Fixed bug mdev-10883.

When a prepared statement uses a CTE definition with a column list
renaming of columns of the CTE expression  must be performed
for every execution of the prepared statement.

mysql-test/r/cte_recursive.result

@@ -1604,6 +1604,35 @@ id	name	dob	father	mother
 8	Grandpa Ben	1940-10-21	NULL	NULL
 6	Grandgrandma Martha	1923-05-17	NULL	NULL
 drop table my_ancestors;
+#
+# MDEV-10883: execution of prepared statement from SELECT
+#             with recursive CTE that renames columns
+#
+prepare stmt from"
+with recursive
+ancestor_ids (id)
+as
+(
+  select father from folks where name = 'Me'
+  union
+  select mother from folks where name = 'Me'
+  union
+  select father from folks, ancestor_ids a  where folks.id = a.id
+  union
+  select mother from folks, ancestor_ids a  where folks.id = a.id
+)
+select p.* from folks as p, ancestor_ids as a where p.id = a.id;
+";
+execute stmt;
+id	name	dob	father	mother
+20	Dad	1970-02-02	10	9
+30	Mom	1975-03-03	8	7
+10	Grandpa Bill	1940-04-05	NULL	NULL
+9	Grandma Ann	1941-10-15	NULL	NULL
+7	Grandma Sally	1943-08-23	NULL	6
+8	Grandpa Ben	1940-10-21	NULL	NULL
+6	Grandgrandma Martha	1923-05-17	NULL	NULL
+deallocate prepare stmt;
 drop table folks;
 #
 # MDEV-10372: [bb-10.2-mdev9864 tree] EXPLAIN with recursive CTE enters endless recursion

mysql-test/t/cte_recursive.test

@@ -1200,6 +1200,30 @@ select * from my_ancestors;
 
 drop table my_ancestors;
 
+--echo #
+--echo # MDEV-10883: execution of prepared statement from SELECT
+--echo #             with recursive CTE that renames columns
+--echo #
+
+prepare stmt from"
+with recursive
+ancestor_ids (id)
+as
+(
+  select father from folks where name = 'Me'
+  union
+  select mother from folks where name = 'Me'
+  union
+  select father from folks, ancestor_ids a  where folks.id = a.id
+  union
+  select mother from folks, ancestor_ids a  where folks.id = a.id
+)
+select p.* from folks as p, ancestor_ids as a where p.id = a.id;
+";
+execute stmt;
+deallocate prepare stmt;
+
+
 drop table folks;
 
 --echo #

sql/sql_cte.h

@@ -350,6 +350,7 @@ void With_element::reset_recursive_for_exec()
   owner->with_prepared_anchor&= ~mutually_recursive;
   owner->cleaned&= ~get_elem_map();
   cleanup_stabilized();
+  spec->columns_are_renamed= false;
 }