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Posted to issues@arrow.apache.org by "Antoine Pitrou (Jira)" <ji...@apache.org> on 2020/04/08 11:07:00 UTC
[jira] [Commented] (ARROW-8368) [Format] In C interface, clarify
resource management for consumers needing only a subset of child fields in
ArrowArray
[ https://issues.apache.org/jira/browse/ARROW-8368?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17078072#comment-17078072 ]
Antoine Pitrou commented on ARROW-8368:
---------------------------------------
> Should it be allowed to move multiple children, as long as they are moved at the same time, and the parent is released after?
We should experiment with that in the C++ implementation.
> In the event that children have disjoint internal resources, should there be a clarification around moved children having their resources released independently?
I don't think so. This is the producer's choice. It may for example use a single arena for all allocations in the array tree, and only release resources when all release callbacks have been called.
> [Format] In C interface, clarify resource management for consumers needing only a subset of child fields in ArrowArray
> ----------------------------------------------------------------------------------------------------------------------
>
> Key: ARROW-8368
> URL: https://issues.apache.org/jira/browse/ARROW-8368
> Project: Apache Arrow
> Issue Type: Improvement
> Components: Format
> Reporter: Wes McKinney
> Priority: Major
>
> The current implication of the C Interface is that only moving a single child out of an ArrowArray is allowed.
> Questions:
> * Should it be allowed to move multiple children, as long as they are moved at the same time, and the parent is released after?
> * In the event that children have disjoint internal resources, should there be a clarification around moved children having their resources released independently?
> See mailing list discussion https://lists.apache.org/thread.html/r92b77e0fa7bed384daa377e2178bc8e8ca46103928598050341e40b1%40%3Cdev.arrow.apache.org%3E
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