Comment 2 for bug 511979

I do run into this bug with a new database w/o demo data. This was not a fix. You will trigger the error either if you first install sale_journal and then magentoerpconnect or try to update the magentoerpconnect module with sale_journal being installed.
Here's my error log:

Environment Information :
System : Windows-Vista-6.1.7600
OS Name : nt
Operating System Release : Vista
Operating System Version : 6.1.7600
Operating System Architecture : 32bit
Operating System Locale : de_DE.cp1252
Python Version : 2.5.2
OpenERP-Client Version : 5.0.12
Last revision No. & ID :Bazaar Package not Found !Traceback (most recent call last):
  File "/home/thomdrei/workspace/server/bin/netsvc.py", line 247, in dispatch
    result = LocalService(service_name)(method, *params)
  File "/home/thomdrei/workspace/server/bin/netsvc.py", line 76, in __call__
    return getattr(self, method)(*params)
  File "/home/thomdrei/workspace/server/bin/service/web_services.py", line 633, in execute
    return self._execute(db, uid, wiz_id, datas, action, context)
  File "/home/thomdrei/workspace/server/bin/service/web_services.py", line 613, in _execute
    return wiz.execute(db, uid, self.wiz_datas[wiz_id], action, context)
  File "/home/thomdrei/workspace/server/bin/wizard/__init__.py", line 178, in execute
    res = self.execute_cr(cr, uid, data, state, context)
  File "/home/thomdrei/workspace/server/bin/wizard/__init__.py", line 73, in execute_cr
    action_res = action(self, cr, uid, data, context)
  File "/home/thomdrei/workspace/server/bin/addons/base/module/wizard/wizard_module_upgrade.py", line 92, in _upgrade_module
    db, pool = pooler.restart_pool(cr.dbname, update_module=True)
  File "/home/thomdrei/workspace/server/bin/pooler.py", line 62, in restart_pool
    return get_db_and_pool(db_name, force_demo, status, update_module=update_module)
  File "/home/thomdrei/workspace/server/bin/pooler.py", line 40, in get_db_and_pool
    addons.load_modules(db, force_demo, status, update_module)
  File "/home/thomdrei/workspace/server/bin/addons/__init__.py", line 741, in load_modules
    r = load_module_graph(cr, graph, status, report=report)
  File "/home/thomdrei/workspace/server/bin/addons/__init__.py", line 584, in load_module_graph
    init_module_objects(cr, package.name, modules)
  File "/home/thomdrei/workspace/server/bin/addons/__init__.py", line 367, in init_module_objects
    result = obj._auto_init(cr, {'module': module_name})
  File "/home/thomdrei/workspace/addons/magentoerpconnect/sale.py", line 239, in _auto_init
    cr.execute("ALTER TABLE sale_order_line ALTER COLUMN discount TYPE numeric(16,6);")
  File "/home/thomdrei/workspace/server/bin/sql_db.py", line 77, in wrapper
    return f(self, *args, **kwargs)
  File "/home/thomdrei/workspace/server/bin/sql_db.py", line 122, in execute
    res = self._obj.execute(query, params)
NotSupportedError: FEHLER: Typ einer Spalte, die von einer Sicht oder Regel verwendet wird, kann nicht geändert werden
DETAIL: Regel _RETURN für Sicht sale_journal_picking_stats hängt von Spalte »discount« ab