From 03273cad9cedae7c3108044d371364f702e523ff Mon Sep 17 00:00:00 2001
From: Nikolai Kochetov <nik-kochetov@yandex-team.ru>
Date: Tue, 20 Apr 2021 14:57:52 +0300
Subject: [PATCH] Add test

---
 .../01822_union_and_constans_error.reference  |  1 +
 .../01822_union_and_constans_error.sql        | 20 +++++++++++++++++++
 2 files changed, 21 insertions(+)
 create mode 100644 tests/queries/0_stateless/01822_union_and_constans_error.reference
 create mode 100644 tests/queries/0_stateless/01822_union_and_constans_error.sql

diff --git a/tests/queries/0_stateless/01822_union_and_constans_error.reference b/tests/queries/0_stateless/01822_union_and_constans_error.reference
new file mode 100644
index 00000000000..d00491fd7e5
--- /dev/null
+++ b/tests/queries/0_stateless/01822_union_and_constans_error.reference
@@ -0,0 +1 @@
+1
diff --git a/tests/queries/0_stateless/01822_union_and_constans_error.sql b/tests/queries/0_stateless/01822_union_and_constans_error.sql
new file mode 100644
index 00000000000..38b7df700cd
--- /dev/null
+++ b/tests/queries/0_stateless/01822_union_and_constans_error.sql
@@ -0,0 +1,20 @@
+drop table if exists t0;
+CREATE TABLE t0 (c0 String) ENGINE = Log();
+
+SELECT isNull(t0.c0) OR COUNT('\n?pVa')
+FROM t0
+GROUP BY t0.c0
+HAVING isNull(t0.c0)
+UNION ALL
+SELECT isNull(t0.c0) OR COUNT('\n?pVa')
+FROM t0
+GROUP BY t0.c0
+HAVING NOT isNull(t0.c0)
+UNION ALL
+SELECT isNull(t0.c0) OR COUNT('\n?pVa')
+FROM t0
+GROUP BY t0.c0
+HAVING isNull(isNull(t0.c0))
+SETTINGS aggregate_functions_null_for_empty = 1, enable_optimize_predicate_expression = 0;
+
+drop table if exists t0;