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Posted to jira@arrow.apache.org by "Joris Van den Bossche (Jira)" <ji...@apache.org> on 2021/05/11 08:53:00 UTC

[jira] [Commented] (ARROW-12715) [C++] SQL-style glob string match kernel

    [ https://issues.apache.org/jira/browse/ARROW-12715?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17342422#comment-17342422 ] 

Joris Van den Bossche commented on ARROW-12715:
-----------------------------------------------

This is kind of a "simpler" version compared to using an actual regex expression? 

I am wondering if we need to exactly implement this as a separate kernel with those specific features, or if this could be written in terms of the {{match_substring_regex}}. In principle an input string to match could be transformed into the equivalent regex pattern? And then we don't need to implement a light form of pattern matching ourselves. 

(of course, that would then require arrow to be compiled with a regex library for this function, and a specialized version might be faster?)

> [C++] SQL-style glob string match kernel
> ----------------------------------------
>
>                 Key: ARROW-12715
>                 URL: https://issues.apache.org/jira/browse/ARROW-12715
>             Project: Apache Arrow
>          Issue Type: New Feature
>          Components: C++
>            Reporter: Ian Cook
>            Priority: Major
>
> Similar to the SQL {{LIKE}} and {{ILIKE}} operators, with wildcard {{_}} matching a single character and wildcard {{%}} matching multiple characters, and an option controlling case sensitivity



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