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https://issues.apache.org/jira/browse/SOLR-9528?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15502960#comment-15502960
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Alexandre Rafalovitch commented on SOLR-9528:
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+1 on changing the names if that helps.

-1 on removing it from the message, unless something better is put there (like 
Solr document id....). 

> Make _docid_ (lucene id) a pseudo field
> ---------------------------------------
>
>                 Key: SOLR-9528
>                 URL: https://issues.apache.org/jira/browse/SOLR-9528
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public) 
>    Affects Versions: master (7.0)
>            Reporter: Alexandre Rafalovitch
>            Priority: Minor
>
> Lucene document id is a transitory id that cannot be relied on as it can 
> change on document updates, etc.
> However, there are circumstances where it could be useful to use it in a 
> search. The primarily use is a debugging where some error messages provide 
> only lucene document id as the reference. For example:
> {noformat}
> child query must only match non-parent docs, but parent docID=38200 matched 
> childScorer=class org.apache.lucene.search.DisjunctionSumScorer
> {noformat}
> We already expose the lucene id with \[docid] transformer with \_docid_ 
> sorting.
> On the email list, [~yo...@apache.org] proposed that _docid_ should be a 
> legitimate pseudo-field, which would make it returnable, usable in function 
> queries, etc.



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