set global binlog_alter_two_phase = ON;
set binlog_alter_two_phase = ON;
RESET MASTER;
create table myt (a int) engine=InnoDB;
alter table myt add column (b int);
FLUSH LOGS;
# Exec MYSQL_BINLOG --base64-output=decode-rows -v MYSQLD_DATADIR/BINLOG_FILENAME > MYSQLTEST_VARDIR/tmp/mysqlbinlog_verbose.sql
Verbose statements from : master-bin.000001
select replace(txt,'\r', '') as stmt from raw_binlog_rows where txt like '###%';
stmt
### alter table myt add column (b int)
### alter table myt add column (b int)
drop table raw_binlog_rows;
drop table myt;
set global binlog_alter_two_phase=0;