ndb_lock.result

来自「视频监控网络部分的协议ddns,的模块的实现代码,请大家大胆指正.」· RESULT 代码 · 共 190 行

DROP TABLE IF EXISTS t1,t2,t3,t4,t5,t6,t7;
create table t1 (x integer not null primary key, y varchar(32)) engine = ndb;
insert into t1 values (1,'one'), (2,'two');
select * from t1 order by x;
x	y
1	one
2	two
select * from t1 order by x;
x	y
1	one
2	two
start transaction;
insert into t1 values (3,'three');
select * from t1 order by x;
x	y
1	one
2	two
3	three
start transaction;
select * from t1 order by x;
x	y
1	one
2	two
commit;
select * from t1 order by x;
x	y
1	one
2	two
3	three
commit;
drop table t1;
create table t1 (pk integer not null primary key, u int not null, o int not null, 
unique(u), key(o)) engine = ndb;
insert into t1 values (1,1,1), (2,2,2), (3,3,3), (4,4,4), (5,5,5);
lock tables t1 write;
delete from t1 where pk = 1;
unlock tables;
select * from t1 order by pk;
pk	u	o
2	2	2
3	3	3
4	4	4
5	5	5
insert into t1 values (1,1,1);
lock tables t1 write;
delete from t1 where u = 1;
unlock tables;
select * from t1 order by pk;
pk	u	o
2	2	2
3	3	3
4	4	4
5	5	5
insert into t1 values (1,1,1);
lock tables t1 write;
delete from t1 where o = 1;
unlock tables;
select * from t1 order by pk;
pk	u	o
2	2	2
3	3	3
4	4	4
5	5	5
insert into t1 values (1,1,1);
drop table t1;
create table t1 (x integer not null primary key, y varchar(32), z integer, key(z)) engine = ndb;
insert into t1 values (1,'one',1);
begin;
select * from t1 where x = 1 for update;
x	y	z
1	one	1
begin;
select * from t1 where x = 1 for update;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
rollback;
rollback;
insert into t1 values (2,'two',2),(3,"three",3);
begin;
select * from t1 where x = 1 for update;
x	y	z
1	one	1
select * from t1 where x = 1 for update;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
select * from t1 where x = 2 for update;
x	y	z
2	two	2
rollback;
commit;
begin;
select * from t1 where y = 'one' or y = 'three' for update;
x	y	z
#	#	#
#	#	#
begin;
select * from t1 where x = 2 for update;
x	y	z
2	two	2
select * from t1 where x = 1 for update;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
rollback;
commit;
begin;
select * from t1 where y = 'one' or y = 'three' order by x for update;
x	y	z
1	one	1
3	three	3
begin;
select * from t1 where x = 2 for update;
x	y	z
2	two	2
select * from t1 where x = 1 for update;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
rollback;
commit;
begin;
select * from t1 where z > 1 and z < 3 for update;
x	y	z
2	two	2
begin;
select * from t1 where x = 1 for update;
x	y	z
1	one	1
select * from t1 where x = 2 for update;
Got one of the listed errors
rollback;
commit;
begin;
select * from t1 where x = 1 lock in share mode;
x	y	z
1	one	1
begin;
select * from t1 where x = 1 lock in share mode;
x	y	z
1	one	1
select * from t1 where x = 2 for update;
x	y	z
2	two	2
select * from t1 where x = 1 for update;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
rollback;
commit;
begin;
select * from t1 where y = 'one' or y = 'three' lock in share mode;
x	y	z
#	#	#
#	#	#
begin;
select * from t1 where y = 'one' lock in share mode;
x	y	z
1	one	1
select * from t1 where x = 2 for update;
x	y	z
2	two	2
select * from t1 where x = 1 for update;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
rollback;
commit;
begin;
select * from t1 where y = 'one' or y = 'three' order by x lock in share mode;
x	y	z
1	one	1
3	three	3
begin;
select * from t1 where y = 'one' lock in share mode;
x	y	z
1	one	1
select * from t1 where x = 2 for update;
x	y	z
2	two	2
select * from t1 where x = 1 for update;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
rollback;
commit;
begin;
select * from t1 where z > 1 and z < 3 lock in share mode;
x	y	z
2	two	2
begin;
select * from t1 where z = 1 lock in share mode;
x	y	z
1	one	1
select * from t1 where x = 1 for update;
x	y	z
1	one	1
select * from t1 where x = 2 for update;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
rollback;
commit;
drop table t1;