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|
drop table if exists t1;
drop database if exists test2;
set autocommit=0;
create table t1 (
a int not null primary key,
b text not null,
c int not null,
d longblob,
key (c)
) engine=ndbcluster;
set @x0 = '01234567012345670123456701234567';
set @x0 = concat(@x0,@x0,@x0,@x0,@x0,@x0,@x0,@x0);
set @b1 = 'b1';
set @b1 = concat(@b1,@b1,@b1,@b1,@b1,@b1,@b1,@b1,@b1,@b1);
set @b1 = concat(@b1,@b1,@b1,@b1,@b1,@b1,@b1,@b1,@b1,@b1);
set @b1 = concat(@b1,@b1,@b1,@b1,@b1,@b1,@b1,@b1,@b1,@b1);
set @b1 = concat(@b1,@x0);
set @d1 = 'dd1';
set @d1 = concat(@d1,@d1,@d1,@d1,@d1,@d1,@d1,@d1,@d1,@d1);
set @d1 = concat(@d1,@d1,@d1,@d1,@d1,@d1,@d1,@d1,@d1,@d1);
set @d1 = concat(@d1,@d1,@d1,@d1,@d1,@d1,@d1,@d1,@d1,@d1);
set @b2 = 'b2';
set @b2 = concat(@b2,@b2,@b2,@b2,@b2,@b2,@b2,@b2,@b2,@b2);
set @b2 = concat(@b2,@b2,@b2,@b2,@b2,@b2,@b2,@b2,@b2,@b2);
set @b2 = concat(@b2,@b2,@b2,@b2,@b2,@b2,@b2,@b2,@b2,@b2);
set @b2 = concat(@b2,@b2,@b2,@b2,@b2,@b2,@b2,@b2,@b2,@b2);
set @d2 = 'dd2';
set @d2 = concat(@d2,@d2,@d2,@d2,@d2,@d2,@d2,@d2,@d2,@d2);
set @d2 = concat(@d2,@d2,@d2,@d2,@d2,@d2,@d2,@d2,@d2,@d2);
set @d2 = concat(@d2,@d2,@d2,@d2,@d2,@d2,@d2,@d2,@d2,@d2);
set @d2 = concat(@d2,@d2,@d2,@d2,@d2,@d2,@d2,@d2,@d2,@d2);
select length(@x0),length(@b1),length(@d1) from dual;
length(@x0) length(@b1) length(@d1)
256 2256 3000
select length(@x0),length(@b2),length(@d2) from dual;
length(@x0) length(@b2) length(@d2)
256 20000 30000
insert into t1 values(1,@b1,111,@d1);
insert into t1 values(2,@b2,222,@d2);
commit;
explain select * from t1 where a = 1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 const PRIMARY PRIMARY 4 const #
select a,length(b),substr(b,1+2*900,2),length(d),substr(d,1+3*900,3)
from t1 where a=1;
a length(b) substr(b,1+2*900,2) length(d) substr(d,1+3*900,3)
1 2256 b1 3000 dd1
select a,length(b),substr(b,1+2*9000,2),length(d),substr(d,1+3*9000,3)
from t1 where a=2;
a length(b) substr(b,1+2*9000,2) length(d) substr(d,1+3*9000,3)
2 20000 b2 30000 dd2
update t1 set b=@b2,d=@d2 where a=1;
update t1 set b=@b1,d=@d1 where a=2;
commit;
select a,length(b),substr(b,1+2*9000,2),length(d),substr(d,1+3*9000,3)
from t1 where a=1;
a length(b) substr(b,1+2*9000,2) length(d) substr(d,1+3*9000,3)
1 20000 b2 30000 dd2
select a,length(b),substr(b,1+2*900,2),length(d),substr(d,1+3*900,3)
from t1 where a=2;
a length(b) substr(b,1+2*900,2) length(d) substr(d,1+3*900,3)
2 2256 b1 3000 dd1
update t1 set b=concat(b,b),d=concat(d,d) where a=1;
update t1 set b=concat(b,b),d=concat(d,d) where a=2;
commit;
select a,length(b),substr(b,1+4*9000,2),length(d),substr(d,1+6*9000,3)
from t1 where a=1;
a length(b) substr(b,1+4*9000,2) length(d) substr(d,1+6*9000,3)
1 40000 b2 60000 dd2
select a,length(b),substr(b,1+4*900,2),length(d),substr(d,1+6*900,3)
