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Posted to issues@arrow.apache.org by "asfimport (via GitHub)" <gi...@apache.org> on 2024/11/26 19:23:53 UTC

[I] [Java] Support reading a subset of fields from an IPC file or stream [arrow-java]

asfimport opened a new issue, #242:
URL: https://github.com/apache/arrow-java/issues/242

   C++ supports `IpcReadOptions.included_fields` which lets you load a subset of (top-level) fields from an IPC file or stream, potentially saving on I/O costs. It would be useful to support this in Java as well. Some refactoring would be required since MessageSerializer currently reads record batch messages in as a whole, and it would be good to quantify how much of a benefit this provides in different scenarios.
   
   **Reporter**: [David Li](https://issues.apache.org/jira/browse/ARROW-17914) / @lidavidm
   
   <sub>**Note**: *This issue was originally created as [ARROW-17914](https://issues.apache.org/jira/browse/ARROW-17914). Please see the [migration documentation](https://github.com/apache/arrow/issues/14542) for further details.*</sub>


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