You are viewing a plain text version of this content. The canonical link for it is here.

Posted to jira@arrow.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2021/10/20 00:33:00 UTC

[jira] [Updated] (ARROW-14389) [C++][Gandiva] Fix performance bug with LIKE expressions with reserved characters

     [ https://issues.apache.org/jira/browse/ARROW-14389?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated ARROW-14389:
-----------------------------------
    Labels: pull-request-available  (was: )

> [C++][Gandiva] Fix performance bug with LIKE expressions with reserved characters
> ---------------------------------------------------------------------------------
>
>                 Key: ARROW-14389
>                 URL: https://issues.apache.org/jira/browse/ARROW-14389
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: C++ - Gandiva
>            Reporter: João Victor Huguenin
>            Assignee: João Victor Huguenin
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> Seeing dramatic differences in Gandiva processing time during filter operations for queries with a LIKE filter on a character field with a reserved character (-,/& etc). The version with a reserved character in the string is considerably slower than a similar filter without a reserved character. For patterns like %abc% and %ab-c%, the latter wasn't being optimized to become an is_substr expression because of the regex used to identify those cases.



--
This message was sent by Atlassian Jira
(v8.3.4#803005)