SET @save_stats_persistent=@@GLOBAL.innodb_stats_persistent;
SET GLOBAL innodb_stats_persistent=OFF;
#
# MDEV-6402: Optimizer doesn't choose best execution plan when composite key is used
#
create table t0(a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1(a int);
insert into t1 select A.a + B.a* 10 + C.a * 100 from t0 A, t0 B, t0 C;
CREATE TABLE t2 (
pk1 int(11) NOT NULL,
pk2 int(11) NOT NULL,
fd5 bigint(20) DEFAULT NULL,
filler1 char(200),
filler2 char(200),
PRIMARY KEY (pk1,pk2),
UNIQUE KEY ux_pk1_fd5 (pk1,fd5)
) ENGINE=InnoDB;
insert into t2 
select 
round(log(2,t1.a+1)),
t1.a,
t1.a,
REPEAT('filler-data-', 10),
REPEAT('filler-data-', 10)
from 
t1;
select pk1, count(*) from t2 group by pk1;
pk1	count(*)
0	1
1	1
2	3
3	6
4	11
5	23
6	45
7	91
8	181
9	362
10	276
# The following should use range(ux_pk1_fd5), two key parts (key_len=5+8=13)
EXPLAIN SELECT * FROM t2 USE INDEX(ux_pk1_fd5) WHERE pk1=9 AND fd5 < 500 ORDER BY fd5 DESC LIMIT 10;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t2	range	ux_pk1_fd5	ux_pk1_fd5	13	NULL	138	Using where
# This also must use range, not ref. key_len must be 13
EXPLAIN SELECT * FROM t2                       WHERE pk1=9 AND fd5 < 500 ORDER BY fd5 DESC LIMIT 10;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t2	range	PRIMARY,ux_pk1_fd5	ux_pk1_fd5	13	NULL	138	Using where
drop table t0,t1, t2;
#
# MDEV-6814: Server crashes in calculate_key_len on query with ORDER BY
#
CREATE TABLE t1 (f1 INT, f2 INT, f3 INT, KEY(f2),KEY(f2,f1)) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1,5,0),(2,6,0);
SELECT * FROM t1 WHERE f1 < 3 AND f2 IS NULL ORDER BY f1;
f1	f2	f3
DROP TABLE t1;
#
# MDEV-6796: Unable to skip filesort when using implicit extended key
#
CREATE TABLE t1 (
pk1 int(11) NOT NULL,
pk2 varchar(64) NOT NULL,
col1 varchar(16) DEFAULT NULL,
PRIMARY KEY (pk1,pk2),
KEY key1 (pk1,col1)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
CREATE TABLE t2 (
pk1 int(11) NOT NULL,
pk2 varchar(64) NOT NULL,
col1 varchar(16) DEFAULT NULL,
PRIMARY KEY (pk1,pk2),
KEY key1 (pk1,col1,pk2)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
INSERT INTO `t1` VALUES 
(12321321,'a8f5f167f44f4964e6c998dee827110c','video'),
(12321321,'d77a17a3659ffa60c54e0ea17b6c6d16','video'),
(12321321,'wwafdsafdsafads','video'),
(12321321,'696aa249f0738e8181957dd57c2d7d0b','video-2014-09-23'),
(12321321,'802f9f29584b486f356693e3aa4ef0af','video=sdsd'),
(12321321,'2f94543ff74aab82e9a058b4e8316d75','video=sdsdsds'),
(12321321,'c1316b9df0d203fd1b9035308de52a0a','video=sdsdsdsdsd');
insert into t2 select * from t1;
# this must not use filesort:
explain SELECT pk2
FROM t1 USE INDEX(key1)
WHERE pk1 = 123
AND col1 = 'video'
ORDER BY pk2 DESC LIMIT 21;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	key1	key1	55	const,const	1	Using where; Using index
# this must not use filesort, either:
explain SELECT pk2
FROM t2 USE INDEX(key1)
WHERE pk1 = 123 AND col1 = 'video'
ORDER BY pk2 DESC LIMIT 21;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t2	ref	key1	key1	55	const,const	1	Using where; Using index
drop table t1, t2;
SET GLOBAL innodb_stats_persistent=@save_stats_persistent;