[[query-dsl-exists-filter]]
=== Exists Filter

Filters documents where a specific field has a value in them.

[source,js]
--------------------------------------------------
{
    "constant_score" : {
        "filter" : {
            "exists" : { "field" : "user" }
        }
    }
}
--------------------------------------------------

[float]
==== Caching

The result of the filter is always cached.
