ndb_lock.result
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:1k
- 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;