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Posted to jira@arrow.apache.org by "Hongze Zhang (Jira)" <ji...@apache.org> on 2021/07/05 08:00:30 UTC

[jira] [Created] (ARROW-13257) [Java][Dataset] Allow passing empty columns for projection

Hongze Zhang created ARROW-13257:
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             Summary: [Java][Dataset] Allow passing empty columns for projection
                 Key: ARROW-13257
                 URL: https://issues.apache.org/jira/browse/ARROW-13257
             Project: Apache Arrow
          Issue Type: Improvement
          Components: Java
    Affects Versions: 4.0.1
            Reporter: Hongze Zhang
            Assignee: Hongze Zhang


Projecting on empty columns (functionally like a pure metadata query on source of data) was supported in C++ Dataset API in ARROW-11174. This is to align Java API's behavior within C++.



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