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https://issues.apache.org/jira/browse/LUCENE-9386?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17153677#comment-17153677
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ASF subversion and git services commented on LUCENE-9386:
---------------------------------------------------------
Commit 887fe4c83d4114c6238265ca7f05aa491525af9d in lucene-solr's branch
refs/heads/master from markharwood
[ https://gitbox.apache.org/repos/asf?p=lucene-solr.git;h=887fe4c ]
LUCENE-9386 add case insensitive RegExp matching option (#1541)
Added case insensitive search option (currently only works with ASCII
characters)
> RegExpQuery - add case insensitive matching option
> --------------------------------------------------
>
> Key: LUCENE-9386
> URL: https://issues.apache.org/jira/browse/LUCENE-9386
> Project: Lucene - Core
> Issue Type: Improvement
> Components: core/search
> Reporter: Mark Harwood
> Priority: Minor
>
> In searches sometimes case sensitivity is important and sometimes not.
> However, users don't want to have to index two versions of their data
> (lowercased and original) in order to service both case sensitive and case
> insensitive queries. To get around this users have been commonly seen to take
> a user query e.g. `powershell.exe` and search for it with the regex
> `[Pp][Oo][Ww][Ee][Rr][Ss][Hh][Ee][Ll][Ll]\.[Ee][Xx][Ee]`.
> The proposal is that we add an extra "case insensitive" option to the RegExp
> query flags to automatically do this sort of expansion when we create
> Automatons.
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