from t1 where a=2;
a length(b) substr(b,1+4*900,2) length(d) substr(d,1+6*900,3)
2 4512 b1 6000 dd1
update t1 set d=null where a=1;
commit;
select a from t1 where d is null;
a
1
delete from t1 where a=45567;
commit;
delete from t1 where a=1;
delete from t1 where a=2;
commit;
select count(*) from t1;
count(*)
0
replace t1 set a=1,b=@b1,c=111,d=@d1;
replace t1 set a=2,b=@b2,c=222,d=@d2;
commit;
explain select * from t1 where a = 1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 const PRIMARY PRIMARY 4 const #
select a,length(b),substr(b,1+2*900,2),length(d),substr(d,1+3*900,3)
from t1 where a=1;
a length(b) substr(b,1+2*900,2) length(d) substr(d,1+3*900,3)
1 2256 b1 3000 dd1
select a,length(b),substr(b,1+2*9000,2),length(d),substr(d,1+3*9000,3)
from t1 where a=2;
a length(b) substr(b,1+2*9000,2) length(d) substr(d,1+3*9000,3)
2 20000 b2 30000 dd2
replace t1 set a=1,b=@b2,c=111,d=@d2;
replace t1 set a=2,b=@b1,c=222,d=@d1;
commit;
select a,length(b),substr(b,1+2*9000,2),length(d),substr(d,1+3*9000,3)
from t1 where a=1;
a length(b) substr(b,1+2*9000,2) length(d) substr(d,1+3*9000,3)
1 20000 b2 30000 dd2
select a,length(b),substr(b,1+2*900,2),length(d),substr(d,1+3*900,3)
from t1 where a=2;
a length(b) substr(b,1+2*900,2) length(d) substr(d,1+3*900,3)
2 2256 b1 3000 dd1
replace t1 set a=1,b=concat(@b2,@b2),c=111,d=concat(@d2,@d2);
replace t1 set a=2,b=concat(@b1,@b1),c=222,d=concat(@d1,@d1);
commit;
select a,length(b),substr(b,1+4*9000,2),length(d),substr(d,1+6*9000,3)
from t1 where a=1;
a length(b) substr(b,1+4*9000,2) length(d) substr(d,1+6*9000,3)
1 40000 b2 60000 dd2
select a,length(b),substr(b,1+4*900,2),length(d),substr(d,1+6*900,3)
from t1 where a=2;
a length(b) substr(b,1+4*900,2) length(d) substr(d,1+6*900,3)
2 4512 b1 6000 dd1
replace t1 set a=1,b='xyz',c=111,d=null;
commit;
select a,b from t1 where d is null;
a b
1 xyz
delete from t1 where a=1;
delete from t1 where a=2;
commit;
select count(*) from t1;
count(*)
0
insert into t1 values(1,@b1,111,@d1);
insert into t1 values(2,@b2,222,@d2);
commit;
explain select * from t1 where c = 111;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref c c 4 const #
select a,length(b),substr(b,1+2*900,2),length(d),substr(d,1+3*900,3)
from t1 where c=111;
a length(b) substr(b,1+2*900,2) length(d) substr(d,1+3*900,3)
1 2256 b1 3000 dd1
select a,length(b),substr(b,1+2*9000,2),length(d),substr(d,1+3*9000,3)
from t1 where c=222;
a length(b) substr(b,1+2*9000,2) length(d) substr(d,1+3*9000,3)
2 20000 b2 30000 dd2
update t1 set b=@b2,d=@d2 where c=111;
update t1 set b=@b1,d=@d1 where c=222;
commit;
select a,length(b),substr(b,1+2*9000,2),length(d),substr(d,1+3*9000,3)
from t1 where c=111;
a length(b) substr(b,1+2*9000,2) length(d) substr(d,1+3*9000,3)
1 20000 b2 30000 dd2
select a,length(b),substr(b,1+2*900,2),length(d),substr(d,1+3*900,3)
