[ https://issues.apache.org/jira/browse/SOLR-6234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14057188#comment-14057188 ]
Mikhail Khludnev commented on SOLR-6234: ---------------------------------------- [~jacklo] I still think we need to *add* this QParse for Solr users, *rather than decommission the current Solr join*. I agree its' code is not easy to read, but I suppose it performs better in certain cases, and/or consume fewer memory than straightforward JoinUtil. re LUCENE-3759 : I don't believe that true distributed join performs well for practical usage (here I agree with Yonik's comment at SOLR-4905). As far as I understand, what you've done in SOLR-4905 allows to do _collocated join_ even with multiple shards ie. if we place _from_ and _to_ side documents at the same shard, it's able to join them. I think it's what we need. > Scoring modes for query time join > ---------------------------------- > > Key: SOLR-6234 > URL: https://issues.apache.org/jira/browse/SOLR-6234 > Project: Solr > Issue Type: New Feature > Components: query parsers > Affects Versions: 5.0, 4.10 > Reporter: Mikhail Khludnev > Attachments: lucene-join-solr-query-parser-0.0.2.zip > > > it adds {{scorejoin}} query parser which calls Lucene's JoinUtil underneath. > It supports: > - {{score=none|avg|max|total}} local param (passed as ScoreMode to JoinUtil), > also > - supports {{b=100}} param to pass {{Query.setBoost()}}. > So far > - it always passes {{multipleValuesPerDocument=true}} > - it doesn't cover cross core join case, I just can't find the multicore > testcase in Solr test, I appreciate if you point me on one. > - I attach standalone plugin project, let me know if somebody interested, I > convert it into the proper Solr codebase patch. Also please mention the > blockers! -- This message was sent by Atlassian JIRA (v6.2#6252) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org