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From "David Smiley (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-12951) Should Child Doc Ids be unique?
Date Thu, 01 Nov 2018 13:54:00 GMT

    [ https://issues.apache.org/jira/browse/SOLR-12951?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16671638#comment-16671638
] 

David Smiley commented on SOLR-12951:
-------------------------------------

I guess we shouldn't make the ID pattern mandatory.  But _if_ the nested document ID conforms
to the aforementioned pattern (root ID, exclamation, nested ID), then I think we could at
least enforce uniqueness within the nested document structure.  I'm not sure if it's additionally
worth the expense in checking IDs globally (i.e. in the index).
Regardless, this ought to be documented, and ideally with a new documentation page dedicated
to nested documents. 

> Should Child Doc Ids be unique?
> -------------------------------
>
>                 Key: SOLR-12951
>                 URL: https://issues.apache.org/jira/browse/SOLR-12951
>             Project: Solr
>          Issue Type: Sub-task
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: mosh
>            Priority: Major
>
> Currently there is no constraint regarding child document ids, which can repeat themselves
in different documents.
> [~dsmiley] has previously brought the topic of child doc Ids
> {quote}make it mandatory that all child doc IDs start with a root doc ID then an exclamation
then whatever.{quote}
> This has made me think, should we enforce child document Ids to be unique?
> Perhaps chaining the root document id(which is unique) could aid?



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