mariadb/mysql-test/t/heap_hash.test

#
# Test of heap tables.
#

--disable_warnings
drop table if exists t1,t2;
--enable_warnings

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 table status like "t1";
show keys from t1;
select * from t1;
select * from t1 where a=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;
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;
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";
#show table status like "t1";
select * from t1;
drop table t1;

create table t1 (a int not null) engine=heap;
insert into t1 values (869751),(736494),(226312),(802616);
select * from t1 where a > 736494;
alter table t1 add unique uniq_id using HASH (a);
select * from t1 where a > 736494;
select * from t1 where a = 736494;
select * from t1 where a=869751 or a=736494;
select * from t1 where a in (869751,736494,226312,802616);
alter table t1 engine=myisam;
explain select * from t1 where a in (869751,736494,226312,802616);
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;
select * from t1,t1 as t2 where t1.x=t2.y;
explain select * from t1,t1 as t2 where t1.x=t2.y;
drop table t1;

create table t1 (a int) engine=heap;
insert into t1 values(1);
select max(a) from t1;
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; 
insert into t1 values(1,1),(1,2),(2,3),(1,3),(1,4),(1,5),(1,6);
select * from t1 where a=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; 
insert into t1 values(2);
select max(id) from t1; 
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;

# Test of non unique index

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;
drop table t1;

#
# Test when using part key searches
#

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%";
select * from t1 where btn like "q%";
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";
explain select * from t1 where btn="a" and new_col="a";
drop table t1;

#
# Test of NULL keys
#

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;
explain SELECT * FROM t1 WHERE a IS NULL;
SELECT * FROM t1 WHERE a<=>NULL;
SELECT * FROM t1 WHERE b=NULL;
explain SELECT * FROM t1 WHERE b IS NULL;
SELECT * FROM t1 WHERE b<=>NULL;

--error 1062
INSERT INTO t1 VALUES (1,3);
DROP TABLE t1;

#
# Test when deleting all rows
#

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;
DROP TABLE t1;


#
# Hash index # records estimate test
#
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';
explain select * from t1 where a='aaab';
explain select * from t1 where a='aaac';
explain select * from t1 where a='aaad';
insert into t1 select * from t1;

explain select * from t1 where a='aaaa';
explain select * from t1 where a='aaab';
explain select * from t1 where a='aaac';
explain select * from t1 where a='aaad';

# a known effect: table reload causes statistics to be updated:
flush tables;
explain select * from t1 where a='aaaa';
explain select * from t1 where a='aaab';
explain select * from t1 where a='aaac';
explain select * from t1 where a='aaad';

# Check if delete_all_rows() updates #hash_buckets
create table t2 as select * from t1;
delete from t1;
insert into t1 select * from t2;
explain select * from t1 where a='aaaa';
explain select * from t1 where a='aaab';
explain select * from t1 where a='aaac';
explain select * from t1 where a='aaad';
drop table t1, t2;


# Btree and hash index use costs. 
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';
explain select * from t2 where name='matt';

explain select * from t1 where name='Lilu';
explain select * from t2 where name='Lilu';

explain select * from t1 where name='Phil';
explain select * from t2 where name='Phil';

explain select * from t1 where name='Lilu';
explain select * from t2 where name='Lilu';

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';
explain select * from t1 ignore index (btree_idx) where name='matt';
show index from t1;

show index from t1;

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;
show index from t3;

# test rec_per_key use for joins.
explain select * from t1 ignore key(btree_idx), t3 where t1.name='matt' and t3.a = concat('',t1.name) and t3.b=t1.name;

drop table t1, t2, t3;

# Fix for BUG#8371: wrong rec_per_key value for hash index on temporary table
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);
explain select a from t1 where a in (1,3);
drop table t1;