OpenSearch/docs/java-api/query-dsl/function-score-query.asciidoc

[[java-query-dsl-function-score-query]]
==== Function Score Query

See {ref}/query-dsl-function-score-query.html[Function Score Query].

To use `ScoreFunctionBuilders` just import them in your class:

[source,java]
--------------------------------------------------
import static org.elasticsearch.index.query.functionscore.ScoreFunctionBuilders.*;
--------------------------------------------------

[source,java]
--------------------------------------------------
FilterFunctionBuilder[] functions = {
        new FunctionScoreQueryBuilder.FilterFunctionBuilder(
                matchQuery("name", "kimchy"),                 <1>
                randomFunction("ABCDEF")),                    <2>
        new FunctionScoreQueryBuilder.FilterFunctionBuilder(
                exponentialDecayFunction("age", 0L, 1L))      <3>
};
QueryBuilder qb = QueryBuilders.functionScoreQuery(functions);
--------------------------------------------------
<1> Add a first function based on a query
<2> And randomize the score based on a given seed
<3> Add another function based on the age field