10 search languages -- match all searches

Get all documents

GET /_search
{
    "query": {
        "match_all": {}
    }
}

Get all documents and give a specified score

GET /_search
{
    "query": {
        "match_all": { "boost" : 1.2 }
    }
}

On the contrary, the following does not get any data

GET /_search
{
    "query": {
        "match_none": {}
    }
}