Hi Wei, I see two options: 1. create custom distance function for colors 2. split each color component to a separate numeric fields and try calculate distance function using standard set of functions. (I think that Solr does not support 3d points).
HTH, Emir -- Monitoring - Log Management - Alerting - Anomaly Detection Solr & Elasticsearch Consulting Support Training - http://sematext.com/ > On 14 Jul 2019, at 00:47, Wei <weiwan...@gmail.com> wrote: > > Any suggestion? > > On Thu, Jul 11, 2019 at 3:03 PM Wei <weiwan...@gmail.com> wrote: > >> Hi, >> >> I have a question regarding function query that operates on multi-value >> fields. For the following field: >> >> <field name=rgbcolor type="string" indexed="true" stored="true" >> multivalued="true"/> >> >> Each value is a hex string representation of RGB value. for example >> there are 3 values indexed >> >> #FF00FF - C1 >> #EE82EE - C2 >> #DA70D6 - C3 >> >> How would I write a function query that operates on all values of the >> field? Given color S in query, how to calculate the similarities between >> S and C1/C2/C3 and find which one is the closest? >> I checked https://lucene.apache.org/solr/guide/6_6/function-queries.html but >> didn't see an example. >> >> Thanks, >> Wei >>
