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Posted to jira@arrow.apache.org by "Jorge (Jira)" <ji...@apache.org> on 2020/08/23 21:40:00 UTC

[jira] [Commented] (ARROW-9837) [Rust] Add provider for variable

    [ https://issues.apache.org/jira/browse/ARROW-9837?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17182856#comment-17182856 ] 

Jorge commented on ARROW-9837:
------------------------------

Hi, and thank you for this proposal.

 

Could you help me understand where does these variables come from? Why can't you just inject them as literals to the SQL statement, e.g. {{SELECT c1 + 'test-...' FROM ...}}

Programatically, this can be achieved via the {{lit}} function, no?

> [Rust] Add provider for variable
> --------------------------------
>
>                 Key: ARROW-9837
>                 URL: https://issues.apache.org/jira/browse/ARROW-9837
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: Rust
>            Reporter: qingcheng wu
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> Select @@version;
> @@version is a variable, and if we want to get its value, we should get it from outside the system,



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