我正在尝试建立一个包含has_parent连接的查询。我正在查询2种文档类型，重点是我希望始终将父级包括在内在返回的文档中。我正在使用inner_hits进行此操作，但无法通过突出显示来实现：

DELETE /my_index

PUT my_index
{
  "mappings": {
    "properties": {
      "name": {
        "type": "text"
      },"cc": { 
        "type": "join","relations": {
          "company": "employee" 
        }
      }
    }
  }
}

PUT my_index/_doc/1?refresh
{
  "name": "Walmart","cc": "company" 
}

PUT my_index/_doc/2?routing=1&refresh
{
  "name": "Smith","cc": {
    "name": "employee","parent": "1" 
  }
}

POST /my_index/_search
{
  "query": {
    "bool": {
      "must": [
        {
          "bool": {
            "should": [
              {
                "query_string": {
                  "default_operator": "and","fields": [
                    "name"
                  ],"query": "Walmart"
                }
              },{
                "has_parent": {
                  "inner_hits": {
                    "highlight": {
                      "fields": {
                        "name": {
                          "number_of_fragments": 20,"type": "plain"
                        }
                      }
                    }
                  },"parent_type": "company","query": {
                    "bool": {
                      "should": [
                        {
                          "query_string": {
                            "fields": [
                              "name"
                            ],"query": "Walmart"
                          }
                        }
                      ]
                    }
                  }
                }
              }
            ]
          }
        },{
          "has_parent": {
            "parent_type": "company","query": {
              "match_all": {}
            }
          }
        }
      ]
    }
  }
}

当我找到公司名称（ Walmart ）的员工时，inner_hits看起来像预期的那样：

...
"inner_hits" : {
  "company" : {
    "hits" : {
      "total" : {
        "value" : 1,"relation" : "eq"
      },"max_score" : 0.6931472,"hits" : [
        {
          "_index" : "my_index","_type" : "_doc","_id" : "1","_score" : 0.6931472,"_source" : {
            "name" : "Walmart","cc" : "company"
          },"highlight" : {
            "name" : [
              "<em>Walmart</em>"
            ]
          }
        }
      ]
    }
  }
}
...

当我按员工姓名（ Smith ）找到该员工时，inner_hits未填充：

...
"inner_hits" : {
  "company" : {
    "hits" : {
      "total" : {
        "value" : 0,"max_score" : null,"hits" : [ ]
    }
  }
}
...

我知道我可以在外部inner_hits连接处添加has_parent（以将结果限制为emnployee类型），但是我失去了突出显示的结果。并将inner_hits添加到两个has_parent联接中均以异常结束。我该怎么做才能始终获得完整的父文档（按需突出显示）？

我正在使用ElasticSearch 7.2