path: root/mysql-test/suite/rpl/t/rpl_idempotency.test

# Testing various forms of idempotency for replication that should
# work the same way under statement based as under row based.

source include/master-slave.inc;
connection master;
source include/have_innodb.inc;
connection slave;
source include/have_innodb.inc;

connection master;
CREATE TABLE t1 (a INT PRIMARY KEY);
CREATE TABLE t2 (a INT);
INSERT INTO t1 VALUES (-1),(-2),(-3);
INSERT INTO t2 VALUES (-1),(-2),(-3);
sync_slave_with_master;

# A delete for a row that does not exist, the statement is
# deliberately written to be idempotent for statement-based
# replication as well. We test this towards both a table with a
# primary key and without a primary key.

connection slave;
DELETE FROM t1 WHERE a = -2;
DELETE FROM t2 WHERE a = -2;
connection master;
DELETE FROM t1 WHERE a = -2;
DELETE FROM t2 WHERE a = -2;
SELECT * FROM t1 ORDER BY a;
SELECT * FROM t2 ORDER BY a;
sync_slave_with_master;
SELECT * FROM t1 ORDER BY a;
SELECT * FROM t2 ORDER BY a;
let $last_error = query_get_value("SHOW SLAVE STATUS", Last_SQL_Errno, 1);
disable_query_log;
eval SELECT "$last_error" AS Last_SQL_Error;
enable_query_log;

# An insert of a row that already exists. Since we are replacing the
# row if it already exists, the most apropriate representation is
# INSERT IGNORE. We only test this towards a table with a primary key,
# since the other case does not make sense.

INSERT IGNORE INTO t1 VALUES (-2);
connection master;
INSERT IGNORE INTO t1 VALUES (-2);
SELECT * FROM t1 ORDER BY a;
sync_slave_with_master;
SELECT * FROM t1 ORDER BY a;
let $last_error = query_get_value("SHOW SLAVE STATUS", Last_SQL_Errno, 1);
disable_query_log;
eval SELECT "$last_error" AS Last_SQL_Error;
enable_query_log;

# BUG#19958: RBR idempotency issue for UPDATE and DELETE

# Statement-based and row-based replication have different behaviour
# when updating a row with an explicit WHERE-clause that matches
# exactly one row (or no row at all). For statement-based replication,
# the statement is idempotent since the first time it is executed, it
# will update exactly one row, and the second time it will not update
# any row at all.  This was not the case for row-based replication, so
# we test under both row-based and statement-based replication both
# for tables with and without primary keys.

connection slave;
UPDATE t1 SET a = 1 WHERE a = -1;
UPDATE t2 SET a = 1 WHERE a = -1;
connection master;
UPDATE t1 SET a = 1 WHERE a = -1;
UPDATE t2 SET a = 1 WHERE a = -1;
SELECT * FROM t1 ORDER BY a;
SELECT * FROM t2 ORDER BY a;
sync_slave_with_master;
SELECT * FROM t1 ORDER BY a;
SELECT * FROM t2 ORDER BY a;
let $last_error = query_get_value("SHOW SLAVE STATUS", Last_SQL_Errno, 1);
disable_query_log;
eval SELECT "$last_error" AS Last_SQL_Error;
enable_query_log;

connection master;
DROP TABLE t1, t2;
sync_slave_with_master;

# bug#31609 Not all RBR slave errors reported as errors
# bug#31552 Replication breaks when deleting rows from out-of-sync table
#           without PK

#
# Idempotent applying is not default any longer.
# The default for slave-exec-mode option and server
# variable slave_exec_mode  is 'STRICT'.
# When 'STRICT' mode is set, the slave SQL thread will stop whenever
# the row to change is not found. In 'IDEMPOTENT' mode, the SQL thread
# will continue running and apply the row - replace if it's Write_rows event -
# or skip to the next event.

