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https://issues.apache.org/jira/browse/SOLR-9528?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15505254#comment-15505254
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Yonik Seeley commented on SOLR-9528:
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docid() as a value source is a good idea... as you say, makes it clearer that
it's a computed value.
That works for many contexts, except perhaps Alex's original usecase: fetch me
the document that corresponds to a specific \_docid\_ .
One could use something like frange(l=123456789,u=123456789)docid() but that's
pretty clunky
> 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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