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From "Mikhail Khludnev (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-3076) Solr(Cloud) should support block joins
Date Tue, 09 Jul 2013 09:15:53 GMT

    [ https://issues.apache.org/jira/browse/SOLR-3076?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13703080#comment-13703080
] 

Mikhail Khludnev commented on SOLR-3076:
----------------------------------------

bq. 2. How would Solr block join compare with Elasticsearch "nested types"? ...

ElasticSearch also provides some sort of "nested facets". However, I found them useless for
real life eCommerce faceting. Though, internally ES has enough infrastructure to provide correct
item level faceting. I feel it can be delivered there easily. It's worth to clarify what I
mean in "real life eCommerce faceting", just check any site: if we have colored items which
are nested into top-level products, and when we count item level facets eg color, we need
to count number of *products* which has any items of the particular color and passed item
level filter eg size. 

also desired direction is relations schema, see discussion in the beginning, I'm not sure
how ElasticSearch address it.   

bq. 3. Can individual child documents be updated,...

you can only delete. I mean, you should be able to do so, but I don't remember whether it's
covered by test or not. Update,Replace,Append might be possible only after "stacked updates"
are there (frankly speaking, never).    
                
> Solr(Cloud) should support block joins
> --------------------------------------
>
>                 Key: SOLR-3076
>                 URL: https://issues.apache.org/jira/browse/SOLR-3076
>             Project: Solr
>          Issue Type: New Feature
>            Reporter: Grant Ingersoll
>            Assignee: Yonik Seeley
>             Fix For: 5.0, 4.4
>
>         Attachments: 27M-singlesegment-histogram.png, 27M-singlesegment.png, bjq-vs-filters-backward-disi.patch,
bjq-vs-filters-illegal-state.patch, child-bjqparser.patch, dih-3076.patch, dih-config.xml,
parent-bjq-qparser.patch, parent-bjq-qparser.patch, Screen Shot 2012-07-17 at 1.12.11 AM.png,
SOLR-3076-childDocs.patch, SOLR-3076.patch, SOLR-3076.patch, SOLR-3076.patch, SOLR-3076.patch,
SOLR-3076.patch, SOLR-3076.patch, SOLR-3076.patch, SOLR-3076.patch, SOLR-3076.patch, SOLR-3076.patch,
SOLR-7036-childDocs-solr-fork-trunk-patched, solrconf-bjq-erschema-snippet.xml, solrconfig.xml.patch,
tochild-bjq-filtered-search-fix.patch
>
>
> Lucene has the ability to do block joins, we should add it to Solr.

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