from t1 where c=222;
a length(b) substr(b,1+2*900,2) length(d) substr(d,1+3*900,3)
2 2256 b1 3000 dd1
update t1 set d=null where c=111;
commit;
select a from t1 where d is null;
a
1
delete from t1 where c=111;
delete from t1 where c=222;
commit;
select count(*) from t1;
count(*)
0
insert into t1 values(1,'b1',111,'dd1');
insert into t1 values(2,'b2',222,'dd2');
insert into t1 values(3,'b3',333,'dd3');
insert into t1 values(4,'b4',444,'dd4');
insert into t1 values(5,'b5',555,'dd5');
insert into t1 values(6,'b6',666,'dd6');
insert into t1 values(7,'b7',777,'dd7');
insert into t1 values(8,'b8',888,'dd8');
insert into t1 values(9,'b9',999,'dd9');
commit;
explain select * from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL #
select * from t1 order by a;
a b c d
1 b1 111 dd1
2 b2 222 dd2
3 b3 333 dd3
4 b4 444 dd4
5 b5 555 dd5
6 b6 666 dd6
7 b7 777 dd7
8 b8 888 dd8
9 b9 999 dd9
update t1 set b=concat(a,'x',b),d=concat(a,'x',d);
commit;
select * from t1 order by a;
a b c d
1 1xb1 111 1xdd1
2 2xb2 222 2xdd2
3 3xb3 333 3xdd3
4 4xb4 444 4xdd4
5 5xb5 555 5xdd5
6 6xb6 666 6xdd6
7 7xb7 777 7xdd7
8 8xb8 888 8xdd8
9 9xb9 999 9xdd9
delete from t1;
commit;
select count(*) from t1;
count(*)
0
insert into t1 values(1,@b1,111,@d1);
insert into t1 values(2,@b2,222,@d2);
commit;
explain select * from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL #
select a,length(b),substr(b,1+2*900,2),length(d),substr(d,1+3*900,3)
from t1 order by a;
a length(b) substr(b,1+2*900,2) length(d) substr(d,1+3*900,3)
1 2256 b1 3000 dd1
2 20000 b2 30000 dd2
update t1 set b=concat(b,b),d=concat(d,d);
commit;
select a,length(b),substr(b,1+4*9000,2),length(d),substr(d,1+6*9000,3)
from t1 order by a;
a length(b) substr(b,1+4*9000,2) length(d) substr(d,1+6*9000,3)
1 4512 6000
2 40000 b2 60000 dd2
delete from t1;
commit;
select count(*) from t1;
count(*)
0
insert into t1 values(1,'b1',111,'dd1');
insert into t1 values(2,'b2',222,'dd2');
insert into t1 values(3,'b3',333,'dd3');
insert into t1 values(4,'b4',444,'dd4');
insert into t1 values(5,'b5',555,'dd5');
insert into t1 values(6,'b6',666,'dd6');
insert into t1 values(7,'b7',777,'dd7');
insert into t1 values(8,'b8',888,'dd8');
insert into t1 values(9,'b9',999,'dd9');
commit;
explain select * from t1 where c >= 100 order by a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range c c 4 NULL # Using where with pushed condition; Using filesort
select * from t1 where c >= 100 order by a;
a b c d
1 b1 111 dd1
2 b2 222 dd2
3 b3 333 dd3
4 b4 444 dd4
5 b5 555 dd5
6 b6 666 dd6
7 b7 777 dd7
8 b8 888 dd8
9 b9 999 dd9
update t1 set b=concat(a,'x',b),d=concat(a,'x',d)
where c >= 100;
commit;
select * from t1 where c >= 100 order by a;
a b c d
1 1xb1 111 1xdd1
2 2xb2 222 2xdd2
3 3xb3 333 3xdd3
4 4xb4 444 4xdd4
5 5xb5 555 5xdd5
6 6xb6 666 6xdd6
