set @innodb_stats_persistent_save= @@innodb_stats_persistent;
set @innodb_stats_persistent_sample_pages_save=
@@innodb_stats_persistent_sample_pages;
set global innodb_stats_persistent= 1;
set global innodb_stats_persistent_sample_pages=100;
drop view if exists v1;
drop table if exists t1,t4;
create table t4 (
pk_col int auto_increment primary key, a1 char(64), a2 char(64), b char(16), c char(16) not null, d char(16), dummy char(64) default ' '
) engine=innodb;
insert into t4 (a1, a2, b, c, d) values
('a','a','a','a111','xy1'),('a','a','a','b111','xy2'),('a','a','a','c111','xy3'),('a','a','a','d111','xy4'),
('a','a','b','e112','xy1'),('a','a','b','f112','xy2'),('a','a','b','g112','xy3'),('a','a','b','h112','xy4'),
('a','b','a','i121','xy1'),('a','b','a','j121','xy2'),('a','b','a','k121','xy3'),('a','b','a','l121','xy4'),
('a','b','b','m122','xy1'),('a','b','b','n122','xy2'),('a','b','b','o122','xy3'),('a','b','b','p122','xy4'),
('b','a','a','a211','xy1'),('b','a','a','b211','xy2'),('b','a','a','c211','xy3'),('b','a','a','d211','xy4'),
('b','a','b','e212','xy1'),('b','a','b','f212','xy2'),('b','a','b','g212','xy3'),('b','a','b','h212','xy4'),
('b','b','a','i221','xy1'),('b','b','a','j221','xy2'),('b','b','a','k221','xy3'),('b','b','a','l221','xy4'),
('b','b','b','m222','xy1'),('b','b','b','n222','xy2'),('b','b','b','o222','xy3'),('b','b','b','p222','xy4'),
('c','a','a','a311','xy1'),('c','a','a','b311','xy2'),('c','a','a','c311','xy3'),('c','a','a','d311','xy4'),
('c','a','b','e312','xy1'),('c','a','b','f312','xy2'),('c','a','b','g312','xy3'),('c','a','b','h312','xy4'),
('c','b','a','i321','xy1'),('c','b','a','j321','xy2'),('c','b','a','k321','xy3'),('c','b','a','l321','xy4'),
('c','b','b','m322','xy1'),('c','b','b','n322','xy2'),('c','b','b','o322','xy3'),('c','b','b','p322','xy4'),
('d','a','a','a411','xy1'),('d','a','a','b411','xy2'),('d','a','a','c411','xy3'),('d','a','a','d411','xy4'),
('d','a','b','e412','xy1'),('d','a','b','f412','xy2'),('d','a','b','g412','xy3'),('d','a','b','h412','xy4'),
('d','b','a','i421','xy1'),('d','b','a','j421','xy2'),('d','b','a','k421','xy3'),('d','b','a','l421','xy4'),
('d','b','b','m422','xy1'),('d','b','b','n422','xy2'),('d','b','b','o422','xy3'),('d','b','b','p422','xy4'),
('a','a','a','a111','xy1'),('a','a','a','b111','xy2'),('a','a','a','c111','xy3'),('a','a','a','d111','xy4'),
('a','a','b','e112','xy1'),('a','a','b','f112','xy2'),('a','a','b','g112','xy3'),('a','a','b','h112','xy4'),
('a','b','a','i121','xy1'),('a','b','a','j121','xy2'),('a','b','a','k121','xy3'),('a','b','a','l121','xy4'),
('a','b','b','m122','xy1'),('a','b','b','n122','xy2'),('a','b','b','o122','xy3'),('a','b','b','p122','xy4'),
('b','a','a','a211','xy1'),('b','a','a','b211','xy2'),('b','a','a','c211','xy3'),('b','a','a','d211','xy4'),
('b','a','b','e212','xy1'),('b','a','b','f212','xy2'),('b','a','b','g212','xy3'),('b','a','b','h212','xy4'),
('b','b','a','i221','xy1'),('b','b','a','j221','xy2'),('b','b','a','k221','xy3'),('b','b','a','l221','xy4'),
('b','b','b','m222','xy1'),('b','b','b','n222','xy2'),('b','b','b','o222','xy3'),('b','b','b','p222','xy4'),
