CREATE TABLE t1 (
a int not null,
b int not null,
primary key(a),
index (b))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1, 1);
INSERT into t1 values (2, 5);
INSERT into t1 values (30, 4);
INSERT into t1 values (35, 2);
select * from t1 order by b;
a	b
1	1
35	2
30	4
2	5
select * from t1 force index (b) where b > 0 order by b;
a	b
1	1
35	2
30	4
2	5
drop table t1;
CREATE TABLE t1 (
a int not null,
b int unsigned not null,
primary key(a),
index (b))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1, 1);
INSERT into t1 values (2, 5);
INSERT into t1 values (30, 4);
INSERT into t1 values (35, 2);
select * from t1 force index (b) where b > 0 order by b;
a	b
1	1
35	2
30	4
2	5
drop table t1;
CREATE TABLE t1 (
a int not null,
b tinyint not null,
primary key(a),
index (b))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1, 1);
INSERT into t1 values (2, 5);
INSERT into t1 values (30, 4);
INSERT into t1 values (35, 2);
select * from t1 force index (b) where b > 0 order by b;
a	b
1	1
35	2
30	4
2	5
drop table t1;
CREATE TABLE t1 (
a int not null,
b tinyint unsigned not null,
primary key(a),
index (b))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1, 1);
INSERT into t1 values (2, 5);
INSERT into t1 values (30, 4);
INSERT into t1 values (35, 2);
select * from t1 force index (b) where b > 0 order by b;
a	b
1	1
35	2
30	4
2	5
drop table t1;
CREATE TABLE t1 (
a int not null,
b smallint not null,
primary key(a),
index (b))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1, 1);
INSERT into t1 values (2, 5);
INSERT into t1 values (30, 4);
INSERT into t1 values (35, 2);
select * from t1 force index (b) where b > 0 order by b;
a	b
1	1
35	2
30	4
2	5
drop table t1;
CREATE TABLE t1 (
a int not null,
b smallint unsigned not null,
primary key(a),
index (b))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1, 1);
INSERT into t1 values (2, 5);
INSERT into t1 values (30, 4);
INSERT into t1 values (35, 2);
select * from t1 force index (b) where b > 0 order by b;
a	b
1	1
35	2
30	4
2	5
drop table t1;
CREATE TABLE t1 (
a int not null,
b mediumint not null,
primary key(a),
index (b))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1, 1);
INSERT into t1 values (2, 5);
INSERT into t1 values (30, 4);
INSERT into t1 values (35, 2);
select * from t1 force index (b) where b > 0 order by b;
a	b
1	1
35	2
30	4
2	5
drop table t1;
CREATE TABLE t1 (
a int not null,
b mediumint unsigned not null,
primary key(a),
index (b))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1, 1);
INSERT into t1 values (2, 5);
INSERT into t1 values (30, 4);
INSERT into t1 values (35, 2);
select * from t1 force index (b) where b > 0 order by b;
a	b
1	1
35	2
30	4
2	5
drop table t1;
CREATE TABLE t1 (
a int not null,
b bigint unsigned not null,
primary key(a),
index (b))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1, 1);
INSERT into t1 values (2, 5);
INSERT into t1 values (30, 4);
INSERT into t1 values (35, 2);
select * from t1 force index (b) where b > 0 order by b;
a	b
1	1
35	2
30	4
2	5
drop table t1;
CREATE TABLE t1 (
a int not null,
b bigint not null,
primary key(a),
index (b))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1, 1);
INSERT into t1 values (2, 5);
INSERT into t1 values (30, 4);
INSERT into t1 values (35, 2);
select * from t1 force index (b) where b > 0 order by b;
a	b
1	1
35	2
30	4
2	5
drop table t1;
CREATE TABLE t1 (
a int not null,
b bigint not null,
primary key(a),
index (b))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1, 1);
INSERT into t1 values (2, 5);
INSERT into t1 values (30, 4);
