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https://issues.apache.org/jira/browse/SOLR-139?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12470043
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Ryan McKinley commented on SOLR-139:
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I just attached a modified XmlUpdateRequestHandler that uses the new
IndexDocumentCommand . I left this out originally because I think the
discussion around syntax and functionality should be separated... BUT without
some example, it is tough to get a sense how this would work, so i added this
example.
Check the new file:
monitor-modifier.xml
It starts with:
<add mode="cat=DISTINCT,features=APPEND,price=INCREMENT,sku=REMOVE,OVERWRITE">
<doc>
<field name="id">3007WFP</field>
...
If you run ./post.sh monitor-modifier.xml multiple times and check:
http://localhost:8983/solr/select?q=id:3007WFP you should notice
1) the price increments by 5 each time
2) there is an additional 'feature' line each time
3) the categories are distinct even if the input is not
sku=REMOVE is required because sku is a stored field that is written to with
copyField.
Although I think this syntax is reasonable, this is just an example intended to
spark discussion. Other things to consider:
* rather then 'field=mode,' we could do 'field:mode,' this may look less like
HTTP request parameter syntax
* The update handler could skip any stored field that is the target of a
'copyField' automatically. This is the most normal case, so it may be the most
reasonable thing to do.
> 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
> Attachments: SOLR-139-IndexDocumentCommand.patch,
> SOLR-139-IndexDocumentCommand.patch, SOLR-139-XmlUpdater.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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