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https://issues.apache.org/jira/browse/ARROW-8235?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17067957#comment-17067957
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Neal Richardson edited comment on ARROW-8235 at 3/26/20, 7:04 PM:
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Base R "keeps" by default. Or maybe it is "emit null"?
was (Author: npr):
Base R "keeps" by default.
> [C++][Compute] Filter out nulls by default
> ------------------------------------------
>
> Key: ARROW-8235
> URL: https://issues.apache.org/jira/browse/ARROW-8235
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++ - Compute
> Affects Versions: 0.16.0
> Reporter: Ben Kietzman
> Assignee: Ben Kietzman
> Priority: Major
> Fix For: 0.17.0
>
>
> The filter kernel currently emits null when a slot in the selection mask is
> null. For compatibility with Kleene logic systems like SQL, this behavior
> should be configurable. Provide an option enumeration:
> {code}
> struct FilterOptions {
> enum NullSelectionBehavior {
> /// null slots in the selection mask will drop the filtered value
> DROP,
> /// null slots in the selection mask will keep the filtered value
> KEEP,
> /// null slots in the selection mask will replace the filtered value with
> null
> EMIT_NULL,
> } null_selection_behavior;
> };
> {code}
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