elasticsearch/docs/reference/query-dsl/constant-score-query.asciidoc

[[query-dsl-constant-score-query]]
=== Constant score query
++++
<titleabbrev>Constant score</titleabbrev>
++++

Wraps a <<query-dsl-bool-query, filter query>> and returns every matching
document with a <<relevance-scores,relevance score>> equal to the `boost`
parameter value.

[source,console]
----
GET /_search
{
    "query": {
        "constant_score" : {
            "filter" : {
                "term" : { "user" : "kimchy"}
            },
            "boost" : 1.2
        }
    }
}
----

[[constant-score-top-level-params]]
==== Top-level parameters for `constant_score`
`filter`::
+
--
(Required, query object) <<query-dsl-bool-query, Filter query>> you wish to run.
Any returned documents must match this query.

Filter queries do not calculate <<relevance-scores,relevance scores>>. To
speed up performance, {es} automatically caches frequently used filter queries.
--

`boost`::
(Optional, float) Floating point number used as the constant
<<relevance-scores,relevance score>> for every document matching the
`filter` query. Defaults to `1.0`.