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b1b2689f17
This patch changes statement rollback for streaming replication. Previously, a statement rollback was turned into full transaction rollback in the case where the transaction had already replicated a fragment. This was introduced in the initial implementation of streaming replication due to the fact that we do not have a mechanism to perform a statement rollback on the applying side. This policy is however overly pessimistic, causing full rollbacks even in cases where a local statement rollback, would not require a statement rollback on the applying side. This happens to be case when the statement itself has not replicated any fragments. So the patch changes the condition that determines if a statement rollback should be turned into a full rollback accordingly. Reviewed-by: Jan Lindström <jan.lindstrom@mariadb.com>
78 lines
972 B
Text
78 lines
972 B
Text
connection node_2;
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connection node_1;
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CREATE TABLE t1 (f1 INTEGER PRIMARY KEY) ENGINE=InnoDB;
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connection node_1;
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SET SESSION wsrep_trx_fragment_size=1;
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SET AUTOCOMMIT=OFF;
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START TRANSACTION;
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INSERT INTO t1 VALUES (1),(2),(3),(4),(5),(6),(7),(8),(9),(10);
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connection node_2;
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SET SESSION wsrep_trx_fragment_size=1;
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SET AUTOCOMMIT=OFF;
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START TRANSACTION;
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INSERT INTO t1 VALUES (11),(12),(13),(14),(15),(16),(17),(18),(19),(20);
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INSERT INTO t1 VALUES (11),(12),(13),(14),(15),(16),(17),(18),(19),(20);
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ERROR 23000: Duplicate entry '11' for key 'PRIMARY'
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INSERT INTO t1 VALUES (31),(32),(33);
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SELECT COUNT(*) = 0 FROM mysql.wsrep_streaming_log;
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COUNT(*) = 0
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0
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connection node_1;
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SELECT COUNT(*) = 0 FROM mysql.wsrep_streaming_log;
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COUNT(*) = 0
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0
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COMMIT;
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connection node_2;
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COMMIT;
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SELECT * FROM t1;
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f1
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1
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2
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3
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4
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5
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11
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15
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16
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17
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18
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19
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20
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31
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32
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33
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connection node_1;
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SELECT * FROM t1;
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f1
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1
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2
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3
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4
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5
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6
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7
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8
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9
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10
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11
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12
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13
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14
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15
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16
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17
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18
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19
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20
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31
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32
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33
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DROP TABLE t1;
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