OpenSearch/docs/reference/query-dsl/match-all-query.asciidoc

[[query-dsl-match-all-query]]
== Match all query
++++
<titleabbrev>Match all</titleabbrev>
++++

The most simple query, which matches all documents, giving them all a `_score`
of `1.0`.

[source,console]
--------------------------------------------------
GET /_search
{ 
    "query": {
        "match_all": {}
    }
}
--------------------------------------------------

The `_score` can be changed with the `boost` parameter:

[source,console]
--------------------------------------------------
GET /_search
{
    "query": {
        "match_all": { "boost" : 1.2 }
    }
}
--------------------------------------------------

[[query-dsl-match-none-query]]
[float]
== Match None Query

This is the inverse of the `match_all` query, which matches no documents.

[source,console]
--------------------------------------------------
GET /_search
{
    "query": {
        "match_none": {} 
    }
}
--------------------------------------------------