('c','a','a','a311','xy1'),('c','a','a','b311','xy2'),('c','a','a','c311','xy3'),('c','a','a','d311','xy4'),
('c','a','b','e312','xy1'),('c','a','b','f312','xy2'),('c','a','b','g312','xy3'),('c','a','b','h312','xy4'),
('c','b','a','i321','xy1'),('c','b','a','j321','xy2'),('c','b','a','k321','xy3'),('c','b','a','l321','xy4'),
('c','b','b','m322','xy1'),('c','b','b','n322','xy2'),('c','b','b','o322','xy3'),('c','b','b','p322','xy4'),
('d','a','a','a411','xy1'),('d','a','a','b411','xy2'),('d','a','a','c411','xy3'),('d','a','a','d411','xy4'),
('d','a','b','e412','xy1'),('d','a','b','f412','xy2'),('d','a','b','g412','xy3'),('d','a','b','h412','xy4'),
('d','b','a','i421','xy1'),('d','b','a','j421','xy2'),('d','b','a','k421','xy3'),('d','b','a','l421','xy4'),
('d','b','b','m422','xy1'),('d','b','b','n422','xy2'),('d','b','b','o422','xy3'),('d','b','b','p422','xy4');
create index idx12672_0 on t4 (a1);
create index idx12672_1 on t4 (a1,a2,b,c);
create index idx12672_2 on t4 (a1,a2,b);
analyze table t4;
Table	Op	Msg_type	Msg_text
test.t4	analyze	status	Engine-independent statistics collected
test.t4	analyze	status	OK
select distinct a1 from t4 where pk_col not in (1,2,3,4);
a1
a
b
c
d
drop table t4;
create table t1 (
a varchar(30), b varchar(30), primary key(a), key(b)
) engine=innodb;
select distinct a from t1;
a
drop table t1;
create table t1(a int, key(a)) engine=innodb;
insert into t1 values(1);
select a, count(a) from t1 group by a with rollup;
a	count(a)
1	1
NULL	1
drop table t1;
create table t1 (f1 int, f2 char(1), primary key(f1,f2)) engine=innodb;
insert into t1 values ( 1,"e"),(2,"a"),( 3,"c"),(4,"d");
alter table t1 drop primary key, add primary key (f2, f1);
explain select distinct f1 a, f1 b from t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	PRIMARY	5	NULL	4	Using index; Using temporary
explain select distinct f1, f2 from t1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	PRIMARY	5	NULL	4	Using index
drop table t1;
create table t1(pk int primary key) engine=innodb;
create view v1 as select pk from t1 where pk < 20;
insert into t1 values (1), (2), (3), (4);
select distinct pk from v1;
pk
1
2
3
4
insert into t1 values (5), (6), (7);
select distinct pk from v1;
pk
1
2
3
4
5
6
7
drop view v1;
drop table t1;
End of 5.1 tests
#
# Bug#12540545 61101: ASSERTION FAILURE IN THREAD 1256741184 IN
# FILE /BUILDDIR/BUILD/BUILD/MYSQ
#
CREATE TABLE t1 (a CHAR(1), b CHAR(1), PRIMARY KEY (a,b)) ENGINE=InnoDB;
INSERT INTO t1 VALUES ('a', 'b'), ('c', 'd');
EXPLAIN SELECT COUNT(DISTINCT a) FROM t1 WHERE b = 'b';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	PRIMARY	2	NULL	2	Using where; Using index
SELECT COUNT(DISTINCT a) FROM t1 WHERE b = 'b';
COUNT(DISTINCT a)
1
DROP TABLE t1;
CREATE TABLE t1 (a CHAR(1) NOT NULL, b CHAR(1) NOT NULL, UNIQUE KEY (a,b))
ENGINE=InnoDB;
INSERT INTO t1 VALUES ('a', 'b'), ('c', 'd');
EXPLAIN SELECT COUNT(DISTINCT a) FROM t1 WHERE b = 'b';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	a	2	NULL	2	Using where; Using index
SELECT COUNT(DISTINCT a) FROM t1 WHERE b = 'b';
