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From Apache Wiki <>
Subject [Solr Wiki] Update of "Atomic_Updates" by TadhgMulkern
Date Sat, 03 Nov 2012 18:50:33 GMT
Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Solr Wiki" for change notification.

The "Atomic_Updates" page has been changed by TadhgMulkern:

New page:
<!> [[Solr4.0]]

= Atomic Updates =
== Introduction ==

Atomic Updates is a new feature in Solr 4.0 that allows you to update on a field level rather
than on a document level (In previous versions). This means that you can update individual
fields without having to send the document to Solr with the update fields values. Internally
Solr re-adds the document to the index with the updated fields.

== Available Modifiers ==

 * {{{set}}} – sets or replaces a particular value, or remove the value if {{{null}}} is
specified as the new value. <!> Note: In the case of multi-valued fields if {{{null}}}
is specified on {{{set}}} all the values in the field are removed. See [[|SOLR-3862]]
 * {{{add}}} – adds an additional value to a multi-valued field 
 * {{{inc}}} – increments a numeric value by a specific amount

[[ | Update JSON Example]] <<BR>>
[[ | Update
XML Example]]

= References = <<BR>>

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