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https://issues.apache.org/jira/browse/SOLR-139?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12616725#action_12616725
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Andrzej Bialecki commented on SOLR-139:
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It's possible to recover unstored fields, if the purpose of such recovery is to
make a copy of the document and update other fields. The process is
time-consuming, because you need to traverse all postings for all terms, so it
might be impractical for larger indexes. Furthermore, such recovered content
may be incomplete - tokens may have been changed or skipped/added by analyzers,
positionIncrement gaps may have been introduced, etc, etc.
Most of this functionality is implemented in Luke "Restore & Edit" function.
Perhaps it's possible to implement a new low-level Lucene API to do it more
efficiently.
> Support updateable/modifiable documents
> ---------------------------------------
>
> Key: SOLR-139
> URL: https://issues.apache.org/jira/browse/SOLR-139
> Project: Solr
> Issue Type: New Feature
> Components: update
> Reporter: Ryan McKinley
> Assignee: Ryan McKinley
> Attachments: Eriks-ModifiableDocument.patch,
> Eriks-ModifiableDocument.patch, Eriks-ModifiableDocument.patch,
> Eriks-ModifiableDocument.patch, Eriks-ModifiableDocument.patch,
> Eriks-ModifiableDocument.patch, getStoredFields.patch, getStoredFields.patch,
> getStoredFields.patch, getStoredFields.patch, getStoredFields.patch,
> SOLR-139-IndexDocumentCommand.patch, SOLR-139-IndexDocumentCommand.patch,
> SOLR-139-IndexDocumentCommand.patch, SOLR-139-IndexDocumentCommand.patch,
> SOLR-139-IndexDocumentCommand.patch, SOLR-139-IndexDocumentCommand.patch,
> SOLR-139-IndexDocumentCommand.patch, SOLR-139-IndexDocumentCommand.patch,
> SOLR-139-IndexDocumentCommand.patch, SOLR-139-IndexDocumentCommand.patch,
> SOLR-139-IndexDocumentCommand.patch, SOLR-139-ModifyInputDocuments.patch,
> SOLR-139-ModifyInputDocuments.patch, SOLR-139-ModifyInputDocuments.patch,
> SOLR-139-ModifyInputDocuments.patch, SOLR-139-XmlUpdater.patch,
> SOLR-269+139-ModifiableDocumentUpdateProcessor.patch
>
>
> It would be nice to be able to update some fields on a document without
> having to insert the entire document.
> Given the way lucene is structured, (for now) one can only modify stored
> fields.
> While we are at it, we can support incrementing an existing value - I think
> this only makes sense for numbers.
> for background, see:
> http://www.nabble.com/loading-many-documents-by-ID-tf3145666.html#a8722293
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