[jira] [Created] (ARROW-14105) [C++] Reconcile type promotion rules between if_else, case_when, coalesce, select

["David Li (Jira)" <ji...@apache.org>]

David Li created ARROW-14105:
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             Summary: [C++] Reconcile type promotion rules between if_else, case_when, coalesce, select
                 Key: ARROW-14105
                 URL: https://issues.apache.org/jira/browse/ARROW-14105
             Project: Apache Arrow
          Issue Type: Improvement
          Components: C++
            Reporter: David Li
            Assignee: David Li


These functions are all conceptually similar and need to promote argument types to a common type. Right now they all have different type promotion heuristics, and there are a few in-progress PRs to improve type support; once those land, we should also reconcile the type promotion logic they use - presumably, all of them should be able to use the exact same logic in the end.



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