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create table t1 (a int not null,b int not null, primary key using HASH (a)) engine=heap comment="testing heaps" avg_row_length=100 min_rows=1 max_rows=100;
insert into t1 values(1,1),(2,2),(3,3),(4,4);
delete from t1 where a=1 or a=0;
show keys from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Ignored
t1	0	PRIMARY	1	a	NULL	3	NULL	NULL		HASH			NO
select * from t1;
a	b
2	2
3	3
4	4
select * from t1 where a=4;
a	b
4	4
update t1 set b=5 where a=4;
update t1 set b=b+1 where a>=3;
replace t1 values (3,3);
select * from t1;
a	b
2	2
3	3
4	6
alter table t1 add c int not null, add key using HASH (c,a);
drop table t1;
create table t1 (a int not null,b int not null, primary key using HASH (a)) engine=heap comment="testing heaps";
insert into t1 values(1,1),(2,2),(3,3),(4,4);
delete from t1 where a > 0;
select * from t1;
a	b
drop table t1;
create table t1 (a int not null,b int not null, primary key using HASH (a)) engine=heap comment="testing heaps";
insert into t1 values(1,1),(2,2),(3,3),(4,4);
alter table t1 modify a int not null auto_increment, engine=myisam, comment="new myisam table";
select * from t1;
a	b
1	1
2	2
3	3
4	4
drop table t1;
create table t1 (a int not null) engine=heap;
insert into t1 values (869751),(736494),(226312),(802616),(728912);
select * from t1 where a > 736494;
a
869751
802616
alter table t1 add unique uniq_id using HASH (a);
select * from t1 where a > 736494;
a
869751
802616
select * from t1 where a = 736494;
a
736494
select * from t1 where a=869751 or a=736494;
a
736494
869751
select * from t1 where a in (869751,736494,226312,802616);
a
226312
736494
802616
869751
alter table t1 engine=myisam;
explain select * from t1 where a in (869751,736494,226312,802616);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ALL	uniq_id	NULL	NULL	NULL	5	Using where
drop table t1;
create table t1 (x int not null, y int not null, key x  using HASH (x), unique y  using HASH (y))
engine=heap;
insert into t1 values (1,1),(2,2),(1,3),(2,4),(2,5),(2,6);
select * from t1 where x=1;
x	y
1	3
1	1
select * from t1,t1 as t2 where t1.x=t2.y;
x	y	x	y
1	1	1	1
2	2	2	2
1	3	1	1
2	4	2	2
2	5	2	2
2	6	2	2
explain select * from t1,t1 as t2 where t1.x=t2.y;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ALL	x	NULL	NULL	NULL	6	
1	SIMPLE	t2	eq_ref	y	y	4	test.t1.x	1	
drop table t1;
create table t1 (a int) engine=heap;
insert into t1 values(1);
select max(a) from t1;
max(a)
1
drop table t1;
CREATE TABLE t1 ( a int not null default 0, b int not null default 0,  key  using HASH (a),  key  using HASH (b)  ) ENGINE=HEAP;
insert into t1 values(1,1),(1,2),(2,3),(1,3),(1,4),(1,5),(1,6);
select * from t1 where a=1;
a	b
1	6
1	5
1	4
1	3
1	2
1	1
insert into t1 values(1,1),(1,2),(2,3),(1,3),(1,4),(1,5),(1,6);
select * from t1 where a=1;
a	b
1	6
1	5
1	4
1	3
1	2
1	1
1	6
1	5
1	4
1	3
1	2
1	1
drop table t1;
create table t1 (id int unsigned not null, primary key  using HASH (id)) engine=HEAP;
insert into t1 values(1);
select max(id) from t1;
max(id)
1
insert into t1 values(2);
select max(id) from t1;
max(id)
2
replace into t1 values(1);
drop table t1;
create table t1 (n int) engine=heap;
drop table t1;
create table t1 (n int) engine=heap;
drop table if exists t1;
CREATE table t1(f1 int not null,f2 char(20) not 
null,index(f2)) engine=heap;
INSERT into t1 set f1=12,f2="bill";
INSERT into t1 set f1=13,f2="bill";
INSERT into t1 set f1=14,f2="bill";
INSERT into t1 set f1=15,f2="bill";
INSERT into t1 set f1=16,f2="ted";
INSERT into t1 set f1=12,f2="ted";
INSERT into t1 set f1=12,f2="ted";
INSERT into t1 set f1=12,f2="ted";
INSERT into t1 set f1=12,f2="ted";
delete from t1 where f2="bill";
select * from t1;
f1	f2
16	ted
12	ted
12	ted
12	ted
12	ted
drop table t1;
create table t1 (btn char(10) not null, key using HASH (btn)) engine=heap;
insert into t1 values ("hello"),("hello"),("hello"),("hello"),("hello"),("a"),("b"),("c"),("d"),("e"),("f"),("g"),("h"),("i");
