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--source include/galera_cluster.inc --source include/have_innodb.inc # # Test the effect of DDL on a concurrent SR transaction # --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; --let $wait_condition = SELECT COUNT(*) > 0 FROM t1; --source include/wait_condition.inc SELECT COUNT(*) > 0 FROM mysql.wsrep_streaming_log; ALTER TABLE t1 DROP COLUMN f2; # SR applied before the DDL is no longer visible SELECT COUNT(*) = 0 FROM t1; SELECT COUNT(*) = 0 FROM mysql.wsrep_streaming_log; --connection node_1 # Transaction can not continue due to DDL, implicit ROLLBACK --error ER_LOCK_DEADLOCK INSERT INTO t1 VALUES (6, 6); SELECT COUNT(*) = 0 FROM mysql.wsrep_streaming_log; # DDL is now in effect --error ER_WRONG_VALUE_COUNT_ON_ROW INSERT INTO t1 VALUES (6, 6); # But it should be possible to reissue the transaction 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; --let $wait_condition = SELECT COUNT(*) > 0 FROM t1; --source include/wait_condition.inc --connection node_1 COMMIT; --connection node_2 SELECT COUNT(*) = 5 FROM t1; SELECT COUNT(*) = 0 FROM mysql.wsrep_streaming_log; DROP TABLE t1;