# the previous part of the tests was with IDEMPOTENT slave's mode.


#
# Other than above idempotent errors dealing with foreign keys constraint
#

select @@global.slave_exec_mode /* must be IDEMPOTENT */;

connection master;

create table ti1 (b int primary key) engine = innodb;
create table ti2 (a int primary key, b int, foreign key (b) references ti1(b))
     engine = innodb;
set foreign_key_checks=1 /* ensure the check */;

insert into ti1 values (1),(2),(3);
insert into ti2 set a=2, b=2;

sync_slave_with_master;

#connection slave;
select * from ti1 order by b /* must be (1),(2),(3) */;
insert into ti2 set a=1, b=1;
select * from ti2 order by b /* must be (1,1) (2,2) */;

connection master;

# from now on checking rbr specific idempotent errors
set @save_binlog_format= @@session.binlog_format;
set @@session.binlog_format= row;
delete from ti1 where b=1;

select * from ti1 order by b /* must be (2),(3) */;

# slave must catch up (expect some warnings in error.log)
sync_slave_with_master;

#connection slave;
select * from ti1 order by b /* must stays as were on master (1),(2),(3) */;

delete from ti1 where b=3;

connection master;
insert into ti2 set a=3, b=3;

# slave must catch up (expect some warnings in error.log)
sync_slave_with_master;

#connection slave;
select * from ti2 order by b /* must be (1,1),(2,2) - not inserted */;


#
# Checking the new global sys variable
#

connection slave;

set global slave_exec_mode='IDEMPOTENT';
set global slave_exec_mode='STRICT';

# checking mutual exclusion for the options
--error ER_SLAVE_AMBIGOUS_EXEC_MODE
set global slave_exec_mode='IDEMPOTENT,STRICT';

select @@global.slave_exec_mode /* must be STRICT */;

#
# Checking stops.
# In the following sections strict slave sql thread is going to
# stop when faces an idempotent error. In order to proceed
# the mode is temporarily switched to indempotent.
#

#
--echo *** foreign keys errors as above now forces to stop
#

connection master;

set foreign_key_checks=0;
drop table ti2, ti1;

create table ti1 (b int primary key) engine = innodb;
create table ti2 (a int primary key, b int, foreign key (b) references ti1(b))
     engine = innodb;
set foreign_key_checks=1 /* ensure the check */;

insert into ti1 values (1),(2),(3);
insert into ti2 set a=2, b=2;

sync_slave_with_master;

#connection slave;
select * from ti1 order by b /* must be (1),(2),(3) */;
--echo *** conspire future problem
insert into ti2 set a=1, b=1;
select * from ti2 order by b /* must be (1,1) (2,2) */;

connection master;

delete from ti1 where b=1 /* offending delete event */;
select * from ti1 order by b /* must be (2),(3) */;

# foreign key: row is referenced

--echo *** slave must stop
source include/wait_for_slave_sql_to_stop.inc;

connection slave;

let $last_error = query_get_value("SHOW SLAVE STATUS", Last_SQL_Errno, 1);
disable_query_log;
eval SELECT "$last_error" AS Last_SQL_Error;
enable_query_log;

select * from ti1 order by b /* must be (1),(2),(3) - not deleted */;
set foreign_key_checks= 0;
delete from ti2 where b=1;
set foreign_key_checks= 1;
set global slave_exec_mode='IDEMPOTENT';
start slave sql_thread;
connection master;
sync_slave_with_master;
#connection slave;
set global slave_exec_mode='STRICT';

connection master;

sync_slave_with_master;

#connection slave;
--echo *** conspire the following insert failure
# foreign key: no referenced row

--echo *** conspire future problem
delete from ti1 where b=3;

connection master;
insert into ti2 set a=3, b=3 /* offending write event */;
--echo *** slave must stop

source include/wait_for_slave_sql_to_stop.inc;

connection slave;

let $last_error = query_get_value("SHOW SLAVE STATUS", Last_SQL_Errno, 1);
disable_query_log;
eval SELECT "$last_error" AS Last_SQL_Error;
enable_query_log;

select * from ti2 order by b /* must be (2,2) */;
set foreign_key_checks= 0;
insert into ti1 set b=3;
set foreign_key_checks= 1;
set global slave_exec_mode='IDEMPOTENT';
start slave sql_thread;
connection master;
sync_slave_with_master;
#connection slave;
set global slave_exec_mode='STRICT';

connection master;

sync_slave_with_master;

select * from ti2 order by b /* must be (2,2),(3,3) */;

