[jira] [Commented] (ARROW-15067) [C++] Add OT spans for the scanner

["David Li (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ARROW-15067?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17457319#comment-17457319 ] 

David Li commented on ARROW-15067:
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Hmm, we could add a "parent span" or properly "parent span context" option to the scanner options. (That way you could link it up to a Flight span or something too.) You'd have to manually inject it to spans started in the scanner, though. (~2 lines of code or so for each span)

> [C++] Add OT spans for the scanner
> ----------------------------------
>
>                 Key: ARROW-15067
>                 URL: https://issues.apache.org/jira/browse/ARROW-15067
>             Project: Apache Arrow
>          Issue Type: Sub-task
>          Components: C++
>            Reporter: Weston Pace
>            Priority: Major
>
> There should be one span for each "read batch" and one scan for each "read file".  The batch spans should be children of the file span.
> If possible it would be nice if the "read file" spans were children of the exec plan when the scanner is being used as a source node.  I'm not sure if this is doable though since the scanner is often used outside the exec plan.



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