[jira] [Assigned] (ARROW-12158) [Rust][DataFusion]: Implement support for the `now()` sql function

["Todd Farmer (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-12158?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Todd Farmer reassigned ARROW-12158:
-----------------------------------

    Assignee:     (was: Andrew Lamb)

This issue was last updated over 90 days ago, which may be an indication it is no longer being actively worked. To better reflect the current state, the issue is being unassigned. Please feel free to re-take assignment of the issue if it is being actively worked, or if you plan to start that work soon.

> [Rust][DataFusion]: Implement support for the `now()` sql function
> ------------------------------------------------------------------
>
>                 Key: ARROW-12158
>                 URL: https://issues.apache.org/jira/browse/ARROW-12158
>             Project: Apache Arrow
>          Issue Type: New Feature
>          Components: Rust, Rust - DataFusion
>            Reporter: Andrew Lamb
>            Priority: Major
>
> Usecase: selecting the last 5 minutes of data
> I would like to be able to run queries like this:
> ```
> select * from cpu where time > now() - interval '3' minute;
> ```
> Proposed implementation:
> follow postgres functions:  https://www.postgresql.org/docs/current/functions-datetime.html



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