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Posted to jira@arrow.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2021/02/07 20:02:00 UTC

[jira] [Updated] (ARROW-11546) [Rust][Experiment][WIP] Experiment with a TypedArray trait

     [ https://issues.apache.org/jira/browse/ARROW-11546?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated ARROW-11546:
-----------------------------------
    Labels: pull-request-available  (was: )

> [Rust][Experiment][WIP] Experiment with a TypedArray trait
> ----------------------------------------------------------
>
>                 Key: ARROW-11546
>                 URL: https://issues.apache.org/jira/browse/ARROW-11546
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: Rust
>            Reporter: Tyrel Rink
>            Assignee: Tyrel Rink
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> A few of the arrow kernels rely on macros to iterate over values using a common ".value()" function, but:
> * this is unsafe on some array types (string, binary), but unsafe on other array types (primitive)
> * this forces iteration by index, which does not always optimize away bounds-checking (at least in the binary case)
> This PR is an experiment with a TypedArray trait, which provides access to array values (along with associated types describing those values).  This will NOT remove the need for downcasting, as the associated types aren't object-safe.  But it should be sufficient to allow simple processing of values from multiple array types using a generic function instead of a macro.



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