[jira] [Created] (LUCENE-9718) REGEX Pattern Search, character classes with quantifiers do not work

["Brian Feldman (Jira)" <ji...@apache.org>]

Brian Feldman created LUCENE-9718:
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             Summary: REGEX Pattern Search, character classes with quantifiers do not work
                 Key: LUCENE-9718
                 URL: https://issues.apache.org/jira/browse/LUCENE-9718
             Project: Lucene - Core
          Issue Type: Bug
          Components: core/search
    Affects Versions: 8.6.3, 7.7.3
            Reporter: Brian Feldman


Character classes with a quantifier do not work, no error is given and no results are returned. For example \d\{2} or \d\{2,3} as is commonly written in most languages supporting regular expressions, simply and quietly does not work.  A user work around is to write them fully out such as \d\d or [0-9][0-9] or as [0-9]\{2,3} .

 

This inconsistency or limitation is not documented, wasting the time of users as they have to figure this out themselves. I believe this inconsistency should be clearly documented and an effort to fixing the inconsistency would improve pattern searching.



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