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https://issues.apache.org/jira/browse/SOLR-139?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13506735#comment-13506735
 ] 

Hoss Man commented on SOLR-139:
-------------------------------

bq. I believe yonik chose to implement it by using updateLog features.

i think it has to be - the "real time get" support provided by the updateLog is 
the only way to garuntee that the document will be available to atomicly update 
it.

Lukas: if the atomic update code path isn't throwing a big fat error if you try 
to use it w/o updateLog configured then that sounds to me like a bug -- can you 
please file a Jira for that
                
> 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
>             Fix For: 4.0
>
>         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_createIfNotExist.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.patch, SOLR-139.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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