def __init__(self, constant_value):
j_type = constant_value[0]
serializer = PickleSerializer()
pickled_data = serializer.loads(constant_value[1:])
# the type set contains
# TINYINT,SMALLINT,INTEGER,BIGINT,FLOAT,DOUBLE,DECIMAL,CHAR,VARCHAR,NULL,BOOLEAN
# the pickled_data doesn't need to transfer to anther python object
if j_type == 0:
self._constant_value = pickled_data
# the type is DATE
elif j_type == 1:
self._constant_value = \
datetime.date(year=1970, month=1, day=1) + datetime.timedelta(days=pickled_data)
# the type is TIME
elif j_type == 2:
seconds, milliseconds = divmod(pickled_data, 1000)
minutes, seconds = divmod(seconds, 60)
hours, minutes = divmod(minutes, 60)
self._constant_value = datetime.time(hours, minutes, seconds,
milliseconds * 1000)
# the type is TIMESTAMP
elif j_type == 3:
self._constant_value = \
datetime.datetime(year=1970, month=1, day=1, hour=0, minute=0, second=0) \
+ datetime.timedelta(milliseconds=pickled_data)
else:
raise Exception("Unknown type %s, should never happen" %
str(j_type))
def _parse_constant_value(constant_value) -> Tuple[str, Any]:
j_type = constant_value[0]
serializer = PickleSerializer()
pickled_data = serializer.loads(constant_value[1:])
# the type set contains
# TINYINT,SMALLINT,INTEGER,BIGINT,FLOAT,DOUBLE,DECIMAL,CHAR,VARCHAR,NULL,BOOLEAN
# the pickled_data doesn't need to transfer to anther python object
if j_type == 0:
parsed_constant_value = pickled_data
# the type is DATE
elif j_type == 1:
parsed_constant_value = \
datetime.date(year=1970, month=1, day=1) + datetime.timedelta(days=pickled_data)
# the type is TIME
elif j_type == 2:
seconds, milliseconds = divmod(pickled_data, 1000)
minutes, seconds = divmod(seconds, 60)
hours, minutes = divmod(minutes, 60)
parsed_constant_value = datetime.time(hours, minutes, seconds,
milliseconds * 1000)
# the type is TIMESTAMP
elif j_type == 3:
parsed_constant_value = \
datetime.datetime(year=1970, month=1, day=1, hour=0, minute=0, second=0) \
+ datetime.timedelta(milliseconds=pickled_data)
else:
raise Exception("Unknown type %s, should never happen" % str(j_type))
def _next_constant_num():
global _constant_num
_constant_num = _constant_num + 1
return _constant_num
constant_value_name = 'c%s' % _next_constant_num()
return constant_value_name, parsed_constant_value
