[jira] [Resolved] (LUCENE-4991) QueryParser doesnt handle synonyms correctly for chinese

["Robert Muir (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-4991?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Robert Muir resolved LUCENE-4991.
---------------------------------

       Resolution: Fixed
    Fix Version/s: 4.4
                   5.0
    
> QueryParser doesnt handle synonyms correctly for chinese
> --------------------------------------------------------
>
>                 Key: LUCENE-4991
>                 URL: https://issues.apache.org/jira/browse/LUCENE-4991
>             Project: Lucene - Core
>          Issue Type: Bug
>          Components: modules/queryparser
>            Reporter: Robert Muir
>             Fix For: 5.0, 4.4
>
>         Attachments: LUCENE-4991.patch
>
>
> As reported multiple times on the user list:
> http://find.searchhub.org/document/eaf0e88a6a0d4d1f
> http://find.searchhub.org/document/abf28043c52b6efc
> http://find.searchhub.org/document/1313794632c90826
> The logic here is not forming the right query structures and ignoring positionIncrementAttribute from the tokenStream.
> * when default operator is AND, you can see it more clearly, as synonyms are wrongly inserted as additional MUST terms:
>     expected:<+field:中 +(field:国 field:國)> 
>     but was:<+field:中 +field:国 +field:國>
> * even when default operator is OR, its still wrong, because we ignore posInc and this means coord computation is not correct (so scoring is wrong)
> This also screws up scoring and queries for decompounding too (because they go thru this exact situation if they add the original compound as a synonym).

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira

---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: dev-help@lucene.apache.org