path: root/mysql-test/t/cte_nonrecursive.test

create table t1 (a int, b  varchar(32));
insert into t1 values
  (4,'aaaa' ), (7,'bb'), (1,'ccc'), (4,'dd');  
insert into t1 values
  (3,'eee'), (7,'bb'), (1,'fff'), (4,'ggg');
create table t2 (c int);
insert into t2 values
  (2), (4), (5), (3);  

--echo # select certain field in the specification of t
with t as (select a from t1 where b >= 'c') 
  select * from t2,t where t2.c=t.a;
select * from t2, (select a from t1 where b >= 'c') as t
   where t2.c=t.a;
explain 
with t as (select a from t1 where b >= 'c') 
  select * from t2,t where t2.c=t.a;
explain
select * from t2, (select a from t1 where b >= 'c') as t
   where t2.c=t.a;

--echo # select '*' in the specification of t
with t as (select * from t1 where b >= 'c') 
  select * from t2,t where t2.c=t.a;
select * from t2, (select * from t1 where b >= 'c') as t
   where t2.c=t.a;
explain
with t as (select * from t1 where b >= 'c') 
  select * from t2,t where t2.c=t.a;
explain
select * from t2, (select * from t1 where b >= 'c') as t
   where t2.c=t.a;

--echo # rename fields returned by the specication when defining t
with t(f1,f2) as (select * from t1 where b >= 'c') 
  select * from t2,t where t2.c=t.f1;
explain
with t(f1,f2) as (select * from t1 where b >= 'c') 
  select * from t2,t where t2.c=t.f1;

--echo # materialized query specifying t
with t as (select a, count(*) from t1 where b >= 'c' group by a) 
 select * from t2,t where t2.c=t.a;
select * from t2, (select a, count(*) from t1 where b >= 'c' group by a) as t 
 where t2.c=t.a;
explain
with t as (select a, count(*) from t1 where b >= 'c' group by a) 
 select * from t2,t where t2.c=t.a;
explain
select * from t2, (select a, count(*) from t1 where b >= 'c' group by a) as t 
  where t2.c=t.a;

--echo # specivication of t contains having
with t as (select a, count(*) from t1 where b >= 'c'
             group by a having count(*)=1 ) 
 select * from t2,t where t2.c=t.a; 
select * from t2, (select a, count(*) from t1 where b >= 'c'
                      group by a having count(*)=1) t
 where t2.c=t.a; 

--echo # main query contains having
with t as (select * from t2 where c <= 4) 
  select a, count(*) from t1,t where t1.a=t.c group by a having count(*)=1; 
select a, count(*) from t1, (select * from t2 where c <= 4) t 
  where t1.a=t.c group by a having count(*)=1; 

--echo # main query contains group by + order by
with t as (select * from t2 where c <= 4 ) 
  select a, count(*) from t1,t where t1.a=t.c group by a order by count(*); 
select a, count(*) from t1, (select * from t2 where c <= 4 ) t
  where t1.a=t.c group by a order by count(*); 

--echo # main query contains group by + order by + limit
with t as (select * from t2 where c <= 4 ) 
  select a, count(*) from t1,t
    where t1.a=t.c group by a order by count(*) desc limit 1; 
select a, count(*) from t1, (select * from t2 where c <= 4 ) t
  where t1.a=t.c group by a order by count(*) desc limit 1; 


--echo # t is used in a subquery
with t as (select a from t1 where a<5)
  select * from t2 where c in (select a from t);
select * from t2 
  where c in (select a from (select a from t1 where a<5) as t);
explain
with t as (select a from t1 where a<5)
  select * from t2 where c in (select a from t);
explain
select * from t2 
  where c in (select a from (select a from t1 where a<5) as t);

--echo # materialized t is used in a subquery
with t as (select count(*) as c from t1 where b >= 'c' group by a)
  select * from t2 where c in (select c from t);
select * from t2
  where c in (select c from (select count(*) as c from t1
                               where b >= 'c' group by a) as t);
explain
with t as (select count(*) as c from t1 where b >= 'c' group by a)
  select * from t2 where c in (select c from t);
explain
select * from t2
  where c in (select c from (select count(*) as c from t1
                               where b >= 'c' group by a) as t);

