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Posted to dev@lucene.apache.org by "ASF subversion and git services (JIRA)" <ji...@apache.org> on 2014/05/14 22:14:16 UTC
[jira] [Commented] (SOLR-5973) Pluggable Ranking Collectors and
Merge Strategies
[ https://issues.apache.org/jira/browse/SOLR-5973?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13997975#comment-13997975 ]
ASF subversion and git services commented on SOLR-5973:
-------------------------------------------------------
Commit 1594698 from [~joel.bernstein] in branch 'dev/trunk'
[ https://svn.apache.org/r1594698 ]
SOLR-5973: Pluggable Ranking Collectors and Merge Strategies
> Pluggable Ranking Collectors and Merge Strategies
> -------------------------------------------------
>
> Key: SOLR-5973
> URL: https://issues.apache.org/jira/browse/SOLR-5973
> Project: Solr
> Issue Type: New Feature
> Components: search
> Reporter: Joel Bernstein
> Assignee: Joel Bernstein
> Priority: Minor
> Fix For: 4.9
>
> Attachments: SOLR-5973.patch, SOLR-5973.patch, SOLR-5973.patch, SOLR-5973.patch, SOLR-5973.patch, SOLR-5973.patch, SOLR-5973.patch, SOLR-5973.patch, SOLR-5973.patch, SOLR-5973.patch, SOLR-5973.patch, SOLR-5973.patch, SOLR-5973.patch, SOLR-5973.patch, SOLR-5973.patch
>
>
> This ticket introduces a new RankQuery and MergeStrategy to Solr. By extending the RankQuery class, and implementing it's interface, you can specify a custom ranking collector (TopDocsCollector) and distributed merge strategy for a Solr query.
> Sample syntax:
> {code}
> q={!customRank subquery=*:* param1=a param2=b}&wt=json&indent=true
> {code}
> In the sample above the param: {code}q={!customRank subquery=*:* param1=a param2=b}{code} points to a QParserPlugin that returns a Query that extends RankQuery. The RankQuery defines the custom ranking and merge strategy for it's subquery.
> The RankQuery impl will have to do several things:
> 1) Implement the RankQuery interface.
> 2) Wrap the subquery and proxy all calls to the Query interface to the subquery. Using local params syntax the subquery can be any valid Solr query. The custom QParserPlugin is responsible for parsing the subquery.
> 3) Implement hashCode() and equals() so the queryResultCache works properly with subquery and custom ranking algorithm.
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