After i upgraded to 2.15.3 I got serious problems with Oracle. First of 
all: new lowercase tables were created. Then I read that this is due to the 
new "entity_quoting" option. Nevertheles I decided to degrade my project to 
basic auth tables (nothing more!).
I dropped everything on Oracle side via sqlplus. After first request I got 
this error. Migration is active to create tables, "app_auth_user" is 
created and then error. No *.table files in databases folder. Fighting 
several hours with this (so basic!) issue.
I am getting crazy because of that :(

Note: I changed oracle.py at line 70, because "all parameters were not 
converted" error

Can anyone help?

Environment: python 2.7.12, oracle 12.2, cx_Oracle 6.0.1, web2py 2.15.3, 
Ubuntu 16.04 LTS


Traceback (most recent call last):
  File "/home/zpomianowski/web2py/gluon/restricted.py", line 219, in restricted
    exec(ccode, environment)
  File "/home/zpomianowski/web2py/applications/eparagon/models/db.py" 
<http://127.0.0.1:8000/admin/default/edit/eparagon/models/db.py>, line 59, in 
<module>
    auth.define_tables(username=False, signature=False)
  File "/home/zpomianowski/web2py/gluon/tools.py", line 2216, in define_tables
    super(Auth, self).define_tables(username, signature, migrate, 
fake_migrate)._table_signature_list
  File "/home/zpomianowski/web2py/gluon/authapi.py", line 350, in define_tables
    format='%(first_name)s %(last_name)s (%(id)s)'))
  File "/home/zpomianowski/web2py/gluon/packages/dal/pydal/base.py", line 587, 
in define_table
    table = self.lazy_define_table(tablename, *fields, **args)
  File "/home/zpomianowski/web2py/gluon/packages/dal/pydal/base.py", line 621, 
in lazy_define_table
    polymodel=polymodel)
  File "/home/zpomianowski/web2py/gluon/packages/dal/pydal/adapters/base.py", 
line 797, in create_table
    return self.migrator.create_table(*args, **kwargs)
  File "/home/zpomianowski/web2py/gluon/packages/dal/pydal/migrator.py", line 
277, in create_table
    self.adapter.create_sequence_and_triggers(query, table)
  File "/home/zpomianowski/web2py/gluon/packages/dal/pydal/adapters/oracle.py", 
line 68, in create_sequence_and_triggers
    self.execute(query)
  File 
"/home/zpomianowski/web2py/gluon/packages/dal/pydal/adapters/__init__.py", line 
67, in wrap
    return f(*args, **kwargs)
  File "/home/zpomianowski/web2py/gluon/packages/dal/pydal/adapters/oracle.py", 
line 52, in execute
    rv = self.cursor.execute(command, *args[1:], **kwargs)
DatabaseError: ORA-00955: name is already used by an existing object


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