sunjincheng121 commented on a change in pull request #8420:
[FLINK-12408][python] Allow to define the data types in Python
URL: https://github.com/apache/flink/pull/8420#discussion_r286752931
##########
File path: flink-python/pyflink/table/types.py
##########
@@ -16,171 +16,1811 @@
# limitations under the License.
################################################################################
+import calendar
+import ctypes
+import datetime
+import decimal
import sys
+import time
+from array import array
+from copy import copy
+from functools import reduce
+from threading import RLock
-if sys.version > '3':
- xrange = range
+from pyflink.util.utils import to_jarray
+from pyflink.java_gateway import get_gateway
-__all__ = ['DataTypes']
+if sys.version >= '3':
+ long = int
+ basestring = unicode = str
+
+__all__ = ['DataTypes', 'UserDefinedType', 'Row']
class DataType(object):
"""
Base class for data types.
+
+ :param nullable: boolean, whether the type can be null (None) or not.
"""
- @classmethod
- def type_name(cls):
- return cls.__name__[:-4].lower()
+
+ def __init__(self, nullable=True):
+ self.nullable = nullable
+ self.conversion_cls = ''
+
+ def __repr__(self):
+ return '%s(%s)' % (self.__class__.__name__, str(self.nullable).lower())
Review comment:
Can we add ` def __str__(self, *args, **kwargs)` as well?
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