>>> from pydal import DAL, Field
>>> db = DAL('sqlite://storage.db')
>>> db.define_table('thing',Field('name'))
<Table thing (id, name)>
>>> db.thing.insert(name='Chair')
1L
>>> query = db.thing.id > 0
>>> query.as_dict(flat=True)
{'second': 0, 'ignore_common_filters': False, 'optional_args': {}, 'first': {'fieldname': 'id', 'tablename': 'thing'}, 'op': 'gt'}
>>> db(query.as_dict(flat=True)).select(db.thing.ALL)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "pydal/base.py", line 691, in __call__
    return self.where(query, ignore_common_filters)
  File "pydal/base.py", line 702, in where
    return Set(self, query, ignore_common_filters=ignore_common_filters)
  File "pydal/objects.py", line 2096, in __init__
    query = self.parse(query)
  File "pydal/objects.py", line 2167, in parse
    return self.build(self.dquery)
  File "pydal/objects.py", line 2228, in build
    raise SyntaxError("Operator not supported: %s" % op)
SyntaxError: Operator not supported: gt