[jira] [Updated] (ARROW-16158) [C++] rename ARROW_ENGINE to ARROW_SUBSTRAIT

["Jonathan Keane (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-16158?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jonathan Keane updated ARROW-16158:
-----------------------------------
    Priority: Blocker  (was: Major)

> [C++] rename ARROW_ENGINE to ARROW_SUBSTRAIT
> --------------------------------------------
>
>                 Key: ARROW-16158
>                 URL: https://issues.apache.org/jira/browse/ARROW-16158
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>            Reporter: Jonathan Keane
>            Priority: Blocker
>
> When we introduced substrait we reused the cmake + feature {{ARROW_ENGINE}} to mean compute+a few other things as well as the substrait consumer functionality. In general, right now, we don't yet need (or want) to build substrait in our packages (e.g. the R package) since many places don't yet take advantage of it. But the naming of the cmake or feature is now confusing: it effectively is only substrait if you separately enable copmute, etc. but it makes it sound like the query engine we have been building since 6.0.0 is disabled.
> We should rename {{ARROW_ENGINE}} to {{ARROW_SUBSTRAIT}} now and then we can add an {{ARROW_ENGINE}} later if we need to encompass a larger set of engine functionality (e.g. compute+spillover+scheduler+memory limits) if that's needed.



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