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Set an error code when a deadlock occurs in semi-consistent read. (Bug #31494)

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innodb-semi-consistent: New tests for InnoDB semi-consistent reads.
Unfortunately, these will not trigger Bug #31494, because there merely
occur lock wait timeouts, not deadlocks.
This commit is contained in:
marko 2007-10-17 05:36:42 +00:00
parent 96fc36b9cf
commit 62e98cd050
4 changed files with 84 additions and 0 deletions
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1
mysql-test/innodb-semi-consistent-master.opt Normal file
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@ -0,0 +1 @@
--innodb_locks_unsafe_for_binlog=true --innodb_lock_wait_timeout=2

36
mysql-test/innodb-semi-consistent.result Normal file
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@ -0,0 +1,36 @@
set session transaction isolation level read committed;
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;
select * from t1 where a=3 lock in share mode;
a
3
set session transaction isolation level read committed;
set autocommit=0;
update t1 set a=10 where a=5;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
commit;
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
select * from t1 where a=2 limit 1 for update;
a
2
update t1 set a=11 where a=6;
update t1 set a=12 where a=2;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
update t1 set a=13 where a=1;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
commit;
update t1 set a=14 where a=1;
commit;
select * from t1;
a
14
2
3
4
10
11
7
drop table t1;

46
mysql-test/innodb-semi-consistent.test Normal file
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@ -0,0 +1,46 @@
-- source include/not_embedded.inc
-- source include/have_innodb.inc
# basic tests of semi-consistent reads
connect (a,localhost,root,,);
connect (b,localhost,root,,);
connection a;
set session transaction isolation level read committed;
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;
# this should lock the entire table
select * from t1 where a=3 lock in share mode;
connection b;
set session transaction isolation level read committed;
set autocommit=0;
-- error ER_LOCK_WAIT_TIMEOUT
update t1 set a=10 where a=5;
connection a;
commit;
connection b;
update t1 set a=10 where a=5;
connection a;
-- error ER_LOCK_WAIT_TIMEOUT
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;
update t1 set a=11 where a=6;
-- error ER_LOCK_WAIT_TIMEOUT
update t1 set a=12 where a=2;
-- error ER_LOCK_WAIT_TIMEOUT
update t1 set a=13 where a=1;
connection a;
commit;
connection b;
update t1 set a=14 where a=1;
commit;
connection a;
select * from t1;
drop table t1;
connection default;
disconnect a;
disconnect b;

1
row/row0sel.c
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@ -4003,6 +4003,7 @@ no_gap_lock:
mutex_enter(&kernel_mutex);
if (trx->was_chosen_as_deadlock_victim) {
mutex_exit(&kernel_mutex);
err = DB_DEADLOCK;
goto lock_wait_or_error;
}