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https://issues.apache.org/jira/browse/SOLR-5193?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13751862#comment-13751862
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Hoss Man edited comment on SOLR-5193 at 8/27/13 11:12 PM:
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HeXin: the basic cncept you are request already exists by using the optimistic
concurrency features.
instead of a "check" operator that could only be used on the uniqueKey field,
the same type of assertion can be made by sending a {{\_version\_}} of "1"
which requires that the document exist (but doesn't care what it's current
version is).
This isn't really documented in a straightforward manner anywhere so i've
re-purposed your feature request into a documentation request...
http://yonik.com/solr/optimistic-concurrency/
was (Author: hossman):
HeXin: the basic cncept you are request already exists by using the
optimistic concurrency features.
instead of a "check" operator that could only be used on the uniqueKey field,
the same type of assertion can be made by sending a {{_version_}} of "1" which
requires that the document exist (but doesn't care what it's current version
is).
This isn't really documented in a straightforward manner anywhere so i've
re-purposed your feature request into a documentation request...
http://yonik.com/solr/optimistic-concurrency/
> Need better docs about Atomic Updates + Optimistic Concurrency
> --------------------------------------------------------------
>
> Key: SOLR-5193
> URL: https://issues.apache.org/jira/browse/SOLR-5193
> Project: Solr
> Issue Type: Improvement
> Components: documentation
> Reporter: HeXin
> Priority: Minor
>
> Atomic Update features are mentioned in passing in the Ref Guide, but not
> explained as well as on the wiki (and doesn't refer to it as "atomic updates"
> so it's hard to find)
> https://cwiki.apache.org/confluence/display/solr/Uploading+Data+with+Index+Handlers#UploadingDatawithIndexHandlers-UpdatingOnlyPartofaDocument
> https://wiki.apache.org/solr/Atomic_Updates
> In particula, The Optimistic Concurrency options on atomic updatesare not
> really documented at all.
> ---
> (Initial issue description requested a "check" option that could be used on
> the uniqueKey field when doing atomic updates that would cause hte updated to
> fail if the uniqueKey specified did not exist -- but this type of feature is
> not needed since we already support the equivilent optimisitic concurrency
> garuntees )
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