如何过滤simple_query_string/query_string查询

指数：

{
    "settings": {
        "index.percolator.map_unmapped_fields_as_text": true,
    },
    "mappings": {
        "properties": {
            "query": {
                "type": "percolator"
            }
        }
    }
}

此测试过滤器查询有效

{
    "query": {
        "match": {
            "message": "blah"
        }
    }
}

此查询不起作用

{
    "query": {
        "simple_query_string": {
            "query": "bl*"
        }
    }
}

结果：

{"took":15,"timed_out":false,"_shards":{"total":5,"successful":5,"skipped":0,"failed":0},"hits":{"total":{"value":1,"relation":"eq"},"max_score":0.13076457,"hits":[{"_index":"my-index","_type":"_doc","_id":"1","_score":0.13076457,"_source":{"query":{"match":{"message":"blah"}}},"fields":{"_percolator_document_slot":[0]}}]}}

为什么此simple_query_string查询与文档不匹配？