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Posted to jira@arrow.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2020/09/13 05:00:09 UTC
[jira] [Updated] (ARROW-8494) [C++] Implement vectorized array
reassembly logic
[ https://issues.apache.org/jira/browse/ARROW-8494?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ASF GitHub Bot updated ARROW-8494:
----------------------------------
Labels: pull-request-available (was: )
> [C++] Implement vectorized array reassembly logic
> -------------------------------------------------
>
> Key: ARROW-8494
> URL: https://issues.apache.org/jira/browse/ARROW-8494
> Project: Apache Arrow
> Issue Type: Sub-task
> Components: C++
> Reporter: Micah Kornfield
> Assignee: Micah Kornfield
> Priority: Major
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> This logic would attempt to create the data necessary for each field by passing through the levels once for each field. it is expected that due to SIMD this will perform better for nested data with shallow nesting, but due to repetitive computation might perform worse for deep nested that include List-types.
>
> At a high level the logic would be structured as:
> {{for each field:}}
> {{ for each rep/def level entry:}}
> {{ update null bitmask and offsets.}}
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