7 7xb7 777 7xdd7
8 8xb8 888 8xdd8
9 9xb9 999 9xdd9
delete from t1 where c >= 100;
commit;
select count(*) from t1;
count(*)
0
insert into t1 values(1,@b1,111,@d1);
insert into t1 values(2,@b2,222,@d2);
commit;
explain select * from t1 where c >= 100 order by a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index c PRIMARY 4 NULL # Using where with pushed condition
select a,length(b),substr(b,1+2*900,2),length(d),substr(d,1+3*900,3)
from t1 where c >= 100 order by a;
a length(b) substr(b,1+2*900,2) length(d) substr(d,1+3*900,3)
1 2256 b1 3000 dd1
2 20000 b2 30000 dd2
update t1 set b=concat(b,b),d=concat(d,d);
commit;
select a,length(b),substr(b,1+4*9000,2),length(d),substr(d,1+6*9000,3)
from t1 where c >= 100 order by a;
a length(b) substr(b,1+4*9000,2) length(d) substr(d,1+6*9000,3)
1 4512 6000
2 40000 b2 60000 dd2
delete from t1 where c >= 100;
commit;
select count(*) from t1;
count(*)
0
insert into t1 values(1,@b1,111,@d1);
insert into t1 values(2,@b2,222,@d2);
select a,length(b),substr(b,1+2*900,2),length(d),substr(d,1+3*900,3)
from t1 where a = 0;
a length(b) substr(b,1+2*900,2) length(d) substr(d,1+3*900,3)
select a,length(b),substr(b,1+2*900,2),length(d),substr(d,1+3*900,3)
from t1 where a = 1;
a length(b) substr(b,1+2*900,2) length(d) substr(d,1+3*900,3)
1 2256 b1 3000 dd1
select a,length(b),substr(b,1+2*900,2),length(d),substr(d,1+3*900,3)
from t1 where a = 2;
a length(b) substr(b,1+2*900,2) length(d) substr(d,1+3*900,3)
2 20000 b2 30000 dd2
select a,length(b),substr(b,1+2*900,2),length(d),substr(d,1+3*900,3)
from t1 order by a;
a length(b) substr(b,1+2*900,2) length(d) substr(d,1+3*900,3)
1 2256 b1 3000 dd1
2 20000 b2 30000 dd2
rollback;
select count(*) from t1;
count(*)
0
insert into t1 values(1,'b1',111,'dd1');
insert into t1 values(2,'b2',222,'dd2');
insert into t1 values(3,'b3',333,'dd3');
insert into t1 values(4,'b4',444,'dd4');
insert into t1 values(5,'b5',555,'dd5');
insert into t1 values(6,'b6',666,'dd6');
insert into t1 values(7,'b7',777,'dd7');
insert into t1 values(8,'b8',888,'dd8');
insert into t1 values(9,'b9',999,'dd9');
commit;
select * from t1 order by a;
a b c d
1 b1 111 dd1
2 b2 222 dd2
3 b3 333 dd3
4 b4 444 dd4
5 b5 555 dd5
6 b6 666 dd6
7 b7 777 dd7
8 b8 888 dd8
9 b9 999 dd9
alter table t1 add x int;
select * from t1 order by a;
a b c d x
1 b1 111 dd1 NULL
2 b2 222 dd2 NULL
3 b3 333 dd3 NULL
4 b4 444 dd4 NULL
5 b5 555 dd5 NULL
6 b6 666 dd6 NULL
7 b7 777 dd7 NULL
8 b8 888 dd8 NULL
9 b9 999 dd9 NULL
alter table t1 drop x;
select * from t1 order by a;
a b c d
1 b1 111 dd1
2 b2 222 dd2
3 b3 333 dd3
4 b4 444 dd4
5 b5 555 dd5
6 b6 666 dd6
7 b7 777 dd7
8 b8 888 dd8
9 b9 999 dd9
create database test2;
use test2;
CREATE TABLE t2 (
a bigint unsigned NOT NULL PRIMARY KEY,
b int unsigned not null,
c int unsigned
) engine=ndbcluster;
