diff --git a/dbms/tests/queries/0_stateless/00098_1_union_all.reference b/dbms/tests/queries/0_stateless/00098_1_union_all.reference
new file mode 100644
index 00000000000..1191247b6d9
--- /dev/null
+++ b/dbms/tests/queries/0_stateless/00098_1_union_all.reference
@@ -0,0 +1,2 @@
+1
+2
diff --git a/dbms/tests/queries/0_stateless/00098_1_union_all.sql b/dbms/tests/queries/0_stateless/00098_1_union_all.sql
new file mode 100644
index 00000000000..6114f5cfaef
--- /dev/null
+++ b/dbms/tests/queries/0_stateless/00098_1_union_all.sql
@@ -0,0 +1 @@
+SELECT 1 UNION ALL SELECT 2;
diff --git a/dbms/tests/queries/0_stateless/00098_2_union_all.reference b/dbms/tests/queries/0_stateless/00098_2_union_all.reference
new file mode 100644
index 00000000000..1191247b6d9
--- /dev/null
+++ b/dbms/tests/queries/0_stateless/00098_2_union_all.reference
@@ -0,0 +1,2 @@
+1
+2
diff --git a/dbms/tests/queries/0_stateless/00098_2_union_all.sql b/dbms/tests/queries/0_stateless/00098_2_union_all.sql
new file mode 100644
index 00000000000..88f24d7f00b
--- /dev/null
+++ b/dbms/tests/queries/0_stateless/00098_2_union_all.sql
@@ -0,0 +1 @@
+SELECT 1 UNION   ALL SELECT 2;
diff --git a/dbms/tests/queries/0_stateless/00098_3_union_all.reference b/dbms/tests/queries/0_stateless/00098_3_union_all.reference
new file mode 100644
index 00000000000..1191247b6d9
--- /dev/null
+++ b/dbms/tests/queries/0_stateless/00098_3_union_all.reference
@@ -0,0 +1,2 @@
+1
+2
diff --git a/dbms/tests/queries/0_stateless/00098_3_union_all.sql b/dbms/tests/queries/0_stateless/00098_3_union_all.sql
new file mode 100644
index 00000000000..776460cd183
--- /dev/null
+++ b/dbms/tests/queries/0_stateless/00098_3_union_all.sql
@@ -0,0 +1,2 @@
+SELECT 1 UNION /*comment*/ ALL SELECT 2;
+
diff --git a/dbms/tests/queries/0_stateless/00098_4_union_all.reference b/dbms/tests/queries/0_stateless/00098_4_union_all.reference
new file mode 100644
index 00000000000..9355227d376
--- /dev/null
+++ b/dbms/tests/queries/0_stateless/00098_4_union_all.reference
@@ -0,0 +1,3 @@
+1	2
+3	4
+5	6
diff --git a/dbms/tests/queries/0_stateless/00098_4_union_all.sql b/dbms/tests/queries/0_stateless/00098_4_union_all.sql
new file mode 100644
index 00000000000..711b0c3b032
--- /dev/null
+++ b/dbms/tests/queries/0_stateless/00098_4_union_all.sql
@@ -0,0 +1 @@
+SELECT 1,2 UNION ALL SELECT 3,4 UNION ALL SELECT 5,6;
diff --git a/dbms/tests/queries/0_stateless/00098_5_union_all.reference b/dbms/tests/queries/0_stateless/00098_5_union_all.reference
new file mode 100644
index 00000000000..349887b702e
--- /dev/null
+++ b/dbms/tests/queries/0_stateless/00098_5_union_all.reference
@@ -0,0 +1,6 @@
+Alice	1000
+Alice	2000
+Bob	2000
+Bob	2000
+Carol	5000
+Dennis	35000
diff --git a/dbms/tests/queries/0_stateless/00098_5_union_all.sql b/dbms/tests/queries/0_stateless/00098_5_union_all.sql
new file mode 100644
index 00000000000..2def5c03a8f
--- /dev/null
+++ b/dbms/tests/queries/0_stateless/00098_5_union_all.sql
@@ -0,0 +1,15 @@
+DROP TABLE IF EXISTS data2013;
+DROP TABLE IF EXISTS data2014;
+
+CREATE TABLE data2013 (name String, value UInt32) ENGINE = Memory;
+CREATE TABLE data2014 (name String, value UInt32) ENGINE = Memory;
+
+INSERT INTO data2013(name,value) VALUES('Alice', 1000);
+INSERT INTO data2013(name,value) VALUES('Bob', 2000);
+INSERT INTO data2013(name,value) VALUES('Carol', 5000);
+
+INSERT INTO data2014(name,value) VALUES('Alice', 2000);
+INSERT INTO data2014(name,value) VALUES('Bob', 2000);
+INSERT INTO data2014(name,value) VALUES('Dennis', 35000);
+
+SELECT nn,vv FROM (SELECT name AS nn, value AS vv FROM data2013 UNION ALL SELECT name AS nn, value AS vv FROM data2014) ORDER BY nn ASC;
diff --git a/dbms/tests/queries/0_stateless/00098_6_union_all.reference b/dbms/tests/queries/0_stateless/00098_6_union_all.reference
new file mode 100644
index 00000000000..01e79c32a8c
--- /dev/null
+++ b/dbms/tests/queries/0_stateless/00098_6_union_all.reference
@@ -0,0 +1,3 @@
+1
+2
+3
diff --git a/dbms/tests/queries/0_stateless/00098_6_union_all.sql b/dbms/tests/queries/0_stateless/00098_6_union_all.sql
new file mode 100644
index 00000000000..57e9b3aacc0
--- /dev/null
+++ b/dbms/tests/queries/0_stateless/00098_6_union_all.sql
@@ -0,0 +1,2 @@
+SELECT X FROM (SELECT 3 AS X UNION ALL SELECT 2 AS X UNION ALL SELECT 1 AS X) ORDER BY X ASC;
+