Unfortunately, atomic "add" is add to a "list" (append) rather than add to a
"set" (only unique values). But, you can use the unique fields update
processor (solr.UniqFieldsUpdateProcessorFactory) to de-dupe specified
multivalued fields.
See:
http://lucene.apache.org/solr/4_5_1/solr-core/org/apache/solr/update/processor/UniqFieldsUpdateProcessorFactory.html
My e-book has more examples as well.
-- Jack Krupansky
-----Original Message-----
From: Anupam Bhattacharya
Sent: Wednesday, October 30, 2013 6:05 AM
To: solr-user@lucene.apache.org
Subject: Atomic Updates in SOLR
I am working on a offline tagging capability to tag records with a
thesaurus dictionary of key concepts. I am able to use the update="add"
option using xml and json update calls for a field to update specific
document field information. Although if I run the same atomic update query
twice then the multivalued string fields start showing duplicate value in
the multivalued field.
e.g. for a field name as tag at the initial it was having copper, iron,
steel
After running the atomic update query with <field name="tag"
update="add">steel</field> I will get the tag field values as following:
copper, iron, steel, steel. (Thus steel get added twice).
I looked at RemoveDuplicatesTokenFilterFactory but it helps to remove token
duplicate not multivalued field duplicates. Is there any updateProcessor to
stop the incoming duplicate value from indexing ?
Thanks in advance for any help.
Regards
Anupam