INSERT into t1 values (35, 2);
select * from t1 force index (b) where b > 0 order by b;
a	b
1	1
35	2
30	4
2	5
drop table t1;
CREATE TABLE t1 (
a int not null,
b float not null,
primary key(a),
index (b))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1, 1);
INSERT into t1 values (2, 5);
INSERT into t1 values (30, 4);
INSERT into t1 values (35, 2);
select * from t1 force index (b) where b > 0 order by b;
a	b
1	1
35	2
30	4
2	5
drop table t1;
CREATE TABLE t1 (
a int not null,
b double not null,
primary key(a),
index (b))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1, 1);
INSERT into t1 values (2, 5);
INSERT into t1 values (30, 4);
INSERT into t1 values (35, 2);
select * from t1 force index (b) where b > 0 order by b;
a	b
1	1
35	2
30	4
2	5
drop table t1;
CREATE TABLE t1 (
a int not null,
b double unsigned not null,
primary key(a),
index (b))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1, 1);
INSERT into t1 values (2, 5);
INSERT into t1 values (30, 4);
INSERT into t1 values (35, 2);
select * from t1 force index (b) where b > 0 order by b;
a	b
1	1
35	2
30	4
2	5
drop table t1;
CREATE TABLE t1 (
a int not null,
b float unsigned not null,
primary key(a),
index (b))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1, 1);
INSERT into t1 values (2, 5);
INSERT into t1 values (30, 4);
INSERT into t1 values (35, 2);
select * from t1 force index (b) where b > 0 order by b;
a	b
1	1
35	2
30	4
2	5
drop table t1;
CREATE TABLE t1 (
a int not null,
b double precision not null,
primary key(a),
index (b))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1, 1);
INSERT into t1 values (2, 5);
INSERT into t1 values (30, 4);
INSERT into t1 values (35, 2);
select * from t1 force index (b) where b > 0 order by b;
a	b
1	1
35	2
30	4
2	5
drop table t1;
CREATE TABLE t1 (
a int not null,
b double precision unsigned not null,
primary key(a),
index (b))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1, 1);
INSERT into t1 values (2, 5);
INSERT into t1 values (30, 4);
INSERT into t1 values (35, 2);
select * from t1 force index (b) where b > 0 order by b;
a	b
1	1
35	2
30	4
2	5
drop table t1;
CREATE TABLE t1 (
a int not null,
b decimal not null,
primary key(a),
index (b))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1, 1);
INSERT into t1 values (2, 5);
INSERT into t1 values (30, 4);
INSERT into t1 values (35, 2);
select * from t1 force index (b) where b > 0 order by b;
a	b
1	1
35	2
30	4
2	5
drop table t1;
CREATE TABLE t1 (
a int not null,
b char(10) not null,
primary key(a),
index (b))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1, '1');
INSERT into t1 values (2, '5');
INSERT into t1 values (30, '4');
INSERT into t1 values (35, '2');
select * from t1 force index (b) where b > 0 order by b;
a	b
1	1
35	2
30	4
2	5
drop table t1;
CREATE TABLE t1 (
a int not null,
b varchar(10) not null,
primary key(a),
index (b))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1, '1');
INSERT into t1 values (2, '5');
INSERT into t1 values (30, '4');
INSERT into t1 values (35, '2');
select * from t1 force index (b) where b > '0' order by b;
a	b
1	1
35	2
30	4
2	5
drop table t1;
CREATE TABLE t1 (
a int not null,
b varchar(10) not null,
primary key(a),
index (b(5)))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1, '1');
INSERT into t1 values (2, '5');
INSERT into t1 values (30, '4');
INSERT into t1 values (35, '2');
select * from t1 force index (b) where b > '0' order by b;
a	b
1	1
35	2
30	4
2	5
drop table t1;
CREATE TABLE t1 (
a int not null,
b varchar(10) binary not null,
