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From "Uwe L. Korn (JIRA)" <>
Subject [jira] [Commented] (ARROW-33) C++: Implement zero-copy array slicing
Date Sat, 04 Feb 2017 08:16:51 GMT


Uwe L. Korn commented on ARROW-33:

We should not need to make {{null_count}} virtual as the handling of valid bitmaps is the
same for all arrays. Just checking in the main implementation if it is {{<0}} and then
recompute should be enough. Given that we use the {{null_count}} mostly for checking if the
number of nulls is 0, and if not we go into the more expensive code path, I think the solution
to compute on first {{null_count()}} is the most reasonable.

> C++: Implement zero-copy array slicing
> --------------------------------------
>                 Key: ARROW-33
>                 URL:
>             Project: Apache Arrow
>          Issue Type: New Feature
>          Components: C++
>            Reporter: Wes McKinney
>            Assignee: Wes McKinney
> Sliced array results will retain a reference to the parent's data buffer

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