests/queries/0_stateless/01101_literal_column_clash.sql
index f96aad4bacf..4a6064141ea 100644
--- a/tests/queries/0_stateless/01101_literal_column_clash.sql
+++ b/tests/queries/0_stateless/01101_literal_column_clash.sql
@@ -20,3 +20,6 @@ select null, isConstant(null), * from (select 2 x, null) a right join (select 3
 select cast(1, 'UInt8') from (select arrayJoin([1, 2]) as a) t1 left join (select 1 as b) t2 on b = ignore('UInt8'); -- { serverError 403 }
 
 select isConstant('UInt8'), toFixedString('hello', toUInt8(substring('UInt8', 5, 1))) from (select arrayJoin([1, 2]) as a) t1 left join (select 1 as b) t2 on b = ignore('UInt8');  -- { serverError 403 }
+
+-- https://github.com/ClickHouse/ClickHouse/issues/20624
+select 2 as `toString(x)`, x from (select 1 as x);