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https://issues.apache.org/jira/browse/SOLR-3076?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13660453#comment-13660453
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Vadim Kirilchuk edited comment on SOLR-3076 at 5/17/13 7:55 AM:
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Tom, you can take a look at AddBlockUpdateTest, it contains several examples.
Here SOLR-3076 and SOLR-3076-childDocs have a great difference:
here is SOLR-3076 style (Note: child documents inside fields):
{code:xml}
<add>
<doc>
<field name='id'>1</field>
<field name='type_s'>parent</field>
<field name='make_name_s'>Ford</field>
<field name="1th-subdocs">
<doc>
<field name='id'>2</field>
<field name='type_s'>child</field>
<field name='modelyear_name_s'>1992 Ford E150 Van 2WD</field>
</doc>
<doc>
<field name='id'>3</field>
<field name='type_s'>child</field>
<field name='modelyear_name_s'>1992 Ford E150 Van 2WD</field>
</doc>
</field>
<!--
This was done for case when you have more then 2 types in relation:for
example, Make->Model and Make->Factory
However, it is ok to just add all subdocs to 1th-subdocs fields.
-->
<field name="2th-subdocs">
<doc>
...
</doc>
</field>
</doc>
<doc>
...
</doc>
</add>
{code}
here is SOLR-3076-childDocs style (Note: child documents are another doc inside
doc):
{code:xml}
<add>
<doc>
<field name='id'>1</field>
<field name='type_s'>parent</field>
<field name='make_name_s'>Ford</field>
<doc>
<field name='id'>2</field>
<field name='type_s'>child</field>
<field name='modelyear_name_s'>1992 Ford E150 Van 2WD</field>
</doc>
<doc>
<field name='id'>3</field>
<field name='type_s'>child</field>
<field name='modelyear_name_s'>1992 Ford E150 Van 2WD</field>
</doc>
<!--
2th-subdocs from previous example can easily go here.
-->
<doc>
...
</doc>
</doc>
</add>
{code}
Also i suggest you to use SolrJ instead of plain xml, examples at
https://github.com/griddynamics/solr-fork/blob/trunk-patched/solr/core/src/test/org/apache/solr/update/AddBlockUpdateTest.java
look at testSolrJXML()
was (Author: vkirilchuk):
Tom, you can take a look at AddBlockUpdateTest, it contains several
examples.
Here SOLR-3076 and SOLR-3076-childDocs have a great difference:
here is SOLR-3076 style (Note: child documents inside fields):
{code:xml}
<add>
<doc>
<field name='id'>1</field>
<field name='type_s'>parent</field>
<field name='make_name_s'>Ford</field>
<field name="1th-subdocs">
<doc>
<field name='id'>2</field>
<field name='type_s'>child</field>
<field name='modelyear_name_s'>1992 Ford E150 Van 2WD</field>
</doc>
<doc>
<field name='id'>3</field>
<field name='type_s'>child</field>
<field name='modelyear_name_s'>1992 Ford E150 Van 2WD</field>
</doc>
</field>
<!--
This was done for case when you have more then 2 types in relation:for
example, Make->Model and Make->Factory
However, it is ok to just add all subdocs to 1th-subdocs fields.
-->
<field name="2th-subdocs">
<doc>
...
</doc>
</field>
</doc>
<doc>
...
</doc>
</add>
{code:xml}
here is SOLR-3076-childDocs style (Note: child documents are another doc inside
doc):
{code:xml}
<add>
<doc>
<field name='id'>1</field>
<field name='type_s'>parent</field>
<field name='make_name_s'>Ford</field>
<doc>
<field name='id'>2</field>
<field name='type_s'>child</field>
<field name='modelyear_name_s'>1992 Ford E150 Van 2WD</field>
</doc>
<doc>
<field name='id'>3</field>
<field name='type_s'>child</field>
<field name='modelyear_name_s'>1992 Ford E150 Van 2WD</field>
</doc>
<!--
2th-subdocs from previous example can easily go here.
-->
<doc>
...
</doc>
</doc>
</add>
{code}
Also i suggest you to use SolrJ instead of plain xml, examples at
https://github.com/griddynamics/solr-fork/blob/trunk-patched/solr/core/src/test/org/apache/solr/update/AddBlockUpdateTest.java
look at testSolrJXML()
> Solr 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
> 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,
> 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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