--echo # two references to t specified by a query
--echo # selecting a field:  both in main query
with t as (select a from t1 where b >= 'c')
  select * from t as r1, t as r2 where r1.a=r2.a;
select * from (select a from t1 where b >= 'c') as r1,
              (select a from t1 where b >= 'c') as r2 
  where r1.a=r2.a;
explain
with t as (select a from t1 where b >= 'c')
  select * from t as r1, t as r2 where r1.a=r2.a;
explain
select * from (select a from t1 where b >= 'c') as r1,
              (select a from t1 where b >= 'c') as r2 
  where r1.a=r2.a;

--echo # two references to materialized t: both in main query
with t as (select distinct a from t1 where b >= 'c')
  select * from t as r1, t as r2 where r1.a=r2.a;
select * from (select distinct a from t1 where b >= 'c') as r1,
              (select distinct a from t1 where b >= 'c') as r2 
  where r1.a=r2.a;
explain
with t as (select distinct a from t1 where b >= 'c')
  select * from t as r1, t as r2 where r1.a=r2.a;
explain
select * from (select distinct a from t1 where b >= 'c') as r1,
              (select distinct a from t1 where b >= 'c') as r2 
  where r1.a=r2.a;

--echo # two references to t specified by a query
--echo # selecting all fields:  both in main query
with t as (select * from t1 where b >= 'c')
  select * from t as r1, t as r2 where r1.a=r2.a;
select * from (select * from t1 where b >= 'c') as r1,
              (select * from t1 where b >= 'c') as r2
  where r1.a=r2.a;
explain
with t as (select * from t1 where b >= 'c')
  select * from t as r1, t as r2 where r1.a=r2.a;
explain
select * from (select * from t1 where b >= 'c') as r1,
              (select * from t1 where b >= 'c') as r2
  where r1.a=r2.a;

--echo # two references to t specifying explicitly column names
with t(c) as (select a from t1 where b >= 'c')
  select * from t r1, t r2 where r1.c=r2.c;

--echo # t two references of t used in different parts of a union
with t as (select a from t1 where b >= 'c')
  select * from t where a < 2
  union
  select * from t where a >= 4;
select * from (select a from t1 where b >= 'c') as t
  where t.a < 2
union
select * from (select a from t1 where b >= 'c') as t
  where t.a >= 4;
explain
with t as (select a from t1 where b >= 'c')
  select * from t where a < 2
  union
  select * from t where a >= 4;
explain
select * from (select a from t1 where b >= 'c') as t
  where t.a < 2
union
select * from (select a from t1 where b >= 'c') as t
  where t.a >= 4;

--echo # specification of t contains union
with t as (select a from t1 where b >= 'f' 
           union
           select c as a from t2 where c < 4) 
  select * from t2,t where t2.c=t.a;
select * from t2, 
              (select a from t1 where b >= 'f' 
               union
               select c as a from t2 where c < 4) as t 
 where t2.c=t.a;
explain
with t as (select a from t1 where b >= 'f' 
           union
           select c as a from t2 where c < 4) 
  select * from t2,t where t2.c=t.a;
explain
select * from t2, 
              (select a from t1 where b >= 'f' 
               union
               select c as a from t2 where c < 4) as t 
 where t2.c=t.a;

--echo # t is defined in the with clause of a subquery
select t1.a,t1.b from t1,t2
  where t1.a>t2.c and
        t2.c in (with t as (select * from t1 where t1.a<5)
                   select t2.c from t2,t where t2.c=t.a);
select t1.a,t1.b from t1,t2
  where t1.a>t2.c and
        t2.c in (select t2.c
                   from t2,(select * from t1 where t1.a<5) as t
                   where t2.c=t.a);
explain
select t1.a,t1.b from t1,t2
  where t1.a>t2.c and
        t2.c in (with t as (select * from t1 where t1.a<5)
                   select t2.c from t2,t where t2.c=t.a);
explain
select t1.a,t1.b from t1,t2
  where t1.a>t2.c and
        t2.c in (select t2.c
                   from t2,(select * from t1 where t1.a<5) as t
                   where t2.c=t.a);

--echo # two different definitions of t: one in the with clause of the main query,
--echo # the other in the with clause of a subquery 
with t as (select c from t2 where c >= 4)
  select t1.a,t1.b from t1,t
    where t1.a=t.c and
          t.c in (with t as (select * from t1 where t1.a<5)
                    select t2.c from t2,t where t2.c=t.a);
select t1.a,t1.b from t1, (select c from t2 where c >= 4) as t
  where t1.a=t.c and
        t.c in (select t2.c from t2,  (select * from t1 where t1.a<5) as t
                 where t2.c=t.a);
explain
with t as (select c from t2 where c >= 4)
  select t1.a,t1.b from t1,t
    where t1.a=t.c and
          t.c in (with t as (select * from t1 where t1.a<5)
                    select t2.c from t2,t where t2.c=t.a);
explain
select t1.a,t1.b from t1, (select c from t2 where c >= 4) as t
  where t1.a=t.c and
        t.c in (select t2.c from t2,  (select * from t1 where t1.a<5) as t
                 where t2.c=t.a);

