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Posted to jira@arrow.apache.org by "Evan Chan (Jira)" <ji...@apache.org> on 2021/04/14 20:51:00 UTC

[jira] [Created] (ARROW-12391) [Rust][DataFusion] Implement date_trunc() function

Evan Chan created ARROW-12391:
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             Summary: [Rust][DataFusion] Implement date_trunc() function
                 Key: ARROW-12391
                 URL: https://issues.apache.org/jira/browse/ARROW-12391
             Project: Apache Arrow
          Issue Type: New Feature
          Components: Rust - DataFusion
    Affects Versions: 3.0.0
            Reporter: Evan Chan
             Fix For: 4.0.0


Implement the date_trunc function, as described in this PostGres manual:

[https://www.postgresql.org/docs/current/functions-datetime.html#FUNCTIONS-DATETIME-TRUNC]

 

This would allow for the following use cases to be solved:
 * casting of timestamps to other resolutions, such as millis and micros
 * rounding dates/timestamps 

It also allows the user to explicitly allow the truncation of timestamp precision.



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