--source include/have_innodb.inc

--echo #
--echo # MDEV-16917: do not use splitting for derived with join cache
--echo #

CREATE TABLE t1 (
  n1 int(10) NOT NULL,
  n2 int(10) NOT NULL,
  c1 char(1) NOT NULL,
  KEY c1 (c1),
  KEY n1_c1_n2 (n1,c1,n2)
) ENGINE=InnoDB;
INSERT INTO t1 VALUES (0, 2, 'a'), (1, 3, 'a');

ANALYZE TABLE t1;

Let $q=
SELECT t1.n1 FROM t1, (SELECT n1, n2 FROM t1 WHERE c1 = 'a' GROUP BY n1) as t
  WHERE t.n1 = t1.n1 AND t.n2 = t1.n2 AND c1 = 'a' GROUP BY n1;

eval EXPLAIN $q;
eval $q;

DROP TABLE t1;

--echo #
--echo # MDEV-17211: splittable materialized derived joining 3 tables with
--echo #             GROUP BY list containing fields from 2 of them
--echo #

CREATE TABLE t1 (
  id1 int, i1 int, id2 int,
  PRIMARY KEY (id1), KEY (i1), KEY (id2)
) ENGINE=InnoDB;
INSERT INTO t1 VALUES (1,1,1);

CREATE TABLE t2 (id2 int, i2 int) ENGINE=InnoDB;
INSERT INTO t2  VALUES (1, 1);

CREATE TABLE t3 (id3 int, i3 int, PRIMARY KEY (id3)) ENGINE=InnoDB;
INSERT INTO t3 VALUES (1,1);

let $q=
SELECT id3
  FROM (SELECT t3.id3, t2.i2, t1.id2  FROM t3,t1,t2
          WHERE t3.i3=t1.id1 AND t2.id2=t1.id2
            GROUP BY t3.id3, t1.id2) AS t,
        t2
    WHERE t2.id2=t.id2;

eval EXPLAIN $q;
eval $q;

DROP TABLE t1,t2,t3;

--echo #
--echo # Bug mdev-17381: equi-join of derived table with join_cache_level=4
--echo #

CREATE TABLE t1 (
  id int NOT NULL,
  amount decimal DEFAULT NULL,
PRIMARY KEY (id)
) ENGINE=INNODB;

CREATE TABLE t2 (
  id int NOT NULL,
  name varchar(50) DEFAULT NULL,
PRIMARY KEY (id)
) ENGINE=INNODB;

INSERT INTO t1 VALUES
(1, 10.0000), (2, 20.0000), (3, 30.0000), (4, 40.0000),
(5, NULL), (6, NULL), (7, 70.0000), (8, 80.0000);

INSERT INTO t2 VALUES
(1,'A'), (2,'B'), (3,'C'), (4,'D'), (5, NULL), (6, NULL),
(7,'E'), (8,'F'), (9,'G'), (10,'H'), (11, NULL), (12, NULL);

set join_cache_level=4;

let $q=
SELECT t2.id,t2.name,t.total_amt
  FROM  t2
        LEFT JOIN
        (SELECT id, sum(amount) total_amt FROM t1 GROUP BY id) AS t
        ON t2.id=t.id
  WHERE t2.id < 3;

eval $q;
eval EXPLAIN $q;

set join_cache_level=default;

DROP TABLE t1,t2;