为什么 'exists' 对正常查询失败而不对过滤查询失败？

Question

考虑以下两个查询：

{
  "_source" : false,
  "query": {
    "bool": {
      "must": [
        {
          "range": {
            "date": {
              "gte": 1460789348000,
              "lte": 1466059748000
            }
          }
        }
      ]
    }
  }
}

现在考虑添加了 filtered 和 filter 字段的以下查询：

{
  "_source": false,
  "query": {
    "filtered": {
      "filter": {
        "bool": {
          "must": [
            {
              "range": {
                "date": {
                  "gte": 1460789348000,
                  "lte": 1466059748000
                }
              }
            }
          ]
        }
      }
    }
  }
}

两者都给出相同的结果，并且没有 filtered 和 filter 字段的第一个查询不会导致错误，这与以下查询不同：

{
  "_source": false,
  "query": {
    "bool": {
      "must": [
        {
          "exists": {
            "field": "comment"
          }
        }
      ]
    }
  }
}

错误：

{
"error": "SearchPhaseExecutionException[Failed to execute phase [query], all shards failed; shardFailures {[bi8BrruxR9i_H8-n4Qo9Mg][acct_prop_5][0]: RemoteTransportException[[Battletide][inet[/172.16.0.11:9302]][indices:data/read/search[phase/query]]]; nested: SearchParseException[[acct_prop_5][0]: from[-1],size[-1]: Parse Failure [Failed to parse source [{"_source":false,"query":{"bool":{"must":[{"exists":{"field":"comment"}}]}}}]]]; nested: QueryParsingException[[acct_prop_5] No query registered for [exists]]; }{[JorHtifCSxGrbb3ovGJMWQ][advocacy_insights_p5_v1_00000000_0000][0]: RemoteTransportException[[Caiera][inet[/172.16.0.11:9304]][indices:data/read/search[phase/query]]]; nested: SearchParseException[[advocacy_insights_p5_v1_00000000_0000][0]: from[-1],size[-1]: Parse Failure [Failed to parse source [{"_source":false,"query":{"bool":{"must":[{"exists":{"field":"comment"}}]}}}]]]; nested: QueryParsingException[[advocacy_insights_p5_v1_00000000_0000] No query registered for [exists]]; }{[Tlt3tXF_S9-rEmK9iwSvoA][audience_act_p5_v2_00000000_0000][0]: RemoteTransportException[[Monet St. Croix][inet[/172.16.0.11:9303]][indices:data/read/search[phase/query]]]; nested: SearchParseException[[audience_act_p5_v2_00000000_0000][0]: from[-1],size[-1]: Parse Failure [Failed to parse source [{"_source":false,"query":{"bool":{"must":[{"exists":{"field":"comment"}}]}}}]]]; nested: QueryParsingException[[audience_act_p5_v2_00000000_0000] No query registered for [exists]]; }{[NTpZwKeYRI6l6zHf2BlIFg][audience_act_p5_v3_00000000_0000][0]: SearchParseException[[audience_act_p5_v3_00000000_0000][0]: from[-1],size[-1]: Parse Failure [Failed to parse source [{"_source":false,"query":{"bool":{"must":[{"exists":{"field":"comment"}}]}}}]]]; nested: QueryParsingException[[audience_act_p5_v3_00000000_0000] No query registered for [exists]]; }{[NTpZwKeYRI6l6zHf2BlIFg][audience_act_p5_v3_20150601_0000][0]: SearchParseException[[audience_act_p5_v3_20150601_0000][0]: from[-1],size[-1]: Parse Failure [Failed to parse source [{"_source":false,"query":{"bool":{"must":[{"exists":{"field":"comment"}}]}}}]]]; nested: QueryParsingException[[audience_act_p5_v3_20150601_0000] No query registered for [exists]]; }{[Tlt3tXF_S9-rEmK9iwSvoA][auth2][0]: RemoteTransportException[[Monet St. Croix][inet[/172.16.0.11:9303]][indices:data/read/search[phase/query]]]; nested: SearchParseException[[auth2][0]: from[-1],size[-1]: Parse Failure [Failed to parse source [{"_source":false,"query":{"bool":{"must":[{"exists":{"field":"comment"}}]}}}]]]; nested: QueryParsingException[[auth2] No query registered for [exists]]; }{[JorHtifCSxGrbb3ovGJMWQ][authors][0]: RemoteTransportException[[Caiera][inet[/172.16.0.11:9304]][indices:data/read/search[phase/query]]]; nested: SearchParseException[[authors][0]: from[-1],size[-1]: Parse Failure [Failed to parse source [{"_source":false,"query":{"bool":{"must":[{"exists":{"field":"comment"}}]}}}]]]; nested: QueryParsingException[[authors] No query registered for [exists]]; }{[bi8BrruxR9i_H8-n4Qo9Mg][bm_content_lifetime_p5_v1_00000000_0000][0]: RemoteTransportException[[Battletide][inet[/172.16.0.11:9302]][indices:data/read/search[phase/query]]]; nested: SearchParseException[[bm_content_lifetime_p5_v1_00000000_0000][0]: from[-1],size[-1]: Parse Failure [Failed to parse source [{"_source":false,"query":{"bool":{"must":[{"exists":{"field":"comment"}}]}}}]]]; nested: QueryParsingException[[bm_content_lifetime_p5_v1_00000000_0000] No query registered for [exists]]; }{[NTpZwKeYRI6l6zHf2BlIFg][bm_content_lifetime_p5_v2_00000000_0000][0]: SