There is no way to "update" a document in lucene, you always have to
remove the existing document and add the updated version with ALL its
fields. The updateDocument-method of IndexWriter exists only for
convenience (and to assure the operation is atomic), but internally it
does just that: remove the old document and add a new one.
In generally, this works best if you get all fields of the document from
your external datasource instead of the index, because depending on your
field configuration, there might be some information missing (especially
for fields that are not STORED or DocValues).
See also the Lucene FAQ:
https://wiki.apache.org/lucene-java/LuceneFAQ#How_do_I_update_a_document_or_a_set_of_documents_that_are_already_indexed.3F
Regards
Am 09.08.2016 um 20:51 schrieb lukes:
Thanks for the reply.
Is there a way to partially update the document ? I know there's a API
updateDocument on IndexWriter, but that seems to create a new document with
just a field i am specifying. What i want is delete some fields from
existing(indexed) document, and then add some new fields(could or not be
same). Alternatively i tried to search for the document, and then calling
removeFields and finally updateDocument, but now any search after the above
process is not able for find that document(I created the new IndexReader).
Am i missing anything ?
Regards.
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