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https://issues.apache.org/jira/browse/SOLR-9528?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15503230#comment-15503230
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Yonik Seeley commented on SOLR-9528:
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-1 to changing the name.
\_docid\_ has been around forever (at least since 2010), and there's a high bar
for breaking back compat. It's a major source of frustration for users.
Additionally, I've never actually seen anyone that has run into \_docid\_
confuse it with anything else. If people didn't read the docs carefully, they
would be just as likely to fall into a trap of considering "docnum" to be
persistent (why wouldn't it be? it's the document number)
new meme: "hypothetical confusion considered harmful" ;-)
> 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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