Search exactly value of field in solr

Question

I have table "class". This class has a field: "numStudents". I indexed numStudents field.

Now I want to search all classes have numStudents = 10, for example. How can I do this?

Please give me easiest way, modify solrconfig.xml or schema.xml is good for me. Thanks!

Answer 1

You probably want to filter out all the classes which has 10 students without actually scoring the documents.
You can use the Filter Query fq=numStudents:10 to filter out the classes.
FilterQuery is able to take advantage of the FilterCache, which would be a huge performance boost in comparison to your queries.