1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
|
#
# MDEV-11675 Two phase ALTER binlogging
#
# Prove that FTWRL in the middle of START and "COMPLETE" parts of ALTER
# is safe.
--source include/have_debug.inc
--source include/have_innodb.inc
--source include/master-slave.inc
--connection slave
--let $slave_parallel_threads= `select @@slave_parallel_threads`
--let $slave_parallel_mode= `select @@slave_parallel_mode`
--let $debug = `SELECT @@global.debug_dbug`
--source include/stop_slave.inc
SET @@global.slave_parallel_threads=4;
SET @@global.slave_parallel_mode=optimistic;
CHANGE MASTER TO master_use_gtid=slave_pos;
SET @@global.debug_dbug="+d,at_write_start_alter";
--source include/start_slave.inc
--connection master
SET @@session.binlog_alter_two_phase=true;
CREATE TABLE t1 (a INT) ENGINE=innodb;
--source include/save_master_gtid.inc
# Make sure the table exists on slave now.
--connection slave
--source include/sync_with_master_gtid.inc
--connection master
SET @@session.gtid_domain_id=11;
ALTER TABLE t1 ADD COLUMN b int, algorithm=instant;
--echo # START Alter having exclusive lock is waiting for the signal
--connection slave
--let $wait_condition = SELECT COUNT(*) = 1 FROM INFORMATION_SCHEMA.PROCESSLIST WHERE STATE = 'debug sync point: now'
--source include/wait_condition.inc
--echo # FTWRL is sent first to wait for SA
--connection slave1
--send FLUSH TABLES WITH READ LOCK
--echo # SA completes
# First wait for the FTWRL arrival.
--connection slave
--let $wait_condition = SELECT COUNT(*) = 1 FROM INFORMATION_SCHEMA.PROCESSLIST WHERE INFO = 'FLUSH TABLES WITH READ LOCK' and STATE = 'Waiting for worker threads to pause for global read lock'
--source include/wait_condition.inc
set DEBUG_SYNC= "now signal alter_cont";
--connection slave1
--reap
# Commit ALTER is hanging now
--connection slave
--let $wait_condition = SELECT COUNT(*) = 1 FROM INFORMATION_SCHEMA.PROCESSLIST WHERE COMMAND = 'Slave_worker' AND STATE = 'Waiting for backup lock'
--source include/wait_condition.inc
--echo # Release CA
--connection slave1
UNLOCK TABLES;
--connection master
--sync_slave_with_master
SHOW CREATE TABLE t1;
--source include/show_binlog_events.inc
--connection master
DROP TABLE t1;
--sync_slave_with_master
--echo # cleanup
--connection slave
set DEBUG_SYNC = RESET;
--source include/stop_slave.inc
--eval set global slave_parallel_threads = $slave_parallel_threads
--eval set global slave_parallel_mode = $slave_parallel_mode
--eval set @@global.debug_dbug = "$debug"
--source include/start_slave.inc
--source include/rpl_end.inc
|