# 
--echo *** other errors
# 

# dup key insert

#connection slave;
--echo *** conspiring query
insert into ti1 set b=1;

connection master;
insert into ti1 set b=1 /* offending write event */;

--echo *** slave must stop
source include/wait_for_slave_sql_to_stop.inc;

connection slave;

let $last_error = query_get_value("SHOW SLAVE STATUS", Last_SQL_Errno, 1);
disable_query_log;
eval SELECT "$last_error" AS Last_SQL_Error;
enable_query_log;

set foreign_key_checks= 0;
delete from ti1 where b=1;
set foreign_key_checks= 1;
set global slave_exec_mode='IDEMPOTENT';
start slave sql_thread;
connection master;
sync_slave_with_master;
#connection slave;
set global slave_exec_mode='STRICT';

# key not found

connection master;

CREATE TABLE t1 (a INT PRIMARY KEY);
CREATE TABLE t2 (a INT);
INSERT INTO t1 VALUES (-1),(-2),(-3);
INSERT INTO t2 VALUES (-1),(-2),(-3);
sync_slave_with_master;

#connection slave;
DELETE FROM t1 WHERE a = -2;
DELETE FROM t2 WHERE a = -2;
connection master;
DELETE FROM t1 WHERE a = -2;

--echo *** slave must stop
source include/wait_for_slave_sql_to_stop.inc;

connection slave;

let $last_error = query_get_value("SHOW SLAVE STATUS", Last_SQL_Errno, 1);
disable_query_log;
eval SELECT "$last_error" AS Last_SQL_Error;
enable_query_log;

set global slave_exec_mode='IDEMPOTENT';
start slave sql_thread;
connection master;
sync_slave_with_master;
#connection slave;
set global slave_exec_mode='STRICT';

connection master;
DELETE FROM t2 WHERE a = -2;
--echo *** slave must stop
source include/wait_for_slave_sql_to_stop.inc;

connection slave;

let $last_error = query_get_value("SHOW SLAVE STATUS", Last_SQL_Errno, 1);
disable_query_log;
eval SELECT "$last_error" AS Last_SQL_Error;
enable_query_log;

set global slave_exec_mode='IDEMPOTENT';
start slave sql_thread;
connection master;
sync_slave_with_master;
#connection slave;
set global slave_exec_mode='STRICT';

UPDATE t1 SET a = 1 WHERE a = -1;
UPDATE t2 SET a = 1 WHERE a = -1;

connection master;
UPDATE t1 SET a = 1 WHERE a = -1;

--echo *** slave must stop
source include/wait_for_slave_sql_to_stop.inc;

connection slave;

let $last_error = query_get_value("SHOW SLAVE STATUS", Last_SQL_Errno, 1);
disable_query_log;
eval SELECT "$last_error" AS Last_SQL_Error;
enable_query_log;

set global slave_exec_mode='IDEMPOTENT';
start slave sql_thread;
connection master;
sync_slave_with_master;
#connection slave;
set global slave_exec_mode='STRICT';


connection master;
UPDATE t2 SET a = 1 WHERE a = -1;

--echo *** slave must stop
source include/wait_for_slave_sql_to_stop.inc;

connection slave;

let $last_error = query_get_value("SHOW SLAVE STATUS", Last_SQL_Errno, 1);
disable_query_log;
eval SELECT "$last_error" AS Last_SQL_Error;
enable_query_log;

set global slave_exec_mode='IDEMPOTENT';
start slave sql_thread;
connection master;
sync_slave_with_master;
#connection slave;
set global slave_exec_mode='STRICT';


# cleanup for bug#31609 tests

connection master;
set @@session.binlog_format= @save_binlog_format;
drop table t1,t2,ti2,ti1;

sync_slave_with_master;


--echo *** end of tests