mariadb/mysql-test/suite/galera/t/galera_var_dirty_reads.test

#
# Check the handling of @@wsrep_dirty_reads
#

--source include/galera_cluster.inc
--source include/have_innodb.inc

# Save original auto_increment_offset values.
--let $node_1=node_1
--let $node_2=node_2
--source include/auto_increment_offset_save.inc

--connection node_2
--let $wsrep_cluster_address_saved = `SELECT @@global.wsrep_cluster_address`

CREATE TABLE t1(i INT) ENGINE=INNODB;
INSERT INTO t1 VALUES(1);
SELECT * FROM t1;

create user user1;
grant all privileges on *.* to user1;
create user user2;
grant all privileges on *.* to user2;

SET @@global.wsrep_cluster_address = '';
SET @@session.wsrep_dirty_reads=OFF;

# Set wsrep_sync_wait to avoid ER_LOCK_WAIT_TIMEOUT (MDEV-6832).
SET SESSION wsrep_sync_wait=0;

# Must return 'OFF'
SHOW STATUS LIKE 'wsrep_ready';

# Must return 'Non-primary'
SHOW STATUS LIKE 'wsrep_cluster_status';

--error ER_UNKNOWN_COM_ERROR
SELECT * FROM t1;

#Select query which does not access table should be allowed MDEV-11016
SELECT @@wsrep_dirty_reads;
SELECT 2;
SELECT 2+2 FROM DUAL;

SET @@session.wsrep_dirty_reads=ON;

SELECT * FROM t1;

--enable_connect_log
--connect (con1, localhost, user1,,test,$NODE_MYPORT_2,$NODE_MYSOCK_2)
#Just test the session behavior
SET SESSION wsrep_sync_wait=0;

set session wsrep_dirty_reads=1;
#Prepared statement creation should be allowed MDEV-11479
prepare stmt_show from 'select 1';
prepare stmt_select from 'select * from t1';
prepare stmt_insert from 'insert into t1 values(1)';
set session wsrep_dirty_reads=0;

#No Preapare stmt/proceure will be allowed
--error ER_UNKNOWN_COM_ERROR
execute stmt_show;
--error ER_UNKNOWN_COM_ERROR
execute stmt_select;
--error ER_UNKNOWN_COM_ERROR
execute stmt_insert;

SET wsrep_dirty_reads=ON;
select @@session.wsrep_dirty_reads;
#Only prepare statement which does not change data should be allowed
execute stmt_show;
execute stmt_select;
--error ER_UNKNOWN_COM_ERROR
execute stmt_insert;
SET @@global.wsrep_dirty_reads=ON;

--connect (con2, localhost, user2,,test,$NODE_MYPORT_2,$NODE_MYSOCK_2)
#Just test the session behavior
select @@session.wsrep_dirty_reads;

prepare stmt_show from 'select 1';
prepare stmt_select from 'select * from t1';
prepare stmt_insert from 'insert into t1 values(1)';

#Only prepare statement which does not change data should be allowed
execute stmt_show;
execute stmt_select;
--error ER_UNKNOWN_COM_ERROR
execute stmt_insert;

#wsrep_dirty_read should work when wsrep_sync_wait is 1 or non zero
#because we already are disconnected , So It does not make any sense
#to wait for other nodes
SET SESSION wsrep_sync_wait=1;
execute stmt_show;
execute stmt_select;
--error ER_UNKNOWN_COM_ERROR
execute stmt_insert;

SET SESSION wsrep_sync_wait=7;
execute stmt_show;
execute stmt_select;
--error ER_UNKNOWN_COM_ERROR
execute stmt_insert;

--connection node_2
SET @@global.wsrep_dirty_reads=OFF;

--disable_query_log
--eval SET @@global.wsrep_cluster_address = '$wsrep_cluster_address_saved'
--enable_query_log
--source include/wait_until_connected_again.inc

--connection node_1
SELECT * FROM t1;
# Cleanup
DROP TABLE t1;
drop user user1;
drop user user2;

# Restore original auto_increment_offset values.
--source include/auto_increment_offset_restore.inc

--source include/galera_end.inc
--echo # End of test