[TAJO-2110] Fix incorrect DateTime and remove hard coded tests

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 0.11.0, 0.12.0
• Fix Version/s: 0.12.0, 0.11.3
• Component/s: Data Type, Storage, Unit Test
• Assignee: Jinho Kim
• Reporter: Jinho Kim
• Created: 04/Apr/16 08:37
• Updated: 29/Apr/16 08:06
• Resolved: 27/Apr/16 08:32

Description

Currently, Most DateTime tests are not work correctly. because timezone is hardcode to the GMT for testing.
if you run CTAS, the result data will be incorrect. we should remove the hardcoded timezone in TajoTestingCluster

Here is some examples:

Example 1

if you run CTAS, the result data will be incorrect

default> create table test1 (col1 TIMESTAMP);
default> insert overwrite into test1 select '2016-04-04 00:00:00'::TIMESTAMP;
default> select * from test1;
col1
-------------------------------
2016-04-04 00:00:00
(1 rows, 0.057 sec, 0 B selected)
default> create table test2 as select * from test1;
[=========================================>] 100%  0.105 sec
(1 rows, 0.105 sec, 20 B inserted)
default> select * from test2;
col1
-------------------------------
2016-04-03 15:00:00

Example 2

default> select '2016-04-04 01:00:00'::TIMESTAMP - interval '1 hour';
?minus
-------------------------------
2016-04-04 09:00:00
(1 rows, 0.005 sec, 0 B selected)

Issue Links

• is broken by: TAJO-825 Datetime type refactoring.
• is related to: TAJO-2128 Add validator of Date/Time