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# # Additional tests for wsrep_dirty_reads # --source include/galera_cluster.inc --source include/have_innodb.inc --let $galera_connection_name = node_3 --let $galera_server_number = 3 --source include/galera_connect.inc # Save original auto_increment_offset values. --let $node_1=node_1 --let $node_2=node_2 --let $node_3=node_3 --source ../galera/include/auto_increment_offset_save.inc --connection node_1 CREATE TABLE t1 (f1 INTEGER) ENGINE=INNODB; INSERT INTO t1 VALUES (1); --connection node_2 --let $wait_condition = SELECT COUNT(*) = 1 FROM t1; --source include/wait_condition.inc SET GLOBAL wsrep_provider_options='gmcast.isolate=1'; --connection node_1 --let $wait_condition = SELECT VARIABLE_VALUE = 2 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size'; --source include/wait_condition.inc --connection node_2 SET SESSION wsrep_sync_wait = 0; --let $wait_condition = SELECT VARIABLE_VALUE = 'non-Primary' FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_status'; --source include/wait_condition.inc SET SESSION wsrep_dirty_reads = 1; # Those statements should succeed --error 0 SELECT f1 FROM t1; --error 0 USE test; --error 0 SHOW CREATE TABLE t1; --error 0 LOCK TABLE t1 WRITE; --error 0 UNLOCK TABLES; --error 0 FLUSH TABLES WITH READ LOCK; --error 0 UNLOCK TABLES; --error 0 PREPARE stmt_select FROM 'SELECT f1 FROM t1'; --error 0 EXECUTE stmt_select; --error 0 PREPARE stmt_update FROM 'UPDATE t1 SET f1 = f1 + f1'; # Mysqldump should succeed SET GLOBAL wsrep_dirty_reads = 1; SET GLOBAL wsrep_sync_wait = 0; --error 0 --exec $MYSQL_DUMP -u root -S $NODE_MYSOCK_2 test >/dev/null SET GLOBAL wsrep_dirty_reads = 0; SET GLOBAL wsrep_sync_wait = 15; # Those statements should fail SET SESSION wsrep_dirty_reads = 1; --error ER_UNKNOWN_COM_ERROR INSERT INTO t1 SELECT * FROM t1; --error ER_UNKNOWN_COM_ERROR DELETE FROM t1; --error ER_UNKNOWN_COM_ERROR UPDATE t1 SET f1 = f1 + 1; --error ER_UNKNOWN_COM_ERROR DROP TABLE t1; --error ER_UNKNOWN_COM_ERROR EXECUTE stmt_update; # With wsrep_dirty_reads = 0 , even SELECTS are not allowed SET SESSION wsrep_dirty_reads = 0; --error ER_UNKNOWN_COM_ERROR SELECT * FROM t1; --error ER_UNKNOWN_COM_ERROR EXECUTE stmt_select; # But reads from INFORMATION_SCHEMA are allowed --error 0 SELECT COUNT(*) > 0 FROM INFORMATION_SCHEMA.PROCESSLIST; # Restore cluster SET GLOBAL wsrep_provider_options='gmcast.isolate=0'; --source include/galera_wait_ready.inc --connection node_1 --let $wait_condition = SELECT VARIABLE_VALUE = 3 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size'; --source include/wait_condition.inc --connection node_2 --let $wait_condition = SELECT VARIABLE_VALUE = 3 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size'; --source include/wait_condition.inc --source include/galera_wait_ready.inc DROP TABLE t1; # Restore original auto_increment_offset values. --source ../galera/include/auto_increment_offset_restore.inc