On 9/18/2018 2:21 PM, Christopher Schultz wrote:
AIUI, Solr doesn't support updating a single field in a document. The document is replaced no matter how hard to try to be surgical about updating a single field.
Solr does have Atomic Update functionality. For this to work, the index must be appropriately configured. Many indexes do not qualify. Atomic Updates let the user send a request that is basically an update for individual fields rather than the full document. Solr will read the existing index data and translate that request internally to a full document update. The user thinks they are just updating a portion of the document, but Solr still indexes the whole thing.
There is also the In-Place Update feature, which is a lot closer to localized surgery, as it involves rewriting a portion of the docValues file for a segment, not indexing a new document. The field definition requirements for this are pretty extreme -- docValues ONLY. Depending on the size of the segment containing the document, this might be slower than simply indexing the full document again.
Thanks, Shawn
