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

["Ryan Harris (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-3822?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13544642#comment-13544642 ] 

Ryan Harris commented on HIVE-3822:
-----------------------------------

Shouldn't these tests have returned:
Wed, 19 Dec 2012 19:12:19
?


                
> 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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