COUNT(DISTINCT a)
1
DROP TABLE t1;
End of 5.5 tests
#
# Bug#17909656 - WRONG RESULTS FOR A SIMPLE QUERY WITH GROUP BY
#
CREATE TABLE t0 (
i1 INTEGER NOT NULL
);
INSERT INTO t0 VALUES (1),(2),(3),(4),(5),(6),(7),(8),(9),(10),
(11),(12),(13),(14),(15),(16),(17),(18),(19),(20),
(21),(22),(23),(24),(25),(26),(27),(28),(29),(30);
CREATE TABLE t1 (
c1 CHAR(1) NOT NULL,
i1 INTEGER NOT NULL,
i2 INTEGER NOT NULL,
UNIQUE KEY k1 (c1,i2)
) ENGINE=InnoDB;
INSERT INTO t1 SELECT 'A',i1,i1 FROM t0;
INSERT INTO t1 SELECT 'B',i1,i1 FROM t0;
INSERT INTO t1 SELECT 'C',i1,i1 FROM t0;
INSERT INTO t1 SELECT 'D',i1,i1 FROM t0;
INSERT INTO t1 SELECT 'E',i1,i1 FROM t0;
INSERT INTO t1 SELECT 'F',i1,i1 FROM t0;
CREATE TABLE t2 (
c1 CHAR(1) NOT NULL,
i1 INTEGER NOT NULL,
i2 INTEGER NOT NULL,
UNIQUE KEY k2 (c1,i1,i2)
) ENGINE=InnoDB;
INSERT INTO t2 SELECT 'A',i1,i1 FROM t0;
INSERT INTO t2 SELECT 'B',i1,i1 FROM t0;
INSERT INTO t2 SELECT 'C',i1,i1 FROM t0;
INSERT INTO t2 SELECT 'D',i1,i1 FROM t0;
INSERT INTO t2 SELECT 'E',i1,i1 FROM t0;
INSERT INTO t2 SELECT 'F',i1,i1 FROM t0;
ANALYZE TABLE t1;
ANALYZE TABLE t2;
EXPLAIN SELECT c1, max(i2) FROM t1 WHERE (c1 = 'C' AND i2 = 17) OR ( c1 = 'F')
GROUP BY c1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	range	k1	k1	5	NULL	31	Using where; Using index
SELECT c1, max(i2) FROM t1 WHERE (c1 = 'C' AND i2 = 17) OR ( c1 = 'F')
GROUP BY c1;
c1	max(i2)
C	17
F	30
EXPLAIN SELECT c1, max(i2) FROM t1 WHERE (c1 = 'C' OR ( c1 = 'F' AND i2 = 17))
GROUP BY c1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	range	k1	k1	5	NULL	31	Using where; Using index
SELECT c1, max(i2) FROM t1 WHERE (c1 = 'C' OR ( c1 = 'F' AND i2 = 17))
GROUP BY c1;
c1	max(i2)
C	30
F	17
EXPLAIN SELECT c1, max(i2) FROM t1 WHERE (c1 = 'C' OR c1 = 'F' ) AND ( i2 = 17 )
GROUP BY c1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	range	k1	k1	5	NULL	1	Using where; Using index for group-by
SELECT c1, max(i2) FROM t1 WHERE (c1 = 'C' OR c1 = 'F' ) AND ( i2 = 17 )
GROUP BY c1;
c1	max(i2)
C	17
F	17
EXPLAIN SELECT c1, max(i2) FROM t1 
WHERE ((c1 = 'C' AND (i2 = 40 OR i2 = 30)) OR ( c1 = 'F' AND (i2 = 40 )))
GROUP BY c1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	range	k1	k1	5	NULL	3	Using where; Using index
SELECT c1, max(i2) FROM t1 
WHERE ((c1 = 'C' AND (i2 = 40 OR i2 = 30)) OR ( c1 = 'F' AND (i2 = 40 )))
GROUP BY c1;
c1	max(i2)
C	30
EXPLAIN SELECT c1, i1, max(i2) FROM t2
WHERE (c1 = 'C' OR ( c1 = 'F' AND i1 < 35)) AND ( i2 = 17 )
GROUP BY c1,i1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t2	range	k2	k2	9	NULL	60	Using where; Using index for group-by
SELECT c1, i1, max(i2) FROM t2
WHERE (c1 = 'C' OR ( c1 = 'F' AND i1 < 35)) AND ( i2 = 17 )
GROUP BY c1,i1;
c1	i1	max(i2)
C	17	17
F	17	17
EXPLAIN SELECT c1, i1, max(i2) FROM t2 
WHERE (((c1 = 'C' AND i1 < 40) OR ( c1 = 'F' AND i1 < 35)) AND ( i2 = 17 ))
GROUP BY c1,i1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t2	range	k2	k2	9	NULL	60	Using where; Using index for group-by
SELECT c1, i1, max(i2) FROM t2 
WHERE (((c1 = 'C' AND i1 < 40) OR ( c1 = 'F' AND i1 < 35)) AND ( i2 = 17 ))
