config root man

--source include/have_innodb.inc
--source include/have_debug.inc

create table t1 (
  rowid int,
  f1    int,
  f2    int,
  key i1 (f1, f2),
  key i2 (f2)) engine=innodb;

show create table t1;
insert into `t1` (rowid, f1, f2) values (1, 1, 10), (2, 1, NULL);

connect (a,localhost,root,,);
connect (b,localhost,root,,);

connection a;
start transaction with consistent snapshot;

connection b;
start transaction;
update t1 set f2 = 4  where f1 = 1 and f2 is null;

-- echo (b) Number of rows updated:
select row_count();

insert into t1 values (3, 1, null);

-- echo (b) After update and insert query.
select rowid, f1, f2 from t1;

commit;

connection a;

-- echo (a) Before the update statement is executed.
select rowid, f1, f2 from t1;

SET SESSION debug="+d,bug14007649";
update t1 set f2 = 6 where f1 = 1 and f2 is null;

-- echo (a) Number of rows updated:
select row_count();

-- echo (a) After the update statement is executed.
select rowid, f1, f2 from t1;

commit;

--echo "The trx with consistent snapshot ended."

select rowid, f1, f2 from t1;

connection default;
disconnect a;
disconnect b;

drop table t1;