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https://issues.apache.org/jira/browse/SPARK-31790?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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philipse updated SPARK-31790:
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Description:
`CAST(n,TIMESTAMPTYPE)` If n is Byte/Short/Int/Long data type, Hive treat n as
milliseconds unit , while Spark SQL as seconds unit. so the cast result is
different,please be care when you use it.
For example:
{code:java}
In spark
spark-sql> select cast(1586318188000 as timestamp);
52238-06-04 13:06:400.0
spark-sql> select cast(1586318188 as timestamp);
2020-04-08 11:56:28
In Hive
hive> select cast(1586318188000 as timestamp);
2020-04-08 11:56:28
hive> select cast(1586318188 as timestamp);
1970-01-19 16:38:38.188{code}
was:`CAST(n,TIMESTAMPTYPE)` If n is Byte/Short/Int/Long data type, Hive treat
n as milliseconds unit , while Spark SQL as seconds unit. so the cast result is
different,please be care when you use it
> cast scenarios may generate different results between Hive and Spark
> ---------------------------------------------------------------------
>
> Key: SPARK-31790
> URL: https://issues.apache.org/jira/browse/SPARK-31790
> Project: Spark
> Issue Type: Documentation
> Components: Documentation
> Affects Versions: 2.4.5
> Reporter: philipse
> Priority: Minor
>
> `CAST(n,TIMESTAMPTYPE)` If n is Byte/Short/Int/Long data type, Hive treat n
> as milliseconds unit , while Spark SQL as seconds unit. so the cast result is
> different,please be care when you use it.
> For example:
> {code:java}
> In spark
> spark-sql> select cast(1586318188000 as timestamp);
> 52238-06-04 13:06:400.0
> spark-sql> select cast(1586318188 as timestamp);
> 2020-04-08 11:56:28
> In Hive
> hive> select cast(1586318188000 as timestamp);
> 2020-04-08 11:56:28
> hive> select cast(1586318188 as timestamp);
> 1970-01-19 16:38:38.188{code}
>
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