--echo # another with table tt is defined in the with clause of a subquery
--echo # from the specification of t
with t as (select * from t1
              where a>2 and
                    b in (with tt as (select * from t2 where t2.c<5)
                           select t1.b from t1,tt where t1.a=tt.c))
  select t.a, count(*) from t1,t where t1.a=t.a  group by t.a;
select t.a, count(*)
  from t1,
       (select * from t1
          where a>2 and
                b in (select t1.b
                        from t1,
                             (select * from t2 where t2.c<5) as tt
                          where t1.a=tt.c)) as t
    where t1.a=t.a  group by t.a;
explain
with t as (select * from t1
              where a>2 and
                    b in (with tt as (select * from t2 where t2.c<5)
                           select t1.b from t1,tt where t1.a=tt.c))
  select t.a, count(*) from t1,t where t1.a=t.a  group by t.a;
explain
select t.a, count(*)
  from t1,
       (select * from t1
          where a>2 and
                b in (select t1.b
                        from t1,
                             (select * from t2 where t2.c<5) as tt
                          where t1.a=tt.c)) as t
    where t1.a=t.a  group by t.a;

--echo # with clause in the specification of a derived table
select *
  from t1, 
       (with t as (select a from t1 where b >= 'c') 
          select * from t2,t where t2.c=t.a) as tt
  where t1.b > 'f' and tt.a=t1.a; 
select *
  from t1, 
       (select * from t2,
                     (select a from t1 where b >= 'c') as t
          where t2.c=t.a) as tt
  where t1.b > 'f' and tt.a=t1.a; 
explain
select *
  from t1, 
       (with t as (select a from t1 where b >= 'c') 
          select * from t2,t where t2.c=t.a) as tt
  where t1.b > 'f' and tt.a=t1.a; 
explain
select *
  from t1, 
       (select * from t2,
                     (select a from t1 where b >= 'c') as t
          where t2.c=t.a) as tt
  where t1.b > 'f' and tt.a=t1.a; 

--echo # with claused in the specification of a view
create view v1 as 
with t as (select a from t1 where b >= 'c') 
  select * from t2,t where t2.c=t.a;
show create view v1;
select * from v1;
explain
select * from v1;

--echo # with claused in the specification of a materialized view
create view v2 as 
with t as (select a, count(*) from t1 where b >= 'c' group by a) 
  select * from t2,t where t2.c=t.a;
show create view v2;
select * from v2;
explain
select * from v2;

--echo # with clause in the specification of a view that whose definition
--echo # table alias for a with table
create view v3 as
with t(c) as (select a from t1 where b >= 'c')
select * from t r1 where r1.c=4;
show create view v3;
select * from v3;

--echo # with clause in the specification of a view that whose definition
--echo # two table aliases for for the same with table
create view v4(c,d) as
with t(c) as (select a from t1 where b >= 'c')
select * from t r1, t r2 where r1.c=r2.c and r2.c=4;
show create view v4;
select * from v4;
explain
select * from v4;

drop view v1,v2,v3,v4;


--echo # currently any views containing with clause are not updatable
create view v1(a) as 
with t as (select a from t1 where b >= 'c') 
  select t.a from t2,t where t2.c=t.a;
--error ER_NON_UPDATABLE_TABLE
update v1 set a=0 where a > 4;
drop view v1;


--echo # prepare of a query containing a definition of a with table t
prepare stmt1 from "
with t as (select a from t1 where b >= 'c') 
  select * from t2,t where t2.c=t.a;
";
execute stmt1;
execute stmt1;
deallocate prepare stmt1;

--echo # prepare of a query containing a definition of a materialized t
prepare stmt1 from "
with t as (select a, count(*) from t1 where b >= 'c' group by a) 
 select * from t2,t where t2.c=t.a;
";
execute stmt1;
execute stmt1;
deallocate prepare stmt1;

--echo # prepare of a query containing two references to with table t
prepare stmt1 from "
with t as (select * from t1 where b >= 'c')
  select * from t as r1, t as r2 where r1.a=r2.a;
";
execute stmt1;
execute stmt1;
deallocate prepare stmt1;

--ERROR ER_WITH_COL_WRONG_LIST
with t(f) as (select * from t1 where b >= 'c') 
  select * from t2,t where t2.c=t.f1;

--ERROR ER_DUP_FIELDNAME
with t(f1,f1) as (select * from t1 where b >= 'c') 
  select * from t2,t where t2.c=t.f1;

--ERROR ER_DUP_QUERY_NAME
with t as (select * from t2 where c>3),
     t as (select a from t1 where a>2)
 select * from t,t1 where t1.a=t.c;

--ERROR ER_NO_SUCH_TABLE
with t as (select a from s where a<5),
     s as (select a from t1 where b>='d')
  select * from t,s where t.a=s.a;

with recursive
     t as (select a from s where a<5),
     s as (select a from t1 where b>='d')
  select * from t,s where t.a=s.a;

--ERROR ER_RECURSIVE_WITHOUT_ANCHORS
with recursive t as (select * from s where a>2),
               s as (select a from t1,r where t1.a>r.c), 
               r as (select c from t,t2 where t.a=t2.c) 
  select * from r where r.c<7;

--ERROR ER_RECURSIVE_WITHOUT_ANCHORS
with recursive
     t as (select * from s where a>2),
     s as (select a from t1,r where t1.a>r.c), 
     r as (select c from t,t2 where t.a=t2.c) 
  select * from r where r.c<7;

--ERROR ER_RECURSIVE_WITHOUT_ANCHORS
with recursive
     t as (select * from t1
             where a in (select c from s where b<='ccc') and  b>'b'),
     s as (select * from t1,t2
             where t1.a=t2.c and t1.c in (select a from t where a<5))
 select * from s where s.b>'aaa';

--ERROR ER_RECURSIVE_WITHOUT_ANCHORS
with recursive 
  t as (select * from t1 where b>'aaa' and b <='d') 
  select t.b from t,t2
    where t.a=t2.c and
          t2.c in (with recursive
                   s as (select t1.a from s,t1 where t1.a=s.a and t1.b<'c')
                   select * from s);
--echo #erroneous definition of unreferenced with table t
--ERROR ER_BAD_FIELD_ERROR
with t as (select count(*) from t1 where d>='f' group by a)
  select t1.b from t2,t1 where t1.a = t2.c;

with t as (select count(*) from t1 where b>='f' group by a)
  select t1.b from t2,t1 where t1.a = t2.c;

--echo #erroneous definition of s referring to unreferenced t
--ERROR ER_BAD_FIELD_ERROR
with t(d) as (select count(*) from t1 where b<='ccc' group by b),
     s as (select * from t1 where a in (select t2.d from t2,t where t2.c=t.d))
  select t1.b from t1,t2 where t1.a=t2.c;
--ERROR ER_BAD_FIELD_ERROR
with t(d) as (select count(*) from t1 where b<='ccc' group by b),
     s as (select * from t1 where a in (select t2.c from t2,t where t2.c=t.c))
  select t1.b from t1,t2 where t1.a=t2.c;

with t(d) as (select count(*) from t1 where b<='ccc' group by b),
     s as (select * from t1 where a in (select t2.c from t2,t where t2.c=t.d))
  select t1.b from t1,t2 where t1.a=t2.c;

--echo #erroneous definition of unreferenced with table t
--ERROR ER_WITH_COL_WRONG_LIST
with t(f) as (select * from t1 where b >= 'c') 
  select t1.b from t2,t1 where t1.a = t2.c;

--echo #erroneous definition of unreferenced with table t
--ERROR ER_DUP_FIELDNAME
with t(f1,f1) as (select * from t1 where b >= 'c') 
  select t1.b from t2,t1 where t1.a = t2.c;

--echo # explain for query with unreferenced with table

explain 
with t as (select a from t1 where b >= 'c') 
  select t1.b from t2,t1 where t1.a = t2.c;

explain 
with t as (select a, count(*) from t1 where b >= 'c' group by a)
  select t1.b from t2,t1 where t1.a = t2.c;

--echo # too many with elements in with clause
let $m= 65;
let $i= $m;
dec $i;
let $q= with s$m as (select * from t1);
while ($i)
{
  let $q= $q, s$i as (select * from t1) ;
  dec $i;
 }
let $q= $q select * from s$m;
--ERROR ER_TOO_MANY_DEFINITIONS_IN_WITH_CLAUSE
eval $q;

drop table t1,t2;

--echo #
--echo # Bug mdev-9937: View used in the specification of with table 
--echo #                refers to the base table with the same name 
--echo #

create table t1 (a int);
insert into t1 values (20), (30), (10);
create view v1 as select * from t1 where a > 10;

with t1 as (select * from v1) select * from t1;

drop view v1;
drop table t1;

--echo #
--echo # Bug mdev-10058: Invalid derived table with WITH clause  
--echo #                 

CREATE TABLE t1 (a INT);
CREATE TABLE t2 (a INT);
CREATE TABLE t3 (a INT);
INSERT INTO t1 VALUES (1),(2),(3);
INSERT INTO t2 VALUES (1),(2),(3);
INSERT INTO t3 VALUES (1),(2),(3);

--ERROR ER_PARSE_ERROR
SELECT * FROM (WITH a AS (SELECT * FROM t1) (t2 NATURAL JOIN t3));

SELECT * FROM (WITH a AS (SELECT * FROM t1) SELECT * FROM t2 NATURAL JOIN t3) AS d1;

DROP TABLE t1,t2,t3;

--echo #
--echo # Bug mdev-10344: the WITH clause of the query refers to a view that uses 
--echo #     a base table with the same name as a  CTE table from the clause 
--echo #


create table ten(a int primary key);
insert into ten values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
 
create table one_k(a int primary key);
insert into one_k select A.a + B.a* 10 + C.a * 100 from ten A, ten B, ten C;
 
create view v1 as select * from ten;

select * from v1;

drop view v1;
drop table ten, one_k;

--echo #
--echo # MDEV-10057 : Crash with EXPLAIN + WITH + constant query
--echo #
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (1),(2),(3);
SELECT * FROM (WITH a AS (SELECT * FROM t1) SELECT 1) AS t1;
EXPLAIN SELECT * FROM (WITH a AS (SELECT * FROM t1) SELECT 1) AS t1;
DROP TABLE t1;

--echo #
--echo # MDEV-10058: Suspicious EXPLAIN output for a derived table + WITH + joined table	
--echo #
CREATE TABLE t1 (a INT);
CREATE TABLE t2 (a INT);
CREATE TABLE t3 (a INT);
INSERT INTO t1 VALUES (1),(2),(3);
INSERT INTO t2 VALUES (1),(2),(3);
INSERT INTO t3 VALUES (1),(2),(3);
--error ER_PARSE_ERROR
EXPLAIN SELECT * FROM (WITH a AS (SELECT * FROM t1) (t2 NATURAL JOIN t3));
explain SELECT * FROM (WITH a AS (SELECT * FROM t1) SELECT * FROM t2 NATURAL JOIN t3) AS d1;
DROP TABLE t1,t2,t3;

--echo #
--echo # MDEV-10729: Server crashes in st_select_lex::set_explain_type
--echo #
CREATE TABLE t1 (i1 INT, KEY(i1)) ENGINE=MyISAM;
INSERT INTO t1 VALUES (4),(8);
                        
CREATE TABLE t2 (a2 INT, b2 INT, KEY(b2)) ENGINE=MyISAM;
INSERT INTO t2 VALUES (8,7);
            
CREATE TABLE t3 (i3 INT) ENGINE=MyISAM;
INSERT INTO t3 VALUES (2),(6);
 
SELECT * FROM t1, t2 WHERE a2 = i1 and b2 >= i1 AND i1 IN ( SELECT i3 FROM t3 )
UNION
SELECT * FROM t1, t2 WHERE a2 = i1 and b2 >= i1 AND i1 IN ( SELECT i3 FROM t3 )
;
DROP TABLE t1,t2,t3;

--echo #
--echo # MDEV-10923: mergeable CTE used twice in the query
--echo #

create table employees (
  name varchar(32),
  dept varchar(32),
  country varchar(8)
);
 
insert into employees 
values 
('Sergei Golubchik', 'Development', 'DE'),
('Claudio Nanni', 'Support', 'ES'),
('Sergei Petrunia', 'Development', 'RU');

with eng as 
(
   select * from employees
   where dept in ('Development','Support')
),
eu_eng  as 
(
  select * from eng where country IN ('DE','ES','RU')
)
select * from eu_eng T1 
where 
  not exists (select 1 from eu_eng T2 
              where T2.country=T1.country
              and T2.name <> T1.name);

drop table employees;

--echo #
--echo # MDEV-11818: EXPLAIN EXTENDED for a query with optimized away CTE table
--echo #

CREATE TABLE t1 (i INT, c VARCHAR(3));
INSERT INTO t1 VALUES (1,'foo');

EXPLAIN EXTENDED
WITH cte AS ( SELECT * FROM t1 ) SELECT i FROM cte;

DROP TABLE t1;

--echo #
--echo # MDEV-12185: view defintion contains WITH clause with 
--echo #             several specifications of CTE
--echo #

with
  alias1 as (select 1 as one),
  alias2 as (select 2 as two)
select one, two from alias1, alias2;

create view v1 as 
with
  alias1 as (select 1 as one),
  alias2 as (select 2 as two)
select one, two from alias1, alias2;

select * from v1;
show create view v1;

drop view v1;

--echo #
--echo # MDEV-12440: the same CTE table is used twice
--echo #

create table t1 (a int, b  varchar(32));
insert into t1 values
  (4,'aaaa' ), (7,'bb'), (1,'ccc'), (4,'dd');  

--echo # cte2 is used in the main query and in the spec for ct3
with
cte1 as (select * from t1 where  b >= 'c'),
cte2 as (select * from cte1 where a < 7),
cte3 as (select * from cte2 where a > 1)
select * from cte2, cte3 where cte2.a = cte3.a;

--echo # cte2 is used twice in the spec for ct3
with
cte1 as (select * from t1 where  b >= 'b'),
cte2 as (select * from cte1 where b > 'c'),
cte3 as (select * from cte2 where a > 1 union select * from cte2 where a > 1)
select * from cte3;

drop table t1;

--echo #
--echo # MDEV-12558: CTE with the same name as temporary table
--echo #

CREATE TABLE t ENGINE=MyISAM AS SELECT 1 AS i;
CREATE TEMPORARY TABLE cte ENGINE=MyISAM AS SELECT 2 AS f;

WITH cte AS ( SELECT i FROM t ) SELECT * FROM cte;
WITH cte AS ( SELECT i FROM t GROUP BY i) SELECT * FROM cte;

SELECT * FROM cte;

DROP TABLE cte;
DROP TABLE t;

--echo #
--echo # MDEV-13107: SHOW TABLE STATUS, SHOW CREATE VIEW 
--echo #             for CTEs that use derived tables
--echo #

create table t1(a int) engine=myisam;
insert into t1 values (3), (1), (2);
create table t2 (b int) engine=myisam;
insert into t2 values (2), (10);

create view v1 as
with t as (select s.a from (select t1.a from t1) s),
     r as(select t.a from t2, t where t2.b=t.a)
 select a from r;

create view v2 as
with t as (select s.a from (select t1.a from t1) s),
     r as(select t.a from t2, t where t2.b=t.a)
 select a from t1;

--disable_result_log
show table status;
--enable_result_log

show create view v1;
show create view v2;

select * from v1;
select * from v2;

prepare stmt1 from "select * from v1";
execute stmt1;
execute stmt1;
prepare stmt2 from "select * from v2";
execute stmt2;
execute stmt2;

deallocate prepare stmt1;
deallocate prepare stmt2;

drop view v1,v2;
drop table t1,t2;

--echo #
--echo # MDEV-13796: UNION of two materialized CTEs
--echo #

CREATE TABLE t1 (id int, k int);
CREATE TABLE t2 (id int);
INSERT INTO t1 VALUES (3,5), (1,7), (4,3);
INSERT INTO t2 VALUES (4), (3), (2);

let $q=
WITH d1 AS (SELECT SUM(k) FROM t1, t2 as t2 WHERE t1.id = t2.id),
     d2 AS (SELECT SUM(k) FROM t1, t2 as t2 WHERE t1.id = t2.id)
SELECT * FROM d1 UNION  SELECT * FROM d2;

eval $q;
eval explain $q;

DROP TABLE t1,t2;

--echo #
--echo # MDEV-13780: tower of embedding CTEs with multiple usage of them
--echo #

create table t1 (a int);
insert into t1 values (3), (2), (4), (7), (1), (2), (5);

let $q=
with cte_e as
(
  with cte_o as
  (
    with cte_i as (select * from t1 where a < 7)
    select * from cte_i where a > 1
  )
  select * from cte_o as cto_o1 where a < 3
  union
  select * from cte_o as cto_o2 where a > 4
)
select * from cte_e as cte_e1 where a > 1
union
select * from cte_e as cte_e2;

eval $q;
eval explain extended $q;

drop table t1;

--echo #
--echo # MDEV-13753: embedded CTE in a VIEW created in prepared statement
--echo #

SET @sql_query = "
  CREATE OR REPLACE VIEW cte_test AS
   WITH  cte1  AS ( SELECT 1 as a from dual )
    ,    cte2  AS ( SELECT * FROM cte1 )
    SELECT * FROM cte2;
";
PREPARE stmt FROM @sql_query;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;

SHOW CREATE VIEW cte_test;
SELECT * FROM cte_test;

DROP VIEW cte_test;

--echo #
--echo # mdev-14755 : PS for query using CTE in select with subquery
--echo #

create table t1 (a int);
insert into t1 values
  (7), (2), (8), (1), (3), (2), (7), (5), (4), (7), (9), (8);

let $q1=
with cte as
(select a from t1 where a between 4 and 7 group by a)
(select a from cte where exists( select a from t1 where cte.a=t1.a ))
union
(select a from t1 where a < 2);

eval $q1;
eval prepare stmt from "$q1";
execute stmt;
execute stmt;
deallocate prepare stmt;

let $q2=
with cte as
(select a from t1 where a between 4 and 7 group by a)
(select a from t1 where a < 2)
union
(select a from cte where exists( select a from t1 where cte.a=t1.a ));

eval $q2;
eval prepare stmt from "$q2";
execute stmt;
execute stmt;
deallocate prepare stmt;

let $q3=
with cte as
(select a from t1 where a between 4 and 7)
(select a from t1 where a < 2)
union
(select a from cte where exists( select a from t1 where cte.a=t1.a ));

eval $q3;
eval prepare stmt from "$q3";
execute stmt;
execute stmt;
deallocate prepare stmt;

let $q4=
with cte as
(select a from t1 where a between 4 and 7)
(select a from cte
   where exists( select a from t1 where t1.a < 2 and cte.a=t1.a ))
union
(select a from cte where exists( select a from t1 where cte.a=t1.a ));

eval $q4;
eval prepare stmt from "$q4";
execute stmt;
execute stmt;
deallocate prepare stmt;

drop table t1;

--echo #
--echo # MDEV-14852: CTE using temporary table in query
--echo #             with two references to the CTE
--echo #

create temporary table t1 (i int);
insert into t1 values (5),(4),(1),(2),(3);

with
c1 as (select i from t1),
c2 as (select i from c1 where c1.i=2)
select i from c1 where i > 3 union  select i from c2;

drop table t1;

create table t1 (term char(10));
create temporary table t2 (term char(10));

insert into t1 values ('TERM01'),('TERM02'),('TERM03');
insert into t2 values ('TERM02'),('TERM03'),('TERM04');

with c1 as (select * from t1), c2 as (select * from t2)
(select * from c1 left outer join c2 on c1.term = c2.term)
union all
(select * from c1 right outer join c2 on c1.term = c2.term
  where c1.term is null);

drop table t1,t2;

--echo #
--echo # MDEV-14969: view using subquery with attached CTE
--echo #

create table region (
  r_regionkey int,
  r_name char(25),
  primary key (r_regionkey)
);
insert into region values
(0,'AFRICA'), (1,'AMERICA'), (2,'ASIA'), (3,'EUROPE'), (4,'MIDDLE EAST');

create table nation (
  n_nationkey int,
  n_name char(25),
  n_regionkey int,
  primary key (n_nationkey),
  key i_n_regionkey (n_regionkey)
);
insert into nation values
(0,'ALGERIA',0), (1,'ARGENTINA',1), (2,'BRAZIL',1), (3,'CANADA',1),
(4,'EGYPT',4), (5,'ETHIOPIA',0), (6,'FRANCE',3), (7,'GERMANY',3),
(8,'INDIA',2), (9,'INDONESIA',2), (10,'IRAN',4), (11,'IRAQ',4),
(12,'JAPAN',2), (13,'JORDAN',4), (14,'KENYA',0), (15,'MOROCCO',0),
(16,'MOZAMBIQUE',0), (17,'PERU',1), (18,'CHINA',2), (19,'ROMANIA',3),
(20,'SAUDI ARABIA',4), (21,'VIETNAM',2), (22,'RUSSIA',3),
(23,'UNITED KINGDOM',3), (24,'UNITED STATES',1);

select * from nation n ,region r
  where n.n_regionkey = r.r_regionkey and
        r.r_regionkey in
        (with t as (select * from region where r_regionkey <= 3 )
           select r_regionkey from t where r_name <> "ASIA");

create view v as
select * from nation n ,region r
  where n.n_regionkey = r.r_regionkey and
        r.r_regionkey in
        (with t as (select * from region where r_regionkey <= 3)
           select r_regionkey from t where r_name <> "ASIA");

show create view v;
select * from v;

drop view v;
drop table region, nation;