insert into t2 values (1,1,1),(2,2,2);
select * from test.t1,t2 where test.t1.a = t2.a order by test.t1.a;
a b c d a b c
1 b1 111 dd1 1 1 1
2 b2 222 dd2 2 2 2
drop table t2;
use test;
select * from t1 order by a;
a b c d
1 b1 111 dd1
2 b2 222 dd2
3 b3 333 dd3
4 b4 444 dd4
5 b5 555 dd5
6 b6 666 dd6
7 b7 777 dd7
8 b8 888 dd8
9 b9 999 dd9
alter table t1 add x int;
select * from t1 order by a;
a b c d x
1 b1 111 dd1 NULL
2 b2 222 dd2 NULL
3 b3 333 dd3 NULL
4 b4 444 dd4 NULL
5 b5 555 dd5 NULL
6 b6 666 dd6 NULL
7 b7 777 dd7 NULL
8 b8 888 dd8 NULL
9 b9 999 dd9 NULL
alter table t1 drop x;
select * from t1 order by a;
a b c d
1 b1 111 dd1
2 b2 222 dd2
3 b3 333 dd3
4 b4 444 dd4
5 b5 555 dd5
6 b6 666 dd6
7 b7 777 dd7
8 b8 888 dd8
9 b9 999 dd9
drop table t1;
drop database test2;
set autocommit=0;
create table t1 (
a int not null primary key,
b tinytext
) engine=ndbcluster;
insert into t1 values(1, 'x');
update t1 set b = 'y';
select * from t1;
a b
1 y
delete from t1;
select * from t1;
a b
commit;
replace t1 set a=2, b='y';
select * from t1;
a b
2 y
delete from t1;
select * from t1;
a b
drop table t1;
set autocommit=0;
create table t1 (
a int not null primary key,
b text not null
) engine=ndbcluster;
insert into t1 values(1, '');
select * from t1;
a b
1
commit;
begin;
insert into t1 values (3, repeat("w", 8000));
insert into t1 values (2, repeat("x", 10000)),
(3, repeat("y", 5000)),
(4, repeat("z", 15000));
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
rollback;
commit;
drop table t1;
set autocommit=1;
use test;
CREATE TABLE t1 (
a int,
b text,
PRIMARY KEY (a)
) ENGINE=MyISAM DEFAULT CHARSET=latin1;
INSERT INTO t1 VALUES
(1,'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA');
INSERT INTO t1 VALUES
(2,'BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB');
select * from t1 order by a;
a b
1 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
2 BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB
alter table t1 engine=ndb;
select * from t1 order by a;
a b
1 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
2 BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB
set autocommit=1;
alter table t1 engine=myisam;
select * from t1 order by a;
a b
1 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
2 BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB
drop table t1;
create table t1 (
id int(11) unsigned primary key NOT NULL auto_increment,
msg text NOT NULL
) engine=ndbcluster default charset=utf8;
insert into t1 (msg) values(
'Tries to validate (8 byte length + inline bytes) as UTF8 :(
Fast fix: removed validation for Text. It is not yet indexable
so bad data will not crash kernel.');
select * from t1;
id msg
1 Tries to validate (8 byte length + inline bytes) as UTF8 :(
Fast fix: removed validation for Text. It is not yet indexable
so bad data will not crash kernel.
