Arithmetic subtraction fails in 10g, works in 11g

Question

With this setup:
create table person (id number, version number, groupscount number);
create table groupfollower (followerid number, followingid number);
insert into person values (1,1,0);
insert into person values (2,1,0);
insert into groupfollower values (1,2);
UPDATE Person
SET version =version+1,
groupsCount=
*(SELECT COUNT(followingg1_.followerId)*
FROM GroupFollower followingg1_
WHERE Person.id=followingg1_.followerId
*)-1*
WHERE id IN
(SELECT groupfollo2_.followerId
FROM GroupFollower groupfollo2_
WHERE groupfollo2_.followingId=2
10g produces an error -- ora-00933: SQL command not properly ended 00933. 00000 - "SQL command not properly ended" Cause: Action: Error at Line:16 Column:4 Line 16 is the ")-1"
should this not be valid? The query actually works just fine you put the 1- in front, but these queries are being generated by hibernate, and I'm not sure how to override this behavior-

Answer 1

It is a known issue in 10g. Put constans an the beginning of subquery expression:
SQL> UPDATE Person
  2  SET version =version+1,
  3  groupsCount=
  4  (SELECT COUNT(followingg1_.followerId)
  5  FROM GroupFollower followingg1_
  6  WHERE Person.id=followingg1_.followerId
  7  )-1
  8  WHERE id IN
  9  (SELECT groupfollo2_.followerId
10  FROM GroupFollower groupfollo2_
11  WHERE groupfollo2_.followingId=2
12  )
13 
14 
15  /
)-1
ERROR at line 7:
ORA-00933: SQL command not properly ended
SQL> UPDATE Person
  2  SET version =version+1,
  3  groupsCount= -1 +
  4  (SELECT COUNT(followingg1_.followerId)
  5  FROM GroupFollower followingg1_
  6  WHERE Person.id=followingg1_.followerId)
  7  WHERE id IN
  8  (SELECT groupfollo2_.followerId
  9  FROM GroupFollower groupfollo2_
10  WHERE groupfollo2_.followingId=2
11  )
12  /
1 row updated.
SQL> SY.