Strange behaviour for "query" about aerospike-client-python HOT 4 CLOSED

q = client.query('logs', 'demo1')
q.where(p.equals('uuid', '12b9996cbd45492091d0daf17da3b5b9'))
q.foreach(callback)

q = client.scan('logs', 'demo1')
q.select('uuid')

def callback(r):
    if r[2]['uuid'] == '12b9996cbd45492091d0daf17da3b5b9': print r

q.foreach(callback)

Prints: (('logs', 'demo1', None,
    bytearray(b'\xe4\x1c\xb5VNw\x1aO#+_\xd7\xf8\x84\x81\xbdCz|\xff')),
    {'gen': 1, 'ttl': 2591537},
    {'uuid': u'12b9996cbd45492091d0daf17da3b5b9'})

q.where(p.equals('uuid', u'12b9996cbd45492091d0daf17da3b5b9'))
(-2L, 'predicate is invalid.', 'src/main/query/where.c', 225)

In [47]: q = client.query('logs2', 'ORG-demo')

In [48]: 

In [48]: q.where(p.equals('owner', 'demo'))
Out[48]: <aerospike.Query at 0x7fc5345fa670>

In [49]: 

In [49]: q.foreach(callback)
---------------------------------------------------------------------------
Exception                                 Traceback (most recent call last)
<ipython-input-49-fdc57a57e0c2> in <module>()
----> 1 q.foreach(callback)

Exception: (204L, 'AEROSPIKE_ERR_INDEX', None, None)

In [50]: %paste
q = client.query('logs2', 'ORG-demo')
q.where(p.equals('owner', 'demo'))
q.foreach(callback)
## -- End pasted text --
{'uuid': u'8928a8aed6d949489e30d9d529afbcb6', 'owner': u'demo'}
{'uuid': u'76d51d830925402a88a9ccfeabb7efa1', 'owner': u'demo'}