You'd use CloneField URP http://www.solr-start.com/javadoc/solr-lucene/org/apache/solr/update/processor/CloneFieldUpdateProcessorFactory.html
Then you do your custom algorithm. Or - as I just remembered - use one of the hash ones described in dedupe section: https://cwiki.apache.org/confluence/display/solr/De-Duplication (which don't see to require CloneField anyway). Regards, Alex. ---- http://www.solr-start.com/ - Resources for Solr users, new and experienced On 22 March 2017 at 14:55, Ronald Wood <rw...@smarsh.com> wrote: > I suppose it could be, but the flexibility of using copy directives is > appealing for handling multiple fields as defined in the schema. > > Since I have rarely looked at the UpdateRequestProcessor, I guess I don’t > know if it could take multiple fields to hash, and if so how that would be > expressed. > > -R > > On 3/22/17, 2:21 PM, "Alexandre Rafalovitch" <arafa...@gmail.com> wrote: > > Can this be done at the UpdateRequestProcessor stage? > > Regards, > Alex > > > On 22 Mar 2017 1:48 PM, "Ronald Wood" <rw...@smarsh.com> wrote: > > I have been mulling over the usefulness of a new Hash field type for being > able to validate data that is indexed but not stored. Basically, I’d use > copy directives to copy all fields to be hashed to the new hash field and > store a SHA-256 hash as a string. I’m still not sure how valuable it would > for us. Maybe someone has already done something similar? > > However, I was wondering in general about how one would go about > implementing and integrating a few FieldType. > > Looking at UUIDField<https://github.com/apache/lucene-solr/blob/ > master/solr/core/src/java/org/apache/solr/schema/UUIDField.java> as an > example, the work seems moderate. But then the question is, how would I > integrate it? Just drop in a new jar with the class or does it have to be > integrated into Solr as a proper commit? > > If it were valuable for others, I would love to contribute it, should we > go > ahead with it. But I already have had trouble getting our Legal Dept. to > give the go ahead to contribute the code that worked for re-indexing > docValues in place (SOLR-9437). ☹ > > -Ronald S. Wood > >
