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https://issues.apache.org/jira/browse/HIVE-21121?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16761836#comment-16761836
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paco87 edited comment on HIVE-21121 at 2/6/19 3:21 PM:
-------------------------------------------------------
It appears that this issue has something to do with timezones (maybe due to
summer/winter time) if UTC is 0 everything works fine.
I checked two timezones Europe/Warsaw and Europe/Kiev and issue appears on
diffrent dates.
Anyway when casting date to timestamp should show correct time "00:00:00"
Timezone Europe/Kiev example:
select cast(cast('1900-01-01' as date) as timestamp);
select cast(cast('1930-06-21' as date) as timestamp);
select cast(cast('1943-11-06' as date) as timestamp);
select cast(cast('1981-04-01' as date) as timestamp);
select cast(cast('1982-04-01' as date) as timestamp);
select cast(cast('1983-04-01' as date) as timestamp);
select cast(cast('1984-04-01' as date) as timestamp);
select cast(cast('1984-09-30' as date) as timestamp);
select cast(cast('1984-09-30' as date) as timestamp);
select cast(cast('1985-09-29' as date) as timestamp);
select cast(cast('1985-09-29' as date) as timestamp);
select cast(cast('1986-09-28' as date) as timestamp);
select cast(cast('1986-09-28' as date) as timestamp);
select cast(cast('1987-09-27' as date) as timestamp);
select cast(cast('1987-09-27' as date) as timestamp);
select cast(cast('1988-09-25' as date) as timestamp);
select cast(cast('1988-09-25' as date) as timestamp);
select cast(cast('1989-09-24' as date) as timestamp);
select cast(cast('1989-09-24' as date) as timestamp);
select cast(cast('1990-07-01' as date) as timestamp);
select cast(cast('1991-09-29' as date) as timestamp);
select cast(cast('1991-09-29' as date) as timestamp);
was (Author: paco87):
It appears that this issue has something to do with timezones is set (maybe due
to summer/winter time) if UTC is 0 everything works fine.
I checked two timezones Europe/Warsaw and Europe/Kiove and diffrent dates have
this problem.
Anyway when casting date to timestamp should show correct time "00:00:00"
Timezone Europe/Kiev example:
select cast(cast('1900-01-01' as date) as timestamp);
select cast(cast('1930-06-21' as date) as timestamp);
select cast(cast('1943-11-06' as date) as timestamp);
select cast(cast('1981-04-01' as date) as timestamp);
select cast(cast('1982-04-01' as date) as timestamp);
select cast(cast('1983-04-01' as date) as timestamp);
select cast(cast('1984-04-01' as date) as timestamp);
select cast(cast('1984-09-30' as date) as timestamp);
select cast(cast('1984-09-30' as date) as timestamp);
select cast(cast('1985-09-29' as date) as timestamp);
select cast(cast('1985-09-29' as date) as timestamp);
select cast(cast('1986-09-28' as date) as timestamp);
select cast(cast('1986-09-28' as date) as timestamp);
select cast(cast('1987-09-27' as date) as timestamp);
select cast(cast('1987-09-27' as date) as timestamp);
select cast(cast('1988-09-25' as date) as timestamp);
select cast(cast('1988-09-25' as date) as timestamp);
select cast(cast('1989-09-24' as date) as timestamp);
select cast(cast('1989-09-24' as date) as timestamp);
select cast(cast('1990-07-01' as date) as timestamp);
select cast(cast('1991-09-29' as date) as timestamp);
select cast(cast('1991-09-29' as date) as timestamp);
> Cast date to timestamp incorrect interpretation
> -----------------------------------------------
>
> Key: HIVE-21121
> URL: https://issues.apache.org/jira/browse/HIVE-21121
> Project: Hive
> Issue Type: Bug
> Components: SQL
> Affects Versions: 1.2.1, 2.1.0, 3.0.0
> Reporter: paco87
> Priority: Major
> Attachments: jira_replicate_issue.txt
>
>
> Hive is returning timestamp with current time when casting date to timestamp,
> where it should be 00:00:00.0 .
> This issue is wired. It seems that this happens only on specific dates:
> '1900-01-01'.
> +----------------------------++
> |ab|
> +----------------------------++
> |1900-01-01 11:28:46.869|
> |1900-01-01 11:28:46.869|
> |1900-01-01 11:28:46.869|
> |1900-01-01 11:28:46.869|
> |1890-01-01 00:00:00.0|
> |1901-01-01 00:00:00.0|
> |1900-01-01 11:28:46.869|
> +---------------------------++
> -I didin't notice this on any other date.-
> This might be connected to old issue: HIVE-10488
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