message: Issue Remove DATETZ type
  Remove extra double quote.
diff: @@ -25,7 +25,7 @@ class TestAllTypes(object):
  'timestamp_ns': "'1990-01-01 00:00:00'::TIMESTAMP_NS",
  'timestamp_ms': "'1990-01-01 00:00:00'::TIMESTAMP_MS",
  'timestamp_tz': "'1990-01-01 00:00:00'::TIMESTAMPTZ",
  - 'date': "'1990-01-01'::DATE""}
  + 'date': "'1990-01-01'::DATE"}
  correct_answer_map = {'bool':[(False,), (True,), (None,)]
  , 'tinyint':[(-128,), (127,), (None,)], 'smallint': [(-32768,), (32767,), (None,)]
  