Thomas Scheffler created SOLR-6096:
--------------------------------------
Summary: Support Update and Delete on nested documents
Key: SOLR-6096
URL: https://issues.apache.org/jira/browse/SOLR-6096
Project: Solr
Issue Type: Improvement
Affects Versions: 4.7.2
Reporter: Thomas Scheffler
When using nested or child document. Update and delete operation on the root
document should also affect the nested documents, as no child can exist without
its parent :-)
Example
{code:xml|title=First Import}
<doc>
<field name="id">1</field>
<field name="title">Article with author</field>
<doc>
<field name="name">Smith, John</field>
<field name="role">author</field>
</doc>
</doc>
{code}
If I change my mind and the author was not named *John* but *_Jane_*:
{code:xml|title=Changed name of author of '1'}
<doc>
<field name="id">1</field>
<field name="title">Article with author</field>
<doc>
<field name="name">Smith, Jane</field>
<field name="role">author</field>
</doc>
</doc>
{code}
I would expect that John is not in the index anymore. Currently he is. There
might also be the case that any subdocument is removed by an update:
{code:xml|title=Remove author}
<doc>
<field name="id">1</field>
<field name="title">Article without author</field>
</doc>
{code}
This should affect a delete on all nested documents, too. The same way all
nested documents should be deleted if I delete the root document:
{code:xml|title=Deletion of '1'}
<delete>
<id>1</id>
<!-- implying also
<query>_root_:1</query>
-->
</delete>
{code}
This is currently possible to do all this stuff on client side by issuing
additional request to delete document before every update. It would be more
efficient if this could be handled on SOLR side. One would benefit on atomic
update. The biggest plus shows when using "delete-by-query".
{code:xml|title=Deletion of '1' by query}
<delete>
<query>title:*</query>
<!-- implying also
<query>_root_:1</query>
-->
</delete>
{code}
In that case one would not have to first query all documents and issue deletes
by those id and every document that are nested.
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