primary key(a),
index (b))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1, '1');
INSERT into t1 values (2, '5');
INSERT into t1 values (30, '4');
INSERT into t1 values (35, '2');
select * from t1 force index (b) where b > '0' order by b;
a	b
1	1
35	2
30	4
2	5
drop table t1;
CREATE TABLE t1 (
a int not null,
b tinytext not null,
primary key(a),
index (b(10)))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1, '1');
INSERT into t1 values (2, '5');
INSERT into t1 values (30, '4');
INSERT into t1 values (35, '2');
select * from t1 force index (b) where b > '0' order by b;
a	b
1	1
35	2
30	4
2	5
drop table t1;
CREATE TABLE t1 (
a int not null,
b text not null,
primary key(a),
index (b(10)))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1, '1');
INSERT into t1 values (2, '5');
INSERT into t1 values (30, '4');
INSERT into t1 values (35, '2');
select * from t1 force index (b) where b > '0' order by b;
a	b
1	1
35	2
30	4
2	5
drop table t1;
CREATE TABLE t1 (
a int not null,
b mediumtext not null,
primary key(a),
index (b(10)))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1, '1');
INSERT into t1 values (2, '5');
INSERT into t1 values (30, '4');
INSERT into t1 values (35, '2');
select * from t1 force index (b) where b > '0' order by b;
a	b
1	1
35	2
30	4
2	5
drop table t1;
CREATE TABLE t1 (
a int not null,
b longtext not null,
primary key(a),
index (b(10)))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1, '1');
INSERT into t1 values (2, '5');
INSERT into t1 values (30, '4');
INSERT into t1 values (35, '2');
select * from t1 force index (b) where b > '0' order by b;
a	b
1	1
35	2
30	4
2	5
drop table t1;
CREATE TABLE t1 (
a int not null,
b enum('1','2', '4', '5') not null,
primary key(a),
index (b))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1, '1');
INSERT into t1 values (2, '5');
INSERT into t1 values (30, '4');
INSERT into t1 values (35, '2');
select * from t1 force index (b) where b >= '1' order by b;
a	b
1	1
35	2
30	4
2	5
drop table t1;
CREATE TABLE t1 (
a int not null,
b set('1','2', '4', '5') not null,
primary key(a),
index (b))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1, '1');
INSERT into t1 values (2, '5');
INSERT into t1 values (30, '4');
INSERT into t1 values (35, '2');
select * from t1 force index (b) where b >= '1' order by b;
a	b
1	1
35	2
30	4
2	5
drop table t1;
CREATE TABLE t1 (
a int not null,
b date not null,
primary key(a),
index (b))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1, '2001-01-01');
INSERT into t1 values (2, '2005-01-01');
INSERT into t1 values (30, '2004-01-01');
INSERT into t1 values (35, '2002-01-01');
select * from t1 force index (b) where b > '2000-01-01' order by b;
a	b
1	2001-01-01
35	2002-01-01
30	2004-01-01
2	2005-01-01
drop table t1;
CREATE TABLE t1 (
a int not null,
b datetime not null,
primary key(a),
index (b))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1, '2001-01-01 00:00:00');
INSERT into t1 values (2, '2005-01-01 00:00:00');
INSERT into t1 values (30, '2004-01-01 00:00:00');
INSERT into t1 values (35, '2002-01-01 00:00:00');
select * from t1 force index (b) where b > '2000-01-01 00:00:00' order by b;
a	b
1	2001-01-01 00:00:00
35	2002-01-01 00:00:00
30	2004-01-01 00:00:00
2	2005-01-01 00:00:00
drop table t1;
CREATE TABLE t1 (
a int not null,
b timestamp not null,
primary key(a),
index (b))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1, '2001-01-01 00:00:00');
INSERT into t1 values (2, '2005-01-01 00:00:00');
INSERT into t1 values (30, '2004-01-01 00:00:00');
