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https://issues.apache.org/jira/browse/SOLR-139?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12512628
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Ryan McKinley commented on SOLR-139:
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>
> ... avoid touching the less-modified/bigger fields ...
>
aaah, perhaps a future updateHandler getDocument() function could take a list
of fields it should extract. Still problems with what to do when you add it..
maybe it checks if anything has changed in the less-modified index? I see your
point.
>> What are you thinking? Adding the processor as a parameter to
>> AddUpdateCommand?
>
> I didn't have a clear alternative... I was just pointing out the future
> pitfalls of assuming too much implementation knowledge.
>
I am fine either way -- in the UpdateHandler or the Processors.
Request plumbing-wise, it feels the most natural in a processor. But if we
rework the AddUpdateCommand it could fit there too. I don't know if it is an
advantage or disadvantage to have the 'modify' parameters tied to the command
or the parameters. either way has its +-, with no real winner (or loser) IMO
In the end, I want to make sure that I never need a custom UpdateHandler (80%
is greek to me), but can easily change the 'modify' logic.
> Support updateable/modifiable documents
> ---------------------------------------
>
> Key: SOLR-139
> URL: https://issues.apache.org/jira/browse/SOLR-139
> Project: Solr
> Issue Type: Improvement
> Components: update
> Reporter: Ryan McKinley
> Assignee: Ryan McKinley
> Attachments: 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-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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