drop table t1;
create table t1 (
a int primary key not null auto_increment,
b text
) engine=ndbcluster;
select count(*) from t1;
count(*)
500
truncate t1;
select count(*) from t1;
count(*)
0
drop table t1;
create table t1 (
a varchar(40) not null,
b mediumint not null,
t text,
c varchar(2) not null,
d bigint not null,
primary key (a,b,c),
key (c,a),
unique key (d)
) engine=ndb;
insert into t1 (a,b,c,d,t) values ('a',1110,'a',1,@v1);
insert into t1 (a,b,c,d,t) values ('b',1110,'a',2,@v2);
insert into t1 (a,b,c,d,t) values ('a',1110,'b',3,@v3);
insert into t1 (a,b,c,d,t) values ('b',1110,'b',4,@v4);
select a,b,c,d,sha1(t) from t1 order by c,a;
a b c d sha1(t)
a 1110 a 1 558a30713786aa72f66abc1e6a521d55aacdeeb5
b 1110 a 2 b238654911689bfb626a3ef9dba4a1ca074e6a5e
a 1110 b 3 2b6515f29c20b8e9e17cc597527e516c0de8d612
b 1110 b 4 NULL
select a,b,c,d,sha1(t) from t1 where a='a' and b=1110 and c='a';
a b c d sha1(t)
a 1110 a 1 558a30713786aa72f66abc1e6a521d55aacdeeb5
select a,b,c,d,sha1(t) from t1 where a='a' and b=1110 and c='b';
a b c d sha1(t)
a 1110 b 3 2b6515f29c20b8e9e17cc597527e516c0de8d612
update t1 set t=@v4 where a='b' and b=1110 and c='a';
update t1 set t=@v2 where a='b' and b=1110 and c='b';
select a,b,c,d,sha1(t) from t1 order by c,a;
a b c d sha1(t)
a 1110 a 1 558a30713786aa72f66abc1e6a521d55aacdeeb5
b 1110 a 2 NULL
a 1110 b 3 2b6515f29c20b8e9e17cc597527e516c0de8d612
b 1110 b 4 b238654911689bfb626a3ef9dba4a1ca074e6a5e
update t1 set t=@v2 where d=2;
update t1 set t=@v4 where d=4;
select a,b,c,d,sha1(t) from t1 order by c,a;
a b c d sha1(t)
a 1110 a 1 558a30713786aa72f66abc1e6a521d55aacdeeb5
b 1110 a 2 b238654911689bfb626a3ef9dba4a1ca074e6a5e
a 1110 b 3 2b6515f29c20b8e9e17cc597527e516c0de8d612
b 1110 b 4 NULL
update t1 set t=@v4 where a='b' and c='a';
update t1 set t=@v2 where a='b' and c='b';
select a,b,c,d,sha1(t) from t1 order by c,a;
a b c d sha1(t)
a 1110 a 1 558a30713786aa72f66abc1e6a521d55aacdeeb5
b 1110 a 2 NULL
a 1110 b 3 2b6515f29c20b8e9e17cc597527e516c0de8d612
b 1110 b 4 b238654911689bfb626a3ef9dba4a1ca074e6a5e
update t1 set t=@v2 where b+d=1112;
update t1 set t=@v4 where b+d=1114;
select a,b,c,d,sha1(t) from t1 order by c,a;
a b c d sha1(t)
a 1110 a 1 558a30713786aa72f66abc1e6a521d55aacdeeb5
b 1110 a 2 b238654911689bfb626a3ef9dba4a1ca074e6a5e
a 1110 b 3 2b6515f29c20b8e9e17cc597527e516c0de8d612
b 1110 b 4 NULL
delete from t1 where a='a' and b=1110 and c='a';
delete from t1 where a='b' and c='a';
delete from t1 where d=3;
delete from t1 where b+d=1114;
select count(*) from t1;
count(*)
0
drop table t1;
create table t1(
a int,
blob_nn blob not null,
text_nn text not null,
blob_nl blob,
text_nl text,
primary key(a)
) engine=ndb;
insert into t1(a) values (1);
Warnings:
Warning 1364 Field 'blob_nn' doesn't have a default value
Warning 1364 Field 'text_nn' doesn't have a default value
insert into t1(a, text_nl) values (2, 'MySQL Cluster NDB');
Warnings:
Warning 1364 Field 'blob_nn' doesn't have a default value
Warning 1364 Field 'text_nn' doesn't have a default value
select a, length(blob_nn), length(text_nn), blob_nl, text_nl from t1 order by a;
a length(blob_nn) length(text_nn) blob_nl text_nl
1 0 0 NULL NULL
2 0 0 NULL MySQL Cluster NDB
drop table t1;
create table `t1` (
`f1` int(11) not null default -1,
`f11` text,
unique key `i1` (`f1`)
