[[query-dsl-constant-score-query]]
=== Constant Score Query

A query that wraps a filter or another query and simply returns a
constant score equal to the query boost for every document in the
filter. Maps to Lucene `ConstantScoreQuery`.

[source,js]
--------------------------------------------------
{
    "constant_score" : {
        "filter" : {
            "term" : { "user" : "kimchy"}
        },
        "boost" : 1.2
    }
}
--------------------------------------------------

The filter object can hold only filter elements, not queries. Filters
can be much faster compared to queries since they don't perform any
scoring, especially when they are cached.

A query can also be wrapped in a `constant_score` query:

[source,js]
--------------------------------------------------
{
    "constant_score" : {
        "query" : {
            "term" : { "user" : "kimchy"}
        },
        "boost" : 1.2
    }
}
--------------------------------------------------
