jira at apache
Jun 20, 2007, 1:12 PM
Post #1 of 1
(170 views)
Permalink
|
|
[jira] Assigned: (LUCENE-933) QueryParser can produce empty sub BooleanQueries when Analyzer proudces no tokens for input
|
|
[ https://issues.apache.org/jira/browse/LUCENE-933?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Doron Cohen reassigned LUCENE-933:
----------------------------------
Assignee: Doron Cohen
> QueryParser can produce empty sub BooleanQueries when Analyzer proudces no tokens for input
> -------------------------------------------------------------------------------------------
>
> Key: LUCENE-933
> URL: https://issues.apache.org/jira/browse/LUCENE-933
> Project: Lucene - Java
> Issue Type: Bug
> Reporter: Hoss Man
> Assignee: Doron Cohen
>
> as triggered by SOLR-261, if you have a query like this...
> +foo:BBB +(yak:AAA baz:CCC)
> ...where the analyzer produces no tokens for the "yak:AAA" or "baz:CCC" portions of the query (posisbly because they are stop words) the resulting query produced by the QueryParser will be...
> +foo:BBB +()
> ...that is a BooleanQuery with two required clauses, one of which is an empty BooleanQuery with no clauses.
> this does not appear to be "good" behavior.
> In general, QueryParser should be smarter about what it does when parsing encountering parens whose contents result in an empty BooleanQuery -- but what exactly it should do in the following situations...
> a) +foo:BBB +()
> b) +foo:BBB ()
> c) +foo:BBB -()
> ...is up for interpretation. I would think situation (b) clearly lends itself to dropping the sub-BooleanQuery completely. situation (c) may also lend itself to that solution, since semanticly it means "don't allow a match on any queries in the empty set of queries". .... I have no idea what the "right" thing to do for situation (a) is.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
---------------------------------------------------------------------
To unsubscribe, e-mail: java-dev-unsubscribe [at] lucene
For additional commands, e-mail: java-dev-help [at] lucene
|
