[1.2.X] Fixed a case-sensitivity bug in Oracle introspection that was preventing inspectdb from identifying foreign keys.

Backport of r15785 from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@15786 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/db/backends/oracle/introspection.py

@@ -66,6 +66,7 @@ class DatabaseIntrospection(BaseDatabaseIntrospection):
         Returns a dictionary of {field_index: (field_index_other_table, other_table)}
         representing all relationships to the given table. Indexes are 0-based.
         """
+        table_name = table_name.upper()
         cursor.execute("""
     SELECT ta.column_id - 1, tb.table_name, tb.column_id - 1
     FROM   user_constraints, USER_CONS_COLUMNS ca, USER_CONS_COLUMNS cb,