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https://issues.apache.org/jira/browse/SPARK-30793?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Maxim Gekk updated SPARK-30793:
-------------------------------
    Affects Version/s: 2.4.5

> Wrong truncations of timestamps before the epoch to minutes and seconds
> -----------------------------------------------------------------------
>
>                 Key: SPARK-30793
>                 URL: https://issues.apache.org/jira/browse/SPARK-30793
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.4.5, 3.0.0
>            Reporter: Maxim Gekk
>            Assignee: Maxim Gekk
>            Priority: Major
>             Fix For: 3.0.0
>
>
> Truncations to seconds and minutes of timestamps after the epoch are correct:
> {code:sql}
> spark-sql> select date_trunc('SECOND', '2020-02-11 00:01:02.123'), 
> date_trunc('SECOND', '2020-02-11 00:01:02.789');
> 2020-02-11 00:01:02   2020-02-11 00:01:02
> {code}
> but truncations of timestamps before the epoch are incorrect:
> {code:sql}
> spark-sql> select date_trunc('SECOND', '1960-02-11 00:01:02.123'), 
> date_trunc('SECOND', '1960-02-11 00:01:02.789');
> 1960-02-11 00:01:03   1960-02-11 00:01:03
> {code}
> The result must be *1960-02-11 00:01:02       1960-02-11 00:01:02*
> The same for the MINUTE level:
> {code:sql}
> spark-sql> select date_trunc('MINUTE', '1960-02-11 00:01:01'), 
> date_trunc('MINUTE', '1960-02-11 00:01:50');
> 1960-02-11 00:02:00   1960-02-11 00:02:00
> {code}
> The result must be 1960-02-11 00:01:00        1960-02-11 00:01:00



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