connection node_2;
connection node_1;
connection node_1;
CREATE TABLE t1 (f1 INTEGER PRIMARY KEY, f2 INTEGER) ENGINE=InnoDB;
SET SESSION wsrep_trx_fragment_size = 1 ;
SET AUTOCOMMIT=OFF;
START TRANSACTION;
INSERT INTO t1 VALUES (1 , 1 );
INSERT INTO t1 VALUES (2 , 2 );
INSERT INTO t1 VALUES (3 , 3 );
INSERT INTO t1 VALUES (4 , 4 );
INSERT INTO t1 VALUES (5 , 5 );
connection node_2;
SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
SELECT COUNT(*) AS EXPECT_5 FROM mysql.wsrep_streaming_log;
EXPECT_5
5
ALTER TABLE t1 DROP COLUMN f2;
SELECT COUNT(*) AS EXPECT_0 FROM t1;
EXPECT_0
0
SELECT COUNT(*) AS EXPECT_0 FROM mysql.wsrep_streaming_log;
EXPECT_0
0
connection node_1;
INSERT INTO t1 VALUES (6 , 6 );
ERROR 40001 : Deadlock found when trying to get lock; try restarting transaction
SELECT COUNT(*) AS EXPECT_0 FROM mysql.wsrep_streaming_log;
EXPECT_0
0
INSERT INTO t1 VALUES (6 , 6 );
ERROR 21 S01: Column count doesn't match value count at row 1
START TRANSACTION;
INSERT INTO t1 VALUES (1 );
INSERT INTO t1 VALUES (2 );
INSERT INTO t1 VALUES (3 );
INSERT INTO t1 VALUES (4 );
INSERT INTO t1 VALUES (5 );
connection node_2;
SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
connection node_1;
COMMIT;
connection node_2;
set global wsrep_sync_wait=15 ;
SET SESSION TRANSACTION ISOLATION LEVEL REPEATABLE READ;
SELECT COUNT(*) AS EXPECT_5 FROM t1;
EXPECT_5
5
SELECT COUNT(*) AS EXPECT_0 FROM mysql.wsrep_streaming_log;
EXPECT_0
0
DROP TABLE t1;
Messung V0.5 in Prozent C=25 H=100 G=72
¤ Dauer der Verarbeitung: 0.1 Sekunden
(vorverarbeitet am 2026-10-08)
¤
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