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branches/5.1: Make

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SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED
a true replacement of SET GLOBAL INNODB_LOCKS_UNSAFE_FOR_BINLOG=1.
This fixes an error that was introduced in r370, causing
semi-consistent read not to not unlock rows in READ COMMITTED mode.
(Bug #41671, Issue #146)

rb://67 approved by Heikki Tuuri
This commit is contained in:
marko
2008-12-22 14:05:19 +00:00
parent 9a4e156082
commit 85d7d1609a
5 changed files with 15 additions and 9 deletions
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2
mysql-test/innodb-semi-consistent-master.opt
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@ -1 +1 @@
--innodb_locks_unsafe_for_binlog=true --innodb_lock_wait_timeout=2
--innodb_lock_wait_timeout=2

5
mysql-test/innodb-semi-consistent.result
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@ -1,6 +1,6 @@
drop table if exists t1;
set binlog_format=mixed;
set session transaction isolation level read committed;
set session transaction isolation level repeatable read;
create table t1(a int not null) engine=innodb DEFAULT CHARSET=latin1;
insert into t1 values (1),(2),(3),(4),(5),(6),(7);
set autocommit=0;
@ -8,11 +8,12 @@ select * from t1 where a=3 lock in share mode;
a
3
set binlog_format=mixed;
set session transaction isolation level read committed;
set session transaction isolation level repeatable read;
set autocommit=0;
update t1 set a=10 where a=5;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
commit;
set session transaction isolation level read committed;
update t1 set a=10 where a=5;
select * from t1 where a=2 for update;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction

7
mysql-test/innodb-semi-consistent.test
View File

@ -11,7 +11,7 @@ connect (a,localhost,root,,);
connect (b,localhost,root,,);
connection a;
set binlog_format=mixed;
set session transaction isolation level read committed;
set session transaction isolation level repeatable read;
create table t1(a int not null) engine=innodb DEFAULT CHARSET=latin1;
insert into t1 values (1),(2),(3),(4),(5),(6),(7);
set autocommit=0;
@ -19,13 +19,15 @@ set autocommit=0;
select * from t1 where a=3 lock in share mode;
connection b;
set binlog_format=mixed;
set session transaction isolation level read committed;
set session transaction isolation level repeatable read;
set autocommit=0;
-- error ER_LOCK_WAIT_TIMEOUT
update t1 set a=10 where a=5;
connection a;
commit;
connection b;
# perform a semi-consisent read (and unlock non-matching rows)
set session transaction isolation level read committed;
update t1 set a=10 where a=5;
connection a;
-- error ER_LOCK_WAIT_TIMEOUT
@ -33,6 +35,7 @@ select * from t1 where a=2 for update;
# this should lock the records (1),(2)
select * from t1 where a=2 limit 1 for update;
connection b;
# semi-consistent read will skip non-matching locked rows a=1, a=2
update t1 set a=11 where a=6;
-- error ER_LOCK_WAIT_TIMEOUT
update t1 set a=12 where a=2;