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Posted to jira@arrow.apache.org by "David Li (Jira)" <ji...@apache.org> on 2021/05/05 18:53:00 UTC
[jira] [Commented] (ARROW-12659) [C++][Compute] Support
SimplifyWithGuarantee(is_null(foo), is_valid(foo))
[ https://issues.apache.org/jira/browse/ARROW-12659?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17339844#comment-17339844 ]
David Li commented on ARROW-12659:
----------------------------------
Ah yes, you're right. I gave that a test too, but no dice (and I don't see any handling for is_valid in SimplifyWithGuarantee).
> [C++][Compute] Support SimplifyWithGuarantee(is_null(foo), is_valid(foo))
> -------------------------------------------------------------------------
>
> Key: ARROW-12659
> URL: https://issues.apache.org/jira/browse/ARROW-12659
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: David Li
> Priority: Major
> Labels: dataset, datasets, expression, expressions
>
> Simplifying a predicate using is_null with a guarantee using invert(is_null()) doesn't lead to any simplification.
> Once supported, tests should be added for Datasets to exercise row group filtering (and to generate the necessary clauses from statistics).
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