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From "James Dyer (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-3823) Parentheses in a boost query cause errors
Date Wed, 12 Sep 2012 14:27:07 GMT

    [ https://issues.apache.org/jira/browse/SOLR-3823?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13454028#comment-13454028
] 

James Dyer commented on SOLR-3823:
----------------------------------

Hoss,

I appreciate you fixing this, but I would rather get a fix that preserves the negative boost
support (SOLR-3278).  I guess I don't understand the bug this issue was addressing.  Is it
simply that "bq" would fail if extra whitespace was in the query?  Could we write a failing
testcase for that?  Do you see a reason why it would be difficult to fix this and retain the
negative boosts?

The discussion of LUCENE-4378 is pertinent:  we have products in our index that we either
do not sell or we know most of our customer do not want.  Yet they often score very high.
 The only way I can reliably prevent these from becoming top hits is to use a negative boost.
 I would imagine this is a frequent requirement.

I'm more than willing to contribute for this, but I couldn't tell that this issue was an actual
problem or a case of users putting whitespace where it doesn't belong and prior versions being
more forgiving.
                
> Parentheses in a boost query cause errors
> -----------------------------------------
>
>                 Key: SOLR-3823
>                 URL: https://issues.apache.org/jira/browse/SOLR-3823
>             Project: Solr
>          Issue Type: Bug
>          Components: query parsers
>    Affects Versions: 4.0-BETA
>         Environment: Mac, jdk 1.6, Chrome
>            Reporter: Mathos Marcer
>            Assignee: Hoss Man
>             Fix For: 4.0, 5.0
>
>
> When using a boost query (bq) that contains a parentheses (like this example from the
Relevancy Cookbook section of the wiki):
> {noformat}
>  ? defType = dismax 
>     & q = foo bar 
>     & bq = (*:* -xxx)^999 
> {noformat}
> You get the following error:
> org.apache.lucene.queryparser.classic.ParseException: Cannot parse '-xxx)': Encountered
" ")" ") "" at line 1, column 12. Was expecting one of: <EOF> <AND> ... <OR>
... <NOT> ... "+" ... "-" ... <BAREOPER> ... "(" ... "*" ... "^" ... <QUOTED>
... <TERM> ... <FUZZY_SLOP> ... <PREFIXTERM> ... <WILDTERM> ... <REGEXPTERM>
... "[" ... "{" ... <NUMBER> ...

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