HHH-1904 and HHH-8217 still not fixed in 4.2.2

union-subclass mapping generates foreign key constraint name too long
org.hibernate.mapping.DenormalizedTable.createForeignKeys() concatenates FK name (generated with parent class table name) with hash of the current table name.
It results in a > 30 chars long FK name.
Running SchemaExport.execute(Target.EXPORT, Type.CREATE) with simple Animal/Cat/Person mapping joined :

[main] 2013-05-24 12:23:11,023 DEBUG :
create table CAT (
ID numeric(18,0) not null,
OWNER numeric(18,0) not null,
COLOR varchar(255),
primary key (ID)
)
.[main] 2013-05-24 12:23:11,064 DEBUG :
create table PERSON (
ID numeric(18,0) not null,
NAME varchar(255),
primary key (ID)
)
[main] 2013-05-24 12:23:11,114 DEBUG :
alter table CAT
add constraint FK_sikm6d1tc9th079dp3bgfuxk7103b6
foreign key (OWNER)
references PERSON
[main] 2013-05-24 12:23:11,134 ERROR : HHH000389: Unsuccessful: alter table CAT add constraint FK_sikm6d1tc9th079dp3bgfuxk7103b6 foreign key (OWNER) references PERSON
[main] 2013-05-24 12:23:11,134 ERROR : GDS Exception. 335544351. unsuccessful metadata update
Name longer than database column size