Description

A wildcard-Search for title or fulltext is not working with the MoinMoin Xapian Engine 1.0.4 (even with a trailing '*' wildcard).

Test

Doing a normal search like HelpOn

• TitleSearch - Result: 0

  • Xapian searches for complete indexed words. Because of that this search is a problem.

Doing a search with a trailing * like HelpOn*

• TitleSearch with a Star - Result: 0

  • because we don't support wildcard searches

But; if you doing some regex like regex:HelpOn*

• TitleSearch with REGEX - Result: 111 Results

  • because for regex: it falls back to non-xapian search (btw, that regex is not doing what you expect, correct would be HelpOn.*.

If you switch back to normal MoinMoin Search everything works as excepted.

Component selection

• MoinMoin Xapian Search

The Xapian::QueryParser should be able to do a Wildcard-Search, you mee need to set the FLAG_WILDCARD somewhere... (right?)

The QueryParser supports using a trailing '*' wildcard, which matches any number 
of trailing characters, so wildc* would match wildcard, wildcarded, wildcards, 
wildcat, wildcats, etc. This feature is disabled by default - 
pass Xapian::QueryParser::FLAG_WILDCARD in the flags argument of Xapian::QueryParser::parse_query(query_string, flags) 
to enable it, and tell the QueryParser which database to expand wildcards from 
using the QueryParser::set_database(database) method.

http://www.xapian.org/docs/queryparser.html

We don't use the xapian query parser, but a own queryparser (that is used for both slow non-indexed and xapian indexed search).

Details

... more details if needed here

Xapian Version

The Latest Xapian Search is 1.0.5 but I do not believe that this has something ToDo with the Version. Well I think you should use atleast the Version 1.0!

May check the Release Notes:

• http://wiki.xapian.org/ReleaseNotes_2f1_2e0_2e5

• http://svn.xapian.org/tags/1.0.5/xapian-core/NEWS?view=co

• http://svn.xapian.org/tags/1.0.5/xapian-bindings/NEWS?view=co

• http://svn.xapian.org/tags/1.0.5/xapian-applications/omega/NEWS?view=co

Workaround

You need to do some regex lilke regex:HelpOn*

http://rock.heavy.ch/?action=fullsearch&context=180&value=regex%3AHelpOn*&titlesearch=Titel

Or just not using Xapian Search

Discussion

confirmation

I confirm the problem on MoinMoin 1.6.2 with libxapian13 version 0.9.9-1 and python-xapian 0.9.9-1.1 on Debian Etch. -- EricVeirasGalisson 2008-04-04 12:37:19

Plan

• Priority:
• Assigned to:
• Status: this is not a bug (but you can see it as missing feature if you like)

CategoryMoinMoinNoBug