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https://issues.apache.org/jira/browse/SOLR-6003?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13981086#comment-13981086
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Jack Krupansky commented on SOLR-6003:
--------------------------------------

It sounds like a separate Jira should be filed for some of these broader 
discussions.

This specific Jira should focus on the specific issue of "increment" for a 
non-stored field, and "append" to a non-stored multivalued field. Clearly this 
case should produce an exception since it can't possibly do anything reasonable 
since it needs to access the previous value before applying the increment or 
append.


> JSON Update increment field with non-stored fields causes subtle problems
> -------------------------------------------------------------------------
>
>                 Key: SOLR-6003
>                 URL: https://issues.apache.org/jira/browse/SOLR-6003
>             Project: Solr
>          Issue Type: Bug
>          Components: update
>    Affects Versions: 4.7.1
>            Reporter: Kingston Duffie
>
> In our application we have large multi-field documents.  We occasionally need 
> to increment one of the numeric fields or add a value to a multi-value text 
> field.  This appears to work correctly using JSON update.  But later we 
> discovered that documents were disappearing from search results and 
> eventually found the documentation that indicates that to use field 
> modification you must store all fields of the document.
> Perhaps you will argue that you need to impose this restriction -- which I 
> would hope could be overcome because of the cost of us having to store all 
> fields.  But in any case, it would be better for others if you could return 
> an error if someone tries to update a field on documents with non-stored 
> fields.



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