[jira] [Created] (HIVE-3822) Casting from double to timestamp type seems inconsistent

["Mark Grover (JIRA)" <ji...@apache.org>]

Mark Grover created HIVE-3822:
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             Summary: Casting from double to timestamp type seems inconsistent
                 Key: HIVE-3822
                 URL: https://issues.apache.org/jira/browse/HIVE-3822
             Project: Hive
          Issue Type: Bug
    Affects Versions: 0.9.0
            Reporter: Mark Grover
            Assignee: Mark Grover


{code}
select cast(1355944339 as timestamp) from decimal_3 limit 1;
1970-01-16 08:39:04.339

select cast(1355944339000 as timestamp) from decimal_3 limit 1;
2012-12-19 11:12:19

select cast(1355944339.123456789 as timestamp) from decimal_3 limit 1;
2012-12-19 11:12:19.1234567
{code}

If specifying the unixTimestamp without a decimal point, we need to specify the millisecond timestamp. If specifying with a decimal point, we need to specify only the second timestamp and the rest goes after decimal. Moreover, it seems like some precision is lost (notice '89' are lost in the last query.

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