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1a6f470464
The transaction isolation levels READ COMMITTED and READ UNCOMMITTED should behave similarly to the old deprecated setting innodb_locks_unsafe_for_binlog=1, that is, avoid acquiring gap locks. row_search_mvcc(): Reduce the scope of some variables, and clean up the initialization and use of the variable set_also_gap_locks.
195 lines
5.8 KiB
Text
195 lines
5.8 KiB
Text
SET @save_timeout = @@GLOBAL.innodb_lock_wait_timeout;
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SET GLOBAL innodb_lock_wait_timeout = 1;
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SET @save_isolation = @@GLOBAL.tx_isolation;
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SET GLOBAL TRANSACTION ISOLATION LEVEL READ COMMITTED;
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drop table if exists t1,t2,t3,t4,t5,t6,t7,t8,t9,t10;
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create table t1 (id int not null, f_id int not null, f int not null,
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primary key(f_id, id)) engine = InnoDB;
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create table t2 (id int not null,s_id int not null,s varchar(200),
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primary key(id)) engine = InnoDB;
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INSERT INTO t1 VALUES (8, 1, 3);
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INSERT INTO t1 VALUES (1, 2, 1);
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INSERT INTO t2 VALUES (1, 0, '');
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INSERT INTO t2 VALUES (8, 1, '');
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commit;
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DELETE ml.* FROM t1 AS ml LEFT JOIN t2 AS mm ON (mm.id=ml.id)
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WHERE mm.id IS NULL;
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select ml.* from t1 as ml left join t2 as mm on (mm.id=ml.id)
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where mm.id is null lock in share mode;
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id f_id f
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drop table t1,t2;
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connect a,localhost,root,,;
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connect b,localhost,root,,;
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connection a;
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create table t1(a int not null, b int, primary key(a)) engine = InnoDB;
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insert into t1 values(1,1),(2,2),(3,1),(4,2),(5,1),(6,2),(7,3);
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commit;
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set autocommit = 0;
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select * from t1 lock in share mode;
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a b
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1 1
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2 2
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3 1
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4 2
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5 1
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6 2
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7 3
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update t1 set b = 5 where b = 1;
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connection b;
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set autocommit = 0;
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select * from t1 where a = 2 and b = 2 for update;
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ERROR HY000: Lock wait timeout exceeded; try restarting transaction
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connection a;
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commit;
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connection b;
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commit;
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drop table t1;
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connection default;
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disconnect a;
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disconnect b;
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connect a,localhost,root,,;
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connect b,localhost,root,,;
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connection a;
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create table t1(a int not null, b int, primary key(a)) engine = InnoDB;
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insert into t1 values(1,1),(2,2),(3,1),(4,2),(5,1),(6,2),(7,3);
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commit;
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set autocommit = 0;
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update t1 set b = 5 where b = 1;
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connection b;
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set autocommit = 0;
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select * from t1 where a = 7 and b = 3 for update;
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a b
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7 3
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commit;
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connection a;
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commit;
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drop table t1;
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connection default;
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disconnect a;
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disconnect b;
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connect a,localhost,root,,;
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connect b,localhost,root,,;
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connection a;
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create table t1(a int not null, b int, primary key(a)) engine = InnoDB;
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insert into t1 values (1,2),(5,3),(4,2);
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create table t2(d int not null, e int, primary key(d)) engine = InnoDB;
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insert into t2 values (8,6),(12,1),(3,1);
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commit;
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set autocommit = 0;
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select * from t2 for update;
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d e
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3 1
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8 6
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12 1
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connection b;
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set autocommit = 0;
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insert into t1 select * from t2;
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update t1 set b = (select e from t2 where a = d);
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create table t3(d int not null, e int, primary key(d)) engine = InnoDB
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select * from t2;
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commit;
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connection a;
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commit;
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connection default;
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disconnect a;
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disconnect b;
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drop table t1, t2, t3;
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connect a,localhost,root,,;
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connect b,localhost,root,,;
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connect c,localhost,root,,;
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connect d,localhost,root,,;
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SET SESSION STORAGE_ENGINE = InnoDB;
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connect e,localhost,root,,;
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connect f,localhost,root,,;
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connect g,localhost,root,,;
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SET SESSION STORAGE_ENGINE = InnoDB;
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connect h,localhost,root,,;
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connect i,localhost,root,,;
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connect j,localhost,root,,;
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SET SESSION STORAGE_ENGINE = InnoDB;
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connection a;
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create table t1(a int not null, b int, primary key(a)) engine = InnoDB;
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insert into t1 values (1,2),(5,3),(4,2);
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create table t2(a int not null, b int, primary key(a)) engine = InnoDB;
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insert into t2 values (8,6),(12,1),(3,1);
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create table t3(d int not null, b int, primary key(d)) engine = InnoDB;
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insert into t3 values (8,6),(12,1),(3,1);
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create table t5(a int not null, b int, primary key(a)) engine = InnoDB;
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insert into t5 values (1,2),(5,3),(4,2);
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create table t6(d int not null, e int, primary key(d)) engine = InnoDB;
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insert into t6 values (8,6),(12,1),(3,1);
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create table t8(a int not null, b int, primary key(a)) engine = InnoDB;
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insert into t8 values (1,2),(5,3),(4,2);
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create table t9(d int not null, e int, primary key(d)) engine = InnoDB;
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insert into t9 values (8,6),(12,1),(3,1);
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commit;
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set autocommit = 0;
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select * from t2 for update;
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a b
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3 1
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8 6
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12 1
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connection b;
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set autocommit = 0;
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SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE;
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insert into t1 select * from t2;
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connection c;
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set autocommit = 0;
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SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE;
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update t3 set b = (select b from t2 where a = d);
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connection d;
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set autocommit = 0;
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SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE;
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create table t4(a int not null, b int, primary key(a)) select * from t2;
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connection e;
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set autocommit = 0;
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insert into t5 (select * from t2 lock in share mode);
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connection f;
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set autocommit = 0;
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update t6 set e = (select b from t2 where a = d lock in share mode);
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connection g;
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set autocommit = 0;
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create table t7(a int not null, b int, primary key(a)) select * from t2 lock in share mode;
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connection h;
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set autocommit = 0;
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insert into t8 (select * from t2 for update);
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connection i;
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set autocommit = 0;
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update t9 set e = (select b from t2 where a = d for update);
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connection j;
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set autocommit = 0;
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create table t10(a int not null, b int, primary key(a)) select * from t2 for update;
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connection b;
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ERROR HY000: Lock wait timeout exceeded; try restarting transaction
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connection c;
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ERROR HY000: Lock wait timeout exceeded; try restarting transaction
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connection d;
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ERROR HY000: Lock wait timeout exceeded; try restarting transaction
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connection e;
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ERROR HY000: Lock wait timeout exceeded; try restarting transaction
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connection f;
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ERROR HY000: Lock wait timeout exceeded; try restarting transaction
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connection g;
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ERROR HY000: Lock wait timeout exceeded; try restarting transaction
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connection h;
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ERROR HY000: Lock wait timeout exceeded; try restarting transaction
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connection i;
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ERROR HY000: Lock wait timeout exceeded; try restarting transaction
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connection j;
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ERROR HY000: Lock wait timeout exceeded; try restarting transaction
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connection a;
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commit;
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connection default;
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disconnect a;
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disconnect b;
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disconnect c;
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disconnect d;
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disconnect e;
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disconnect f;
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disconnect g;
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disconnect h;
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disconnect i;
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disconnect j;
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drop table t1, t2, t3, t5, t6, t8, t9;
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SET GLOBAL innodb_lock_wait_timeout = @save_timeout;
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SET GLOBAL tx_isolation = @save_isolation;
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