GROUP BY c1,i1;
c1	i1	max(i2)
C	17	17
F	17	17
EXPLAIN SELECT c1, i1, max(i2) FROM t2 
WHERE ((c1 = 'C' AND i1 < 40) OR ( c1 = 'F' AND i1 < 35) OR ( i2 = 17 ))
GROUP BY c1,i1;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t2	index	k2	k2	9	NULL	180	Using where; Using index
SELECT c1, i1, max(i2) FROM t2 
WHERE ((c1 = 'C' AND i1 < 40) OR ( c1 = 'F' AND i1 < 35) OR ( i2 = 17 ))
GROUP BY c1,i1;
c1	i1	max(i2)
A	17	17
B	17	17
C	1	1
C	2	2
C	3	3
C	4	4
C	5	5
C	6	6
C	7	7
C	8	8
C	9	9
C	10	10
C	11	11
C	12	12
C	13	13
C	14	14
C	15	15
C	16	16
C	17	17
C	18	18
C	19	19
C	20	20
C	21	21
C	22	22
C	23	23
C	24	24
C	25	25
C	26	26
C	27	27
C	28	28
C	29	29
C	30	30
D	17	17
E	17	17
F	1	1
F	2	2
F	3	3
F	4	4
F	5	5
F	6	6
F	7	7
F	8	8
F	9	9
F	10	10
F	11	11
F	12	12
F	13	13
F	14	14
F	15	15
F	16	16
F	17	17
F	18	18
F	19	19
F	20	20
F	21	21
F	22	22
F	23	23
F	24	24
F	25	25
F	26	26
F	27	27
F	28	28
F	29	29
F	30	30
DROP TABLE t0,t1,t2;
#
# MDEV-MariaDB daemon leaks memory with specific query
#
CREATE TABLE t1 (`voter_id` int(11) unsigned NOT NULL,
`language_id` int(11) unsigned NOT NULL DEFAULT '1'
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
CREATE TABLE t2 (`voter_id` int(10) unsigned NOT NULL DEFAULT '0',
`serialized_c` mediumblob) ENGINE=InnoDB DEFAULT CHARSET=utf8;
insert into t2 values (1,repeat("a",1000)),(2,repeat("a",1000)),(3,repeat("b",1000)),(4,repeat("c",1000)),(4,repeat("b",1000));
SELECT GROUP_CONCAT(t1.language_id SEPARATOR ',') AS `translation_resources`, `d`.`serialized_c` FROM t2 AS `d` LEFT JOIN t1 ON `d`.`voter_id` = t1.`voter_id` GROUP BY `d`.`voter_id` ORDER BY 10-d.voter_id+RAND()*0;
translation_resources	serialized_c
NULL	cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc
NULL	bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
NULL	aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
NULL	aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
drop table t1,t2;
#
# MDEV-30143: Segfault on select query using index for group-by and filesort
#
CREATE TABLE t1 (a varchar(35), b varchar(4)) ENGINE=InnoDB;
INSERT INTO t1 VALUES
('Albania','AXA'),('Australia','AUS'),('American Samoa','AMSA'),('Bahamas','BS');
CREATE TABLE t2 (a varchar(4), b varchar(50), PRIMARY KEY (b,a), KEY (a)) ENGINE=InnoDB;
INSERT INTO t2 VALUES
('BERM','African Methodist Episcopal'),('AUS','Anglican'),('BERM','Anglican'),('BS','Anglican'),('BS','Baptist'),('BS','Methodist');
EXPLAIN SELECT t1.a
FROM (SELECT a FROM t2 GROUP BY a ORDER BY COUNT(DISTINCT b) LIMIT 1) dt
JOIN t1 ON dt.a=t1.b;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	#	Using where
1	PRIMARY	<derived2>	ref	key0	key0	6	test.t1.b	#	
2	DERIVED	t2	range	a	a	58	NULL	#	Using index for group-by; Using temporary; Using filesort
SELECT t1.a
FROM (SELECT a FROM t2 GROUP BY a ORDER BY COUNT(DISTINCT b) LIMIT 1) dt
JOIN t1 ON dt.a=t1.b;
a
Australia
DROP TABLES t1, t2;
#
# MDEV-15656: Assertion `is_last_prefix <= 0' failed in
#             QUICK_GROUP_MIN_MAX_SELECT::get_next
#
SET @lru_depth.save= @@innodb_lru_scan_depth;
SET GLOBAL innodb_lru_scan_depth= 1024;
CREATE TABLE t1 (
