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Posted to dev@lucene.apache.org by "yuejianjun (JIRA)" <ji...@apache.org> on 2016/02/24 07:29:18 UTC
[jira] [Commented] (LUCENE-6227) Add BooleanClause.Occur.FILTER
[ https://issues.apache.org/jira/browse/LUCENE-6227?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15160252#comment-15160252 ]
yuejianjun commented on LUCENE-6227:
------------------------------------
[~jpountz]
Declarationorg.apache.lucene.search.QueryWrapperFilter
@Deprecated
Deprecated. You can use Query objects directly for filtering by using BooleanClause.Occur.FILTER clauses in a BooleanQuery.
BooleanClause.Occur.FILTER is a BooleanClause.Occur.MUST of no score
QueryWrapperFilter is a OR query
BooleanClause.Occur.FILTER is a AND query
why QueryWrapperFilter is replaced with the BooleanClause.Occur.FILTER ?
> Add BooleanClause.Occur.FILTER
> ------------------------------
>
> Key: LUCENE-6227
> URL: https://issues.apache.org/jira/browse/LUCENE-6227
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Adrien Grand
> Assignee: Adrien Grand
> Priority: Minor
> Fix For: 5.1, master
>
> Attachments: LUCENE-6227.patch, LUCENE-6227.patch, LUCENE-6227.patch, LUCENE-6227.patch, LUCENE-6227.patch
>
>
> Now that we have weight-level control of whether scoring is needed or not, we could add a new clause type to BooleanQuery. It would behave like MUST exept that it would not participate in scoring.
> Why do we need it given that we already have FilteredQuery? The idea is that by having a single query that performs conjunctions, we could potentially take better decisions. It's not ready to replace FilteredQuery yet as FilteredQuery has handling of random-access filters that BooleanQuery doesn't, but it's a first step towards that direction and eventually FilteredQuery would just rewrite to a BooleanQuery.
> I've been calling this new clause type FILTER so far, but feel free to propose a better name.
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