INSERT into t1 values (35, '2002-01-01 00:00:00');
select * from t1 force index (b) where b > '2000-01-01 00:00:00' order by b;
a	b
1	2001-01-01 00:00:00
35	2002-01-01 00:00:00
30	2004-01-01 00:00:00
2	2005-01-01 00:00:00
drop table t1;
CREATE TABLE t1 (
a int not null,
b time not null,
primary key(a),
index (b))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1, '01:00:00');
INSERT into t1 values (2, '05:00:00');
INSERT into t1 values (30, '04:00:00');
INSERT into t1 values (35, '02:00:00');
select * from t1 force index (b) where b > '00:00:00' order by b;
a	b
1	01:00:00
35	02:00:00
30	04:00:00
2	05:00:00
drop table t1;
CREATE TABLE t1 (
a int not null,
b year not null,
primary key(a),
index (b))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1, 2001);
INSERT into t1 values (2, 2005);
INSERT into t1 values (30, 2004);
INSERT into t1 values (35, 2002);
select * from t1 force index (b) where b > 2000 order by b;
a	b
1	2001
35	2002
30	2004
2	2005
drop table t1;
CREATE TABLE t1 (
a int not null,
b bit(5) not null,
c int,
primary key(a),
index (b))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1, b'00001', NULL);
INSERT into t1 values (2, b'00101', 2);
INSERT into t1 values (30, b'00100', 2);
INSERT into t1 values (35, b'00010', NULL);
select a from t1 force index (b) where b > b'00000' order by b;
a
1
35
30
2
drop table t1;
CREATE TABLE t1 (
a int not null,
b bit(15) not null,
c int,
primary key(a),
index (b))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1,  b'000000000000001', NULL);
INSERT into t1 values (2,  b'001010000000101', 2);
INSERT into t1 values (30, b'001000000000100', 2);
INSERT into t1 values (35, b'000100000000010', NULL);
select a from t1 force index (b) where b > b'000000000000000' order by b;
a
1
35
30
2
drop table t1;
CREATE TABLE t1 (
a int not null,
b int,
primary key(a),
index (b))
partition by range (a)
partitions 2
(partition x1 values less than (25),
partition x2 values less than (100));
INSERT into t1 values (1, 1);
INSERT into t1 values (5, NULL);
INSERT into t1 values (2, 4);
INSERT into t1 values (3, 3);
INSERT into t1 values (4, 5);
INSERT into t1 values (7, 1);
INSERT into t1 values (6, 6);
INSERT into t1 values (30, 4);
INSERT into t1 values (35, 2);
INSERT into t1 values (40, NULL);
select * from t1 force index (b) where b < 10 OR b IS NULL order by b;
a	b
5	NULL
40	NULL
1	1
7	1
35	2
3	3
30	4
2	4
4	5
6	6
select * from t1 force index (b) where b < 10 ORDER BY b;
a	b
1	1
7	1
35	2
3	3
30	4
2	4
4	5
6	6
select * from t1 force index (b) where b < 10 ORDER BY b DESC;
a	b
6	6
4	5
2	4
30	4
3	3
35	2
7	1
1	1
drop table t1;
create table t1 (a int not null, b int, c varchar(20), key (a,b,c))
partition by range (b)
(partition p0 values less than (5),
partition p1 values less than (10));
INSERT into t1 values (1,1,'1'),(2,2,'2'),(1,3,'3'),(2,4,'4'),(1,5,'5');
INSERT into t1 values (2,6,'6'),(1,7,'7'),(2,8,'8'),(1,9,'9');
INSERT into t1 values (1, NULL, NULL), (2, NULL, '10');
select * from t1 where a = 1 order by a desc, b desc;
a	b	c
1	9	9
1	7	7
1	5	5
1	3	3
1	1	1
1	NULL	NULL
select * from t1 where a = 1 order by b desc;
a	b	c
1	9	9
1	7	7
1	5	5
1	3	3
1	1	1
1	NULL	NULL
drop table t1;
#
# MDEV-13756 Implement descending index: KEY (a DESC, b ASC)
#
create table t1 (a int, b int, key(a desc)) partition by hash(a) partitions 4;
insert into t1 values (1,1),(2,2),(3,3),(4,4),(5,5),(6,6);
explain select * from t1 order by a limit 3;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	index	NULL	a	5	NULL	3	
select * from t1 order by a limit 3;
a	b
1	1
2	2
3	3
drop table t1;