Example Query

POST /users/user/_search
{
    "from": 0,
    "min_score": 0,
    "query": {
        "function_score": {
            "boost": "1",
            "boost_mode": "replace",
            "query": {
                "has_child": {
                    "boost": 1,
                    "query": {
                        "constant_score": {
                            "boost": 1,
                            "query": {
                                "match": {
                                    "dc67f533_mf_pc_text": {
                                        "query": "P"
                                    }
                                }
                            }
                        }
                    },
                    "score_type": "sum",
                    "type": "mf_dc67f533"
                }
            },
            "script_score": {
                "script": "_score >= 1 ? 1 : 0"
            }
        }
    },
    "size": 0
}