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From "Venkata Ramana G (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-3454) Problem with CAST(BIGINT as TIMESTAMP)
Date Tue, 30 Sep 2014 04:47:34 GMT

    [ https://issues.apache.org/jira/browse/HIVE-3454?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14152792#comment-14152792
] 

Venkata Ramana G commented on HIVE-3454:
----------------------------------------

I am using 0.12 release still this problems exists. Inconsistancy in casting.

select cast(cast(cast(1000 as INT) as TIMESTAMP) as INT) from src limit 1;               
       result:  1
select cast(cast(cast(1000 as BIGINT) as TIMESTAMP) as BIGINT) from src limit 1;         
 result:  1
select cast(cast(cast(1000.0 as DOUBLE) as TIMESTAMP) as DOUBLE) from src limit 1;   result:
 1000.0

converting int/bigint/tinyint to timestamp and back to int/bigint/tinyint changes the value.
 int/bigint/tinyint/boolean conversion to timestamp, should take input in seconds, just like
double.

Issue raised in sep/2012, still problem persists. This requires a fix.

> Problem with CAST(BIGINT as TIMESTAMP)
> --------------------------------------
>
>                 Key: HIVE-3454
>                 URL: https://issues.apache.org/jira/browse/HIVE-3454
>             Project: Hive
>          Issue Type: Bug
>          Components: Types, UDF
>    Affects Versions: 0.8.0, 0.8.1, 0.9.0, 0.10.0, 0.11.0, 0.12.0, 0.13.0, 0.13.1
>            Reporter: Ryan Harris
>              Labels: newbie, newdev, patch
>         Attachments: HIVE-3454.1.patch.txt, HIVE-3454.patch
>
>
> Ran into an issue while working with timestamp conversion.
> CAST(unix_timestamp() as TIMESTAMP) should create a timestamp for the current time from
the BIGINT returned by unix_timestamp()
> Instead, however, a 1970-01-16 timestamp is returned.



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