pk_part1 INT AUTO_INCREMENT,
a VARCHAR(4),
row_start timestamp(6) default current_timestamp,
PRIMARY KEY (pk_part1, row_start)
) ENGINE=InnoDB;
INSERT INTO t1 (a) VALUES
('foo'),('bar'),('foo'),('bar'),('foo'),
('foo'),('bar'),('foo'),('bar'),('foo'),
('foo'),('bar'),('foo'),('bar'),('foo'),
('foo'),('bar'),('foo'),('bar'),('foo'),
('foo'),('bar'),('foo'),('bar'),('foo'),
('foo'),('bar'),('foo'),('bar'),('foo'),
('foo'),('bar'),('foo'),('bar'),('foo'),
('foo'),('bar'),('foo'),('bar'),('foo');
connect  con1,localhost,root,,test;
SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
SELECT DISTINCT pk_part1 FROM t1;
connection default;
INSERT INTO t1 (pk_part1) VALUES (NULL);
connection con1;
SELECT DISTINCT pk_part1 FROM t1;
connection default;
INSERT INTO t1 (pk_part1) VALUES (NULL);
connection con1;
SELECT DISTINCT pk_part1 FROM t1;
connection default;
INSERT INTO t1 (pk_part1) VALUES (NULL);
connection con1;
SELECT DISTINCT pk_part1 FROM t1;
connection default;
INSERT INTO t1 (pk_part1) VALUES (NULL);
connection con1;
SELECT DISTINCT pk_part1 FROM t1;
connection default;
INSERT INTO t1 (pk_part1) VALUES (NULL);
connection con1;
SELECT DISTINCT pk_part1 FROM t1;
connection default;
INSERT INTO t1 (pk_part1) VALUES (NULL);
connection con1;
SELECT DISTINCT pk_part1 FROM t1;
connection default;
INSERT INTO t1 (pk_part1) VALUES (NULL);
connection con1;
SELECT DISTINCT pk_part1 FROM t1;
connection default;
INSERT INTO t1 (pk_part1) VALUES (NULL);
connection con1;
SELECT DISTINCT pk_part1 FROM t1;
connection default;
INSERT INTO t1 (pk_part1) VALUES (NULL);
connection con1;
SELECT DISTINCT pk_part1 FROM t1;
connection default;
INSERT INTO t1 (pk_part1) VALUES (NULL);
connection con1;
SELECT DISTINCT pk_part1 FROM t1;
connection default;
INSERT INTO t1 (pk_part1) VALUES (NULL);
connection con1;
SELECT DISTINCT pk_part1 FROM t1;
connection default;
INSERT INTO t1 (pk_part1) VALUES (NULL);
connection con1;
SELECT DISTINCT pk_part1 FROM t1;
connection default;
INSERT INTO t1 (pk_part1) VALUES (NULL);
connection con1;
SELECT DISTINCT pk_part1 FROM t1;
connection default;
INSERT INTO t1 (pk_part1) VALUES (NULL);
connection con1;
SELECT DISTINCT pk_part1 FROM t1;
connection default;
INSERT INTO t1 (pk_part1) VALUES (NULL);
connection con1;
SELECT DISTINCT pk_part1 FROM t1;
connection default;
INSERT INTO t1 (pk_part1) VALUES (NULL);
connection con1;
SELECT DISTINCT pk_part1 FROM t1;
connection default;
INSERT INTO t1 (pk_part1) VALUES (NULL);
connection con1;
SELECT DISTINCT pk_part1 FROM t1;
connection default;
INSERT INTO t1 (pk_part1) VALUES (NULL);
connection con1;
SELECT DISTINCT pk_part1 FROM t1;
connection default;
INSERT INTO t1 (pk_part1) VALUES (NULL);
connection con1;
SELECT DISTINCT pk_part1 FROM t1;
connection default;
INSERT INTO t1 (pk_part1) VALUES (NULL);
connection con1;
disconnect con1;
connection default;
DROP TABLE t1;
SET GLOBAL innodb_lru_scan_depth= @lru_depth.save;
set global innodb_stats_persistent= @innodb_stats_persistent_save;
set global innodb_stats_persistent_sample_pages=
@innodb_stats_persistent_sample_pages_save;