) engine=ndbcluster default charset=utf8;
insert into `t1` values (123,null);
create table `t2` (
`f1` int(11) not null default -1,
unique key `i2` (`f1`)
) engine=ndbcluster default charset=utf8;
begin;
delete from t2 where f1=5;
delete from t1 where f1=123;
delete from t2 where f1=5;
commit;
show warnings;
Level Code Message
drop table t1;
drop table t2;
create table t1 (
a int primary key,
giga longblob)
engine=ndb;
set @stuff = '1234567890';
insert into t1 values (0, repeat(@stuff, 2000));
select sha1(repeat(@stuff, 2000));
sha1(repeat(@stuff, 2000))
c8d94eb4127361ac22cf1c8a8f1178a37fb25e41
select sha1(giga) from t1;
sha1(giga)
c8d94eb4127361ac22cf1c8a8f1178a37fb25e41
select (giga = repeat(@stuff, 2000)) from t1 where a=0;
(giga = repeat(@stuff, 2000))
1
drop table t1;
Test that automatic lock upgrade on Blobs behaves as expected
w.r.t other operations on the table.
create table t1 (a int primary key, b longblob, c int, unique(c)) engine=ndb;
insert into t1 values (1, repeat('1', 256), 1);
insert into t1 values (2, repeat('2', 2256), 2);
insert into t1 values (3, repeat('3', 4256), 3);
insert into t1 values (4, repeat('4', 8256), 4);
insert into t1 values (5, repeat('5', 20000), 5);
No Deadlock scenarios
Transaction 1 reading PK with no lock. Transaction 2 reading PK with EX lock
begin;
select a, length(b) from t1 where a=2;
a length(b)
2 2256
select a, length(b) from t1 where a=2 FOR UPDATE;
a length(b)
2 2256
Transaction 2 scanning with EX lock - will not deadlock with transaction 1
select a, length(b) from t1 ORDER BY a FOR UPDATE;
a length(b)
1 256
2 2256
3 4256
4 8256
5 20000
commit;
Transaction1 reading PK with SH lock. Transaction 2 reading PK with no lock
begin;
select a, length(b) from t1 where a=3 LOCK IN SHARE MODE;
a length(b)
3 4256
select a, length(b) from t1 where a=3;
a length(b)
3 4256
Transaction 2 scanning with SH lock - will not deadlock with transaction 1
select a, length(b) from t1 ORDER BY a;
a length(b)
1 256
2 2256
3 4256
4 8256
5 20000
commit;
Transaction1 reading PK with SH lock. Transaction 2 reading PK with SH lock
begin;
select a, length(b) from t1 where a=4 LOCK IN SHARE MODE;
a length(b)
4 8256
select a, length(b) from t1 where a=4 LOCK IN SHARE MODE;
a length(b)
4 8256
Transaction 2 scanning with SH lock - will not deadlock with transaction 1
select a, length(b) from t1 ORDER BY a LOCK IN SHARE MODE;
a length(b)
1 256
2 2256
3 4256
4 8256
5 20000
commit;
Deadlock scenarios on PK access :
Transaction 1 reading PK with EX lock. Transaction 2 reading PK with no lock
begin;
select a, length(b) from t1 where a=5 FOR UPDATE;
a length(b)
5 20000
select a, length(b) from t1 where a=5;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
commit;
Transaction 1 reading PK with EX lock. Transaction 2 reading PK with SH lock
begin;
select a, length(b) from t1 where a=1 FOR UPDATE;
a length(b)
1 256
select a, length(b) from t1 where a=1 LOCK IN SHARE MODE;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
commit;
Verify that Nolock Unique index access still deadlocks
as unique index accesses always upgrade to SH
begin;
select a, length(b) from t1 where c=2;
a length(b)
2 2256
select a, length(b) from t1 FOR UPDATE;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
commit;
drop table t1;
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