Won't function queries do the job at query time? You can add or multiply the tf*idf score by a function of the term frequency of arbitrary terms, using the tf, mul, and add functions.
See: https://cwiki.apache.org/confluence/display/solr/Function+Queries -- Jack Krupansky On Sun, Jan 11, 2015 at 10:55 AM, Ali Nazemian <alinazem...@gmail.com> wrote: > Dear Jack, > Hi, > I think you misunderstood my need. I dont want to change the default > scoring behavior of Lucene (tf-idf) I just want to have another field to do > sorting for some specific queries (not all the search business), however I > am aware of Lucene payload. > Thank you very much. > > On Sun, Jan 11, 2015 at 7:15 PM, Jack Krupansky <jack.krupan...@gmail.com> > wrote: > > > You would do that with a custom similarity (scoring) class. That's an > > expert feature. In fact a SUPER-expert feature. > > > > Start by completely familiarizing yourself with how TF*IDF similarity > > already works: > > > > > http://lucene.apache.org/core/4_10_3/core/org/apache/lucene/search/similarities/TFIDFSimilarity.html > > > > And to use your custom similarity class in Solr: > > > > > https://cwiki.apache.org/confluence/display/solr/Other+Schema+Elements#OtherSchemaElements-Similarity > > > > > > -- Jack Krupansky > > > > On Sun, Jan 11, 2015 at 9:04 AM, Ali Nazemian <alinazem...@gmail.com> > > wrote: > > > > > Hi everybody, > > > > > > I am going to add some analysis to Solr at the index time. Here is > what I > > > am considering in my mind: > > > Suppose I have two different fields for Solr schema, field "a" and > field > > > "b". I am going to use the created reverse index in a way that some > terms > > > are considered as important ones and tell lucene to calculate a value > > based > > > on these terms frequency per each document. For example let the word > > > "hello" considered as important word with the weight of "2.0". Suppose > > the > > > term frequency for this word at field "a" is 3 and at field "b" is 6 > for > > > document 1. Therefor the score value would be 2*3+(2*6)^2. I want to > > > calculate this score based on these fields and put it in the index for > > > retrieving. My question would be how can I do such thing? First I did > > > consider using term component for calculating this value from outside > and > > > put it back to Solr index, but it seems it is not efficient enough. > > > > > > Thank you very much. > > > Best regards. > > > > > > -- > > > A.Nazemian > > > > > > > > > -- > A.Nazemian >
