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From "Hoss Man (Created) (JIRA)" <>
Subject [jira] [Created] (LUCENE-3982) regex support in queryparser needs documented, and called out in CHANGES.txt
Date Sat, 14 Apr 2012 00:27:17 GMT
regex support in queryparser needs documented, and called out in CHANGES.txt

                 Key: LUCENE-3982
             Project: Lucene - Java
          Issue Type: Sub-task
            Reporter: Hoss Man
            Priority: Blocker
             Fix For: 4.0

Spun off of LUCENE-2604 where everyone agreed this needed done, but no one has done it yet,
and rmuir didn't want to leave the issue open...

some issues were pointed out in a recent mailing list thread that definitely seem like they
should be addressed before this is officially released...

* queryparsersyntax.xml doesn't mention this feature at all -- as major new syntax is should
really get it's own section with an example showing the syntax
* queryparsersyntax.xml's section on "Escaping Special Characters" needs to mention that '/'
is a special character

Also: Given that Yury encountered some real world situations in which the new syntax caused
problems with existing queries, it seems like we should definitely make a note about this
possibility more promonient ... i'm not sure if it makes sense in MIGRATE.txt but at a minimum
it seems like the existing CHANGES.txt entry should mention it, maybe something like...

* LUCENE-2604: Added RegexpQuery support to QueryParser. Regular expressions
  are now directly supported by the standard queryparser using the syntax... 
     fieldName:/expression/ OR /expression against default field/
  Users who wish to search for literal "/" characters are advised to 
  backslash-escape or quote those characters as needed. 
  (Simon Willnauer, Robert Muir)

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