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https://issues.apache.org/jira/browse/HIVE-10488?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14521089#comment-14521089
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Alexander Pivovarov commented on HIVE-10488:
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looks like Orc table contains int values instead of date values
e.g. 1996-01-01=1994
I got very similar results as in the description when I removed quotation marks
wrapping date values:
{code}
-- 1996-01-01=1994
hive> select cast(1996-01-01 as timestamp);
OK
1969-12-31 16:00:01.994
-- 2000-01-01=1998
hive> select cast(2000-01-01 as timestamp);
OK
1969-12-31 16:00:01.998
-- 2000-12-31=1957
hive> select cast(2000-12-31 as timestamp);
OK
1969-12-31 16:00:01.957
{code}
my TimeZone is US/Pacific - this is why time is -8hr from 1970 (1969 4pm)
The description shows 1969 7pm (-5 hours offset from 1970) - So, their timezone
is US/Eastern
> cast DATE as TIMESTAMP returns incorrect values
> -----------------------------------------------
>
> Key: HIVE-10488
> URL: https://issues.apache.org/jira/browse/HIVE-10488
> Project: Hive
> Issue Type: Bug
> Components: SQL
> Affects Versions: 0.13.1
> Reporter: N Campbell
> Assignee: Chaoyu Tang
>
> same data in textfile works
> same data loaded into an ORC table does not
> connection property of tez/mr makes no difference.
> select rnum, cdt, cast (cdt as timestamp) from tdt
> 0 <null> <null>
> 1 1996-01-01 1969-12-31 19:00:09.496
> 2 2000-01-01 1969-12-31 19:00:10.957
> 3 2000-12-31 1969-12-31 19:00:11.322
> vs
> 0 <null> <null>
> 1 1996-01-01 1996-01-01 00:00:00.0
> 2 2000-01-01 2000-01-01 00:00:00.0
> 3 2000-12-31 2000-12-31 00:00:00.0
> create table if not exists TDT ( RNUM int , CDT date )
> STORED AS orc ;
> insert overwrite table TDT select * from text.TDT;
> 0|\N
> 1|1996-01-01
> 2|2000-01-01
> 3|2000-12-31
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