1 files changed, 49 insertions, 2 deletions
diff --git a/mysql-test/main/cte_nonrecursive.test b/mysql-test/main/cte_nonrecursive.test
index 951d7788591..5af5cf04b66 100644
--- a/mysql-test/main/cte_nonrecursive.test
+++ b/mysql-test/main/cte_nonrecursive.test
@@ -1205,7 +1205,9 @@ DROP TABLE test.t;
 --echo # MDEV-22781: create view with CTE without default database
 --echo #
 
-drop database test;
+create database db;
+use db;
+drop database db;
 create database db1;
 create table db1.t1 (a int);
 insert into db1.t1 values (3),(7),(1);
@@ -1227,7 +1229,6 @@ drop view db1.v1;
 drop table db1.t1;
 drop database db1;
 
-create database test;
 use test;
 
 --echo #
@@ -1578,6 +1579,52 @@ drop function g;
 drop function f;
 drop table t1;
 
+--echo #
+--echo # MDEV-27086: union using CTEs in CREATE TABLE
+--echo #
+
+create or replace temporary table tmp as
+with cte1 as (select 1 as a), cte2 as (select 2 as a)
+select * from cte1 union select * from cte2;
+select * from tmp;
+
+create table t1 as
+with cte1 as (select 1 as a), cte2 as (select 2 as a)
+select * from cte1 union select * from cte2;
+select * from t1;
+
+insert into t1 values (3);
+
+create table t2 as
+with cte1 as (select * from t1 where a <2), cte2 as (select * from t1 where a > 2)
+select * from cte1 union select * from cte2;
+select * from t2;
+
+drop table t1,t2;
+
+--echo #
+--echo # MDEV-26470: CTE in WITH clause of subquery used in DELETE
+--echo #
+
+create table t1 (a int);
+insert into t1 values (3), (7), (1), (5);
+
+create table t2 (b int);
+insert into t2 values (4), (1), (3), (2);
+
+delete from t1
+  where a in (with cte(a) as (select * from t2 where b <=2) select a from cte);
+select * from t1;
+
+insert into t1 values (1), (3);
+
+delete t1 from t1, t2
+  where t1.a=t2.b or
+        t1.a in (with cte(a) as (select b+1 from t2) select * from cte);
+select * from t1;
+
+drop table t1,t2;
+
 --echo # End of 10.2 tests
 
 --echo #