Hi Devansh, Yes you'd need to reindex your data in order to use DocValues. It's highlighted here @ the official ref guide :
https://cwiki.apache.org/confluence/display/solr/DocValues On Fri, Nov 13, 2015 at 10:00 AM, Dhutia, Devansh <ddhu...@gannett.com> wrote: > We have an existing collection with a field called lastpublishdate of type > tdate. It already has a lot of data indexed, and we want to add docValues > to improve our sorting performance on the field. > > The old field definition was: > > <field name="lastpublishdate" type="tdate" indexed="true" stored=“true"/> > > We we recently changed it to > > <field name="lastpublishdate" type="tdate" indexed="true" stored="true" > docValues="true"/> > > Is that considered a breaking change? Upon deploying the schema & > reloading the collection, sorting on the field fails the following error: > > unexpected docvalues type NONE for field 'lastpublishdate' > (expected=NUMERIC). Use UninvertingReader or index with docvalues. > > Do we really need to wipe & rebuild the entire index to add docValues to > an existing dataset? > > Thanks > -- Anshum Gupta
