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Posted to issues@spark.apache.org by "Maxim Gekk (JIRA)" <ji...@apache.org> on 2019/08/11 18:39:00 UTC

[jira] [Updated] (SPARK-28420) Date/Time Functions: date_part for intervals

     [ https://issues.apache.org/jira/browse/SPARK-28420?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Maxim Gekk updated SPARK-28420:
-------------------------------
    Summary: Date/Time Functions: date_part for intervals  (was: Date/Time Functions: date_part)

> Date/Time Functions: date_part for intervals
> --------------------------------------------
>
>                 Key: SPARK-28420
>                 URL: https://issues.apache.org/jira/browse/SPARK-28420
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>    Affects Versions: 3.0.0
>            Reporter: Yuming Wang
>            Priority: Major
>
> ||Function||Return Type||Description||Example||Result||
> |{{date_part(}}{{text}}{{, }}{{timestamp}}{{)}}|{{double precision}}|Get subfield (equivalent to {{extract}}); see [Section 9.9.1|https://www.postgresql.org/docs/11/functions-datetime.html#FUNCTIONS-DATETIME-EXTRACT]|{{date_part('hour', timestamp '2001-02-16 20:38:40')}}|{{20}}|
> |{{date_part(}}{{text}}{{, }}{{interval}}{{)}}|{{double precision}}|Get subfield (equivalent to {{extract}}); see [Section 9.9.1|https://www.postgresql.org/docs/11/functions-datetime.html#FUNCTIONS-DATETIME-EXTRACT]|{{date_part('month', interval '2 years 3 months')}}|{{3}}|
> We can replace it with {{extract(field from timestamp)}}.
> https://www.postgresql.org/docs/11/functions-datetime.html



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