Userstat does not count rows updated via FK cascade

--source include/have_innodb.inc

set @userstat.save= @@userstat;

set global userstat= 1;

create table t1 (a int key) engine=InnoDB;

insert into t1 values (1),(2);

create table t2 (b int, foreign key(b) references t1(a) on update cascade) engine=InnoDB;

insert into t2 values (1),(2);

select table_name, rows_changed from information_schema.table_statistics where table_name in ('t1','t2');

update t1 set a = 20 where a = 2;

select table_name, rows_changed from information_schema.table_statistics where table_name in ('t1','t2');

select * from t2;

# Cleanup

drop table t2, t1;

set global userstat= @userstat.save;

select table_name, rows_changed from information_schema.table_statistics where table_name in ('t1','t2');

table_name	rows_changed

t2	2

t1	2

update t1 set a = 20 where a = 2;

select table_name, rows_changed from information_schema.table_statistics where table_name in ('t1','t2');

table_name	rows_changed

t2	2

t1	3

select * from t2;

b

1

20