create table t1 (
a int not null,
b int not null,
unique key t1x1 (b) using hash,
primary key using hash (a)
) engine=ndb;
create table t2 (
a int not null,
b int not null,
key t2x1 (b),
primary key using hash (a),
constraint t2fk1 foreign key (b) references t1 (b)
) engine=ndb;

ndb_show_tables completed.....

select type,name from ndb_show_tables_results
where (type like '%Index%' or type like '%ForeignKey%')
and (name like '%t1%' or name like '%t2%')
order by name;
type	name
'ForeignKey'	'XX/XX/t2fk1'
'UniqueHashIndex'	't1x1$unique'
'OrderedIndex'	't2x1'
insert into t1 values (1,10),(2,20),(3,30),(4,40),(5,50);
insert into t2 values (1,10),(2,10),(3,30),(4,50),(5,50);
select * from t1 where b = 10 order by a;
a	b
1	10
select * from t2 where b = 10 order by a;
a	b
1	10
2	10
# run restart skip indexes

ndb_show_tables completed.....

select type,name from ndb_show_tables_results
where (type like '%Index%' or type like '%ForeignKey%')
and (name like '%t1%' or name like '%t2%')
order by name;
type	name
# run backup
# create empty schema
drop table t2, t1;
create table t1 (
a int not null,
b int not null,
unique key t1x1 (b) using hash,
primary key using hash (a)
) engine=ndb;
create table t2 (
a int not null,
b int not null,
key t2x1 (b),
primary key using hash (a),
constraint t2fk1 foreign key (b) references t1 (b)
) engine=ndb;

ndb_show_tables completed.....

select type,name from ndb_show_tables_results
where (type like '%Index%' or type like '%ForeignKey%')
and (name like '%t1%' or name like '%t2%')
order by name;
type	name
'ForeignKey'	'XX/XX/t2fk1'
'UniqueHashIndex'	't1x1$unique'
'OrderedIndex'	't2x1'
# run restore
select * from t1 where b = 10 order by a;
a	b
1	10
select * from t2 where b = 10 order by a;
a	b
1	10
2	10
drop table t2, t1;