connect  con1, localhost, user1, , ;
begin;
insert into test.t1 values (1), (2), (3);
commit;
begin;
select * from test.t1 for update;
a
1
2
3
connect  con2, localhost, user2, , ;
alter table test.t1 add column (b int);
connection default;
call dump_one_thread('user1');
username	event_name	sql_text
user1	statement/sql/select	select * from test.t1 for update
username	event_name	nesting_event_type
username	event_name	nesting_event_type
user1	stage/sql/Sending data	STATEMENT
user1	stage/sql/End of update loop	STATEMENT
user1	stage/sql/Query end	STATEMENT
user1	stage/sql/Commit	STATEMENT
user1	stage/sql/Closing tables	STATEMENT
user1	stage/sql/Unlocking tables	STATEMENT
user1	stage/sql/Closing tables	STATEMENT
user1	stage/sql/Starting cleanup	STATEMENT
user1	stage/sql/Freeing items	STATEMENT
user1	stage/sql/Reset for next command	STATEMENT
call dump_one_thread('user2');
username	event_name	sql_text
user2	statement/sql/alter_table	alter table test.t1 add column (b int)
username	event_name	nesting_event_type
user2	stage/sql/Waiting for table metadata lock	STATEMENT
username	event_name	nesting_event_type
user2	stage/sql/Init	STATEMENT
user2	stage/sql/Checking permissions	STATEMENT
user2	stage/sql/Init for update	STATEMENT
user2	stage/sql/Opening tables	STATEMENT
user2	stage/sql/After opening tables	STATEMENT
user2	stage/sql/Setup	STATEMENT
user2	stage/sql/Creating table	STATEMENT
user2	stage/sql/After create	STATEMENT
connection con1;
commit;
disconnect con1;
connection con2;
disconnect con2;
connection default;