--echo #
--echo # MDEV-15120: cte name used with database name
--echo #

--error ER_NO_SUCH_TABLE
WITH cte AS (SELECT 1 AS a) SELECT test.cte.a FROM test.cte;

CREATE DATABASE db1;
USE db1;

--error ER_NO_SUCH_TABLE
WITH cte AS (SELECT 1 AS a) SELECT db1.cte.a FROM db1.cte;

DROP DATABASE db1;
USE test;

--echo #
--echo # MDEV-15119: CTE c2 specified after CTE c1 and is used in
--echo #             CTE c3 that is embedded into the spec of c1
--echo #

CREATE TABLE t1 (i int);
INSERT INTO t1 VALUES (1),(2),(3);

--error ER_NO_SUCH_TABLE
WITH c1 AS (WITH c3 AS (SELECT * FROM c2) SELECT * FROM c3),
     c2 AS (SELECT * FROM t1)
SELECT * FROM c1;

WITH RECURSIVE c1 AS (WITH c3 AS (SELECT * FROM c2) SELECT * FROM c3),
     c2 AS (SELECT * FROM t1)
SELECT * FROM c1;

DROP TABLE t1;

--echo #
--echo # MDEV-14297: Lost name of a explicitly named CTE column used in
--echo #             the non-recursive CTE via prepared statement
--echo #

CREATE TABLE t1 (i int);
INSERT INTO t1 VALUES (1),(2),(3);

PREPARE stmt FROM "WITH cte(a) AS (SELECT 1) SELECT * FROM cte";
EXECUTE stmt;
DEALLOCATE PREPARE stmt;

PREPARE stmt FROM "CREATE VIEW v1 AS WITH cte(a) AS (SELECT 1) SELECT * FROM cte";
EXECUTE stmt;
SELECT * FROM v1;
DEALLOCATE PREPARE stmt;

PREPARE stmt FROM "CREATE VIEW v2 AS WITH cte(a) AS (SELECT * FROM t1) SELECT * FROM cte";
EXECUTE stmt;
SELECT * FROM v2;
DEALLOCATE PREPARE stmt;

DROP TABLE t1;
DROP VIEW v1,v2;

--echo #
--echo # MDEV-15478: Lost name of a explicitly named CTE column used in
--echo #             the non-recursive CTE defined with UNION
--echo #

CREATE TABLE t1 (x int, y int);
INSERT INTO t1 VALUES (1,2),(2,7),(3,3);

WITH cte(a) AS (SELECT 1 UNION SELECT 2) SELECT * FROM cte;

WITH cte(a) AS (SELECT 1 UNION SELECT 2) SELECT a FROM cte;

WITH cte(a) AS (SELECT 1 UNION ALL SELECT 1) SELECT a FROM cte;

WITH cte(a) AS (SELECT x from t1 UNION SELECT 4) SELECT a FROM cte;

WITH cte(a) AS (SELECT 4 UNION SELECT x FROM t1 UNION SELECT 5)
SELECT a FROM cte;

WITH cte(a,b) AS (SELECT 4,5 UNION SELECT 4,3) SELECT a,b FROM cte;

DROP TABLE t1;

--echo #
--echo # MDEV-16353: unreferenced CTE specified by query with UNION
--echo #

with cte as
  (select 1 union select 2 union select 3)
select 1 as f;

create table t1 (a int);
insert into t1 values (2), (1), (7), (1), (4);

with cte as
  (select * from t1 where a < 2 union select * from t1 where a > 5)
select 2 as f;

drop table t1;

--echo #
--echo # MDEV-16473: query with CTE when no database is set
--echo #

create database db_mdev_16473;
use db_mdev_16473;
drop database db_mdev_16473;

--echo # Now no default database is set
select database();

with cte as (select 1 as a) select * from cte;

create database db_mdev_16473;
create table db_mdev_16473.t1 (a int);
insert into db_mdev_16473.t1 values (2), (7), (3), (1);
with cte as (select * from db_mdev_16473.t1) select * from cte;

--error ER_NO_DB_ERROR
with cte as (select * from db_mdev_16473.t1)
select * from cte, t1 as t where cte.a=t.a;
with cte as (select * from db_mdev_16473.t1)
select * from cte, db_mdev_16473.t1 as t where cte.a=t.a;

drop database db_mdev_16473;

create database `*` ;
create table `*`.t1 (a int);
insert into `*`.t1 values (2), (7), (3), (1);
use `*`;
select * from t1;
drop database `*`;

use test;