heap_hash.test
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上传日期:2022-05-23
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文件大小:8k
- #
- # 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;
- # avoid statistics differences between normal and ps-protocol tests
- 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';
- # 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;
- # End of 4.1 tests