Description of problem:
Spacewalk throws an error when you try and view a systems package profile
javax.servlet.ServletException: com.redhat.rhn.common.db.WrappedSQLException: ORA-00904: "SUBSTRING": invalid identifier. 


Version-Release number of selected component (if applicable):
2.5

How reproducible:
Always

Steps to Reproduce:
1. View a systems profile
System -> Software -> Packages -> Profile


Actual results:
ISE 

Expected results:
A list of installed packages

Additional info:
Running on CentOS 6 with Oracle 11g

Catalina logs show
2016-07-06 09:26:03,398 [TP-Processor12] ERROR com.redhat.rhn.common.db.datasource.CachedStatement - Error while processing cached statement sql: SELECT S.id, S.name
  FROM rhnServer S,
       rhnServer SBase
 WHERE S.org_id = SBase.org_id
   AND SBase.id = ?
   AND EXISTS (SELECT 1 FROM rhnUserServerPerms WHERE user_id = ? AND server_id = S.id)
   AND S.server_arch_id = SBase.server_arch_id
   AND SUBSTRING(S.release, '^[0-9]+') = SUBSTRING(SBase.release, '^[0-9]+')
   AND S.id != ?
   AND EXISTS(SELECT 1 FROM rhnServerFeaturesView SFV WHERE SFV.server_id = S.id AND SFV.label = 'ftr_profile_compare')
ORDER BY UPPER(S.name)
com.redhat.rhn.common.db.WrappedSQLException: ORA-00904: "SUBSTRING": invalid identifier

Here is the commit that introduced this change
https://github.com/spacewalkproject/spacewalk/commit/0420e50fa4fcd819b8c99ca28682a1a0f1fae621