explain select * from t1 where btn like "q%";
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ALL	btn	NULL	NULL	NULL	14	Using where
select * from t1 where btn like "q%";
btn
alter table t1 add column new_col char(1) not null, add key using HASH (btn,new_col), drop key btn;
update t1 set new_col=left(btn,1);
explain select * from t1 where btn="a";
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ALL	btn	NULL	NULL	NULL	14	Using where
explain select * from t1 where btn="a" and new_col="a";
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	btn	btn	11	const,const	2	Using where
drop table t1;
CREATE TABLE t1 (
a int default NULL,
b int default NULL,
KEY a using HASH (a),
UNIQUE b using HASH (b)
) engine=heap;
INSERT INTO t1 VALUES (NULL,99),(99,NULL),(1,1),(2,2),(1,3);
SELECT * FROM t1 WHERE a=NULL;
a	b
explain SELECT * FROM t1 WHERE a IS NULL;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	a	a	5	const	2	Using where
SELECT * FROM t1 WHERE a<=>NULL;
a	b
NULL	99
SELECT * FROM t1 WHERE b=NULL;
a	b
explain SELECT * FROM t1 WHERE b IS NULL;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	b	b	5	const	1	Using where
SELECT * FROM t1 WHERE b<=>NULL;
a	b
99	NULL
INSERT INTO t1 VALUES (1,3);
ERROR 23000: Duplicate entry '3' for key 'b'
DROP TABLE t1;
CREATE TABLE t1 (a int not null, primary key using HASH (a)) engine=heap;
INSERT into t1 values (1),(2),(3),(4),(5),(6),(7),(8),(9),(10),(11);
DELETE from t1 where a < 100;
SELECT * from t1;
a
DROP TABLE t1;
create table t1
(
a char(8) not null,
b char(20) not null,
c int not null,
key (a)
) engine=heap;
insert into t1 values ('aaaa', 'prefill-hash=5',0);
insert into t1 values ('aaab', 'prefill-hash=0',0);
insert into t1 values ('aaac', 'prefill-hash=7',0);
insert into t1 values ('aaad', 'prefill-hash=2',0);
insert into t1 values ('aaae', 'prefill-hash=1',0);
insert into t1 values ('aaaf', 'prefill-hash=4',0);
insert into t1 values ('aaag', 'prefill-hash=3',0);
insert into t1 values ('aaah', 'prefill-hash=6',0);
explain select * from t1 where a='aaaa';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	a	a	8	const	2	Using where
explain select * from t1 where a='aaab';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	a	a	8	const	2	Using where
explain select * from t1 where a='aaac';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	a	a	8	const	2	Using where
explain select * from t1 where a='aaad';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	a	a	8	const	2	Using where
insert into t1 select * from t1;
flush tables;
explain select * from t1 where a='aaaa';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	a	a	8	const	2	Using where
explain select * from t1 where a='aaab';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	a	a	8	const	2	Using where
explain select * from t1 where a='aaac';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	a	a	8	const	2	Using where
explain select * from t1 where a='aaad';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	a	a	8	const	2	Using where
flush tables;
explain select * from t1 where a='aaaa';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	a	a	8	const	2	Using where
explain select * from t1 where a='aaab';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	a	a	8	const	2	Using where
explain select * from t1 where a='aaac';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	a	a	8	const	2	Using where
explain select * from t1 where a='aaad';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	a	a	8	const	2	Using where
create table t2 as select * from t1;
delete from t1;
insert into t1 select * from t2;
explain select * from t1 where a='aaaa';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	a	a	8	const	2	Using where
explain select * from t1 where a='aaab';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	a	a	8	const	2	Using where
explain select * from t1 where a='aaac';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	a	a	8	const	2	Using where
explain select * from t1 where a='aaad';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	a	a	8	const	2	Using where
drop table t1, t2;
create table t1 (
id int unsigned not null primary key auto_increment, 
name varchar(20) not null,
index heap_idx(name),
index btree_idx using btree(name)
) engine=heap;
create table t2 (
id int unsigned not null primary key auto_increment, 
name varchar(20) not null,
index btree_idx using btree(name),
index heap_idx(name)
) engine=heap;
insert into t1 (name) values ('Matt'), ('Lilu'), ('Corbin'), ('Carly'), 
('Suzy'), ('Hoppy'), ('Burrito'), ('Mimi'), ('Sherry'), ('Ben'), ('Phil'), 
('Emily'), ('Mike');
insert into t2 select * from t1;
explain select * from t1 where name='matt';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	heap_idx,btree_idx	btree_idx	22	const	1	Using where
explain select * from t2 where name='matt';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t2	ref	btree_idx,heap_idx	btree_idx	22	const	1	Using where
explain select * from t1 where name='Lilu';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	heap_idx,btree_idx	btree_idx	22	const	1	Using where
explain select * from t2 where name='Lilu';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t2	ref	btree_idx,heap_idx	btree_idx	22	const	1	Using where
explain select * from t1 where name='Phil';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	heap_idx,btree_idx	btree_idx	22	const	1	Using where
explain select * from t2 where name='Phil';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t2	ref	btree_idx,heap_idx	btree_idx	22	const	1	Using where
explain select * from t1 where name='Lilu';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	heap_idx,btree_idx	btree_idx	22	const	1	Using where
explain select * from t2 where name='Lilu';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t2	ref	btree_idx,heap_idx	btree_idx	22	const	1	Using where
insert into t1 (name) select name from t2;
insert into t1 (name) select name from t2;
insert into t1 (name) select name from t2;
insert into t1 (name) select name from t2;
insert into t1 (name) select name from t2;
insert into t1 (name) select name from t2;
flush tables;
select count(*) from t1 where name='Matt';
count(*)
7
explain select * from t1 ignore index (btree_idx) where name='matt';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	heap_idx	heap_idx	22	const	7	Using where
show index from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Ignored
t1	0	PRIMARY	1	id	NULL	91	NULL	NULL		HASH			NO
t1	1	heap_idx	1	name	NULL	13	NULL	NULL		HASH			NO
t1	1	btree_idx	1	name	A	NULL	NULL	NULL		BTREE			NO
show index from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Ignored
t1	0	PRIMARY	1	id	NULL	91	NULL	NULL		HASH			NO
t1	1	heap_idx	1	name	NULL	13	NULL	NULL		HASH			NO
t1	1	btree_idx	1	name	A	NULL	NULL	NULL		BTREE			NO
create table t3
(
a varchar(20) not null,
b varchar(20) not null,
key (a,b)
) engine=heap;
insert into t3 select name, name from t1;
show index from t3;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Ignored
t3	1	a	1	a	NULL	NULL	NULL	NULL		HASH			NO
t3	1	a	2	b	NULL	13	NULL	NULL		HASH			NO
show index from t3;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Ignored
t3	1	a	1	a	NULL	NULL	NULL	NULL		HASH			NO
t3	1	a	2	b	NULL	13	NULL	NULL		HASH			NO
explain select * from t1 ignore key(btree_idx), t3 where t1.name='matt' and t3.a = concat('',t1.name) and t3.b=t1.name;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	heap_idx	heap_idx	22	const	7	Using where
1	SIMPLE	t3	ref	a	a	44	func,const	7	Using where
drop table t1, t2, t3;
create temporary table t1 ( a int, index (a) ) engine=memory;
insert into t1 values (1),(2),(3),(4),(5);
select a from t1 where a in (1,3);
a
1
3
explain select a from t1 where a in (1,3);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	range	a	a	5	NULL	4	Using where
drop table t1;
End of 4.1 tests
CREATE TABLE t1(col1 VARCHAR(32) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL, 
col2 VARCHAR(32) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL, 
UNIQUE KEY key1 USING HASH (col1, col2)) ENGINE=MEMORY;
INSERT INTO t1 VALUES('A', 'A');
INSERT INTO t1 VALUES('A ', 'A ');
ERROR 23000: Duplicate entry 'A -A ' for key 'key1'
DROP TABLE t1;
CREATE TABLE t1(col1 VARCHAR(32) CHARACTER SET latin1 COLLATE latin1_bin NOT NULL, 
col2 VARCHAR(32) CHARACTER SET latin1 COLLATE latin1_bin NOT NULL, 
UNIQUE KEY key1 USING HASH (col1, col2)) ENGINE=MEMORY;
INSERT INTO t1 VALUES('A', 'A');
INSERT INTO t1 VALUES('A ', 'A ');
ERROR 23000: Duplicate entry 'A -A ' for key 'key1'
DROP TABLE t1;
End of 5.0 tests
#
# MDEV-568 (AKA LP BUG#1007981, AKA MySQL bug#44771)
# Wrong result for a hash index look-up if the index is unique and
# the key is NULL
#
CREATE TABLE t1 ( pk INT PRIMARY KEY, val INT, UNIQUE KEY USING HASH(val)) ENGINE=MEMORY;
INSERT INTO t1 VALUES (1, NULL);
INSERT INTO t1 VALUES (2, NULL);
INSERT INTO t1 VALUES (3, 1);
INSERT INTO t1 VALUES (4, NULL);
EXPLAIN SELECT * FROM t1 WHERE val IS NULL;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	val	val	5	const	1	Using where
SELECT * FROM t1 WHERE val IS NULL;
pk	val
4	NULL
2	NULL
1	NULL
drop table t1;
End of 5.2 tests
# bit index in heap tables
create table t1 (a bit(63) not null) engine=heap;
insert into t1 values (869751),(736494),(226312),(802616),(728912);
alter table t1 add unique uniq_id using HASH (a);
select 0+a from t1 where a > 736494;
0+a
869751
802616
explain select 0+a from t1 where a > 736494;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ALL	uniq_id	NULL	NULL	NULL	5	Using where
select 0+a from t1 where a = 736494;
0+a
736494
explain select 0+a from t1 where a = 736494;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	const	uniq_id	uniq_id	8	const	1	
select 0+a from t1 where a=869751 or a=736494;
0+a
736494
869751
explain select 0+a from t1 where a=869751 or a=736494;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	range	uniq_id	uniq_id	8	NULL	2	Using where
select 0+a from t1 where a in (869751,736494,226312,802616,728912);
0+a
226312
728912
736494
802616
869751
explain select 0+a from t1 where a in (869751,736494,226312,802616,728912);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	range	uniq_id	uniq_id	8	NULL	5	Using where
drop table t1;
End of 5.3 tests
#
# Bug #55472: Assertion failed in heap_rfirst function of hp_rfirst.c
#             on DELETE statement
#
CREATE TABLE t1 (col_int_nokey INT,
col_int_key INT,
INDEX(col_int_key) USING HASH) ENGINE = HEAP;
INSERT INTO t1 (col_int_nokey, col_int_key) VALUES (3, 0), (4, 0), (3, 1);
DELETE FROM t1 WHERE col_int_nokey = 5 ORDER BY col_int_key LIMIT 2;
DROP TABLE t1;
#
# Bug #1002564: Wrong result for a lookup query from a heap table
#
CREATE TABLE t1 (c1 VARCHAR(10) NOT NULL, KEY i1 (c1(3))) ENGINE=MEMORY DEFAULT CHARSET=latin1;
INSERT INTO t1 VALUES ('foo1'), ('bar2'), ('baz3');
explain SELECT * FROM t1 WHERE c1='bar2';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	i1	i1	5	const	2	Using where
SELECT * FROM t1 WHERE c1='bar2';
c1
bar2
ALTER TABLE t1 DROP KEY i1, ADD KEY il (c1(3)) using btree;
explain SELECT * FROM t1 WHERE c1='bar2';
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	t1	ref	il	il	5	const	1	Using where
SELECT * FROM t1 WHERE c1='bar2';
c1
bar2
DROP TABLE t1;
#
# End of 5.5 tests
#
#
# MDEV-27406 Index on a HEAP table retains DESC attribute despite being hash
#
create table t1 (a int, key(a desc)) engine=memory;
show index from t1;
Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment	Ignored
t1	1	a	1	a	NULL	0	NULL	NULL	YES	HASH			NO
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) DEFAULT NULL,
  KEY `a` (`a`)
) ENGINE=MEMORY DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
drop table t1;
#
# End of 10.8 tests
#