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MDEV-22021: Galera database could get inconsistent with rollback to savepoint

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When binlog is disabled, WSREP will not behave correctly when
SAVEPOINT ROLLBACK is executed and we will not rollback transaction.
This commit is contained in:
Daniele Sciascia
2020-03-16 15:03:00 +01:00
committed by Jan Lindström
parent e2f1f88fa6
commit bdcecfa22c
10 changed files with 139 additions and 25 deletions
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57
mysql-test/suite/galera/r/MDEV-22021.result Normal file
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@@ -0,0 +1,57 @@
connection node_2;
connection node_1;
CREATE TABLE t1 (f1 INTEGER PRIMARY KEY);
START TRANSACTION;
INSERT INTO t1 VALUES (1);
SAVEPOINT sp1;
INSERT INTO t1 VALUES (2);
ROLLBACK TO SAVEPOINT sp1;
COMMIT;
SELECT COUNT(*) = 1 FROM t1;
COUNT(*) = 1
1
connection node_2;
SELECT COUNT(*) = 1 FROM t1;
COUNT(*) = 1
1
connection node_1;
DELETE FROM t1;
START TRANSACTION;
SAVEPOINT sp1;
INSERT INTO t1 VALUES (1);
SAVEPOINT sp2;
INSERT INTO t1 VALUES (2);
ROLLBACK TO SAVEPOINT sp2;
ROLLBACK TO SAVEPOINT sp1;
COMMIT;
SELECT COUNT(*) = 0 FROM t1;
COUNT(*) = 0
1
connection node_2;
SELECT COUNT(*) = 0 FROM t1;
COUNT(*) = 0
1
connection node_1;
DELETE FROM t1;
START TRANSACTION;
SAVEPOINT sp1;
INSERT INTO t1 VALUES (1);
INSERT INTO t1 VALUES (2);
INSERT INTO t1 VALUES (3);
INSERT INTO t1 VALUES (4);
SAVEPOINT sp2;
INSERT INTO t1 VALUES (5);
ROLLBACK TO SAVEPOINT sp2;
INSERT INTO t1 VALUES (6);
INSERT INTO t1 VALUES (7);
ROLLBACK TO SAVEPOINT sp1;
INSERT INTO t1 VALUES (8);
COMMIT;
SELECT COUNT(*) = 1 FROM t1;
COUNT(*) = 1
1
connection node_2;
SELECT COUNT(*) = 1 FROM t1;
COUNT(*) = 1
1
DROP TABLE t1;

4
mysql-test/suite/galera/t/MDEV-22021.combinations Normal file
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@@ -0,0 +1,4 @@
[binlogoff]
[binlogon]
log-bin

60
mysql-test/suite/galera/t/MDEV-22021.test Normal file
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@@ -0,0 +1,60 @@
#
# SAVEPOINT ROLLBACK can introduce inconsistency in cluster.
#
--source include/galera_cluster.inc
CREATE TABLE t1 (f1 INTEGER PRIMARY KEY);
START TRANSACTION;
INSERT INTO t1 VALUES (1);
SAVEPOINT sp1;
INSERT INTO t1 VALUES (2);
ROLLBACK TO SAVEPOINT sp1;
COMMIT;
SELECT COUNT(*) = 1 FROM t1;
--connection node_2
SELECT COUNT(*) = 1 FROM t1;
--connection node_1
DELETE FROM t1;
START TRANSACTION;
SAVEPOINT sp1;
INSERT INTO t1 VALUES (1);
SAVEPOINT sp2;
INSERT INTO t1 VALUES (2);
ROLLBACK TO SAVEPOINT sp2;
ROLLBACK TO SAVEPOINT sp1;
COMMIT;
SELECT COUNT(*) = 0 FROM t1;
--connection node_2
SELECT COUNT(*) = 0 FROM t1;
--connection node_1
DELETE FROM t1;
START TRANSACTION;
SAVEPOINT sp1;
INSERT INTO t1 VALUES (1);
INSERT INTO t1 VALUES (2);
INSERT INTO t1 VALUES (3);
INSERT INTO t1 VALUES (4);
SAVEPOINT sp2;
INSERT INTO t1 VALUES (5);
ROLLBACK TO SAVEPOINT sp2;
INSERT INTO t1 VALUES (6);
INSERT INTO t1 VALUES (7);
ROLLBACK TO SAVEPOINT sp1;
INSERT INTO t1 VALUES (8);
COMMIT;
SELECT COUNT(*) = 1 FROM t1;
--connection node_2
SELECT COUNT(*) = 1 FROM t1;
DROP TABLE t1;

6
mysql-test/suite/galera_sr/r/GCF-571.result
View File

@@ -24,7 +24,7 @@ COUNT(*) > 0
1
SELECT COUNT(*) = 1 FROM mysql.wsrep_streaming_log WHERE frag LIKE '%SAVEPOINT `A`%';
COUNT(*) = 1
0
1
connection node_1;
ROLLBACK TO SAVEPOINT A;
connection node_1a;
@@ -36,7 +36,7 @@ COUNT(*) > 0
1
SELECT COUNT(*) = 1 FROM mysql.wsrep_streaming_log WHERE frag LIKE '%SAVEPOINT `A`%';
COUNT(*) = 1
0
1
SELECT COUNT(*) = 1 FROM mysql.wsrep_streaming_log WHERE frag LIKE '%ROLLBACK TO `A`%';
COUNT(*) = 1
0
@@ -49,7 +49,7 @@ COUNT(*) > 0
1
SELECT COUNT(*) = 1 FROM mysql.wsrep_streaming_log WHERE frag LIKE '%SAVEPOINT `A`%';
COUNT(*) = 1
0
1
SELECT COUNT(*) = 1 FROM mysql.wsrep_streaming_log WHERE frag LIKE '%ROLLBACK TO `A`%';
COUNT(*) = 1
0

2
mysql-test/suite/galera_sr/r/GCF-620.result
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@@ -14,5 +14,5 @@ COMMIT;
connection node_2;
SELECT COUNT(*) = 2 FROM t1;
COUNT(*) = 2
0
1
DROP TABLE t1;

2
mysql-test/suite/galera_sr/r/galera_sr_rollback_savepoint.result
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@@ -33,7 +33,7 @@ COUNT(*) = 5
1
SELECT COUNT(*) = 0 FROM t1 WHERE f2 = 'b';
COUNT(*) = 0
0
1
SELECT COUNT(*) = 5 FROM t1 WHERE f2 = 'c';
COUNT(*) = 5
1

2
mysql-test/suite/galera_sr/r/mysql-wsrep-features#22.result
View File

@@ -31,5 +31,5 @@ COUNT(*) = 6
connection node_2;
SELECT COUNT(*) = 6 FROM t1;
COUNT(*) = 6
0
1
DROP TABLE t1;