1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
connect con1, localhost, root;
CREATE TABLE t(a INT PRIMARY KEY) ENGINE=InnoDB;
INSERT INTO t VALUES(1);
BEGIN;
INSERT INTO t VALUES(2);
DELETE FROM t WHERE a=2;
connection default;
# Normal MariaDB shutdown would roll back the above transaction.
# We want the transaction to remain open, so we will kill the server
# after ensuring that any non-transactional files are clean.
FLUSH TABLES;
# Ensure that the above incomplete transaction becomes durable.
SET GLOBAL innodb_flush_log_at_trx_commit=1;
BEGIN;
INSERT INTO t VALUES(0);
ROLLBACK;
# restart: --innodb-force-recovery=3
disconnect con1;
SELECT * FROM t;
a
1
SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
SELECT * FROM t;
a
1
UPDATE t SET a=3 WHERE a=1;
# restart: --innodb-read-only
# Starting with MariaDB 10.2, innodb_read_only implies READ UNCOMMITTED.
# In earlier versions, this would return the last committed version
# (empty table)!
SELECT * FROM t;
a
3
SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
SELECT * FROM t;
a
3
SET GLOBAL innodb_max_purge_lag_wait=0;
# restart
SELECT * FROM t;
a
3
DROP TABLE t;
FOUND 1 /Rolled back recovered transaction [^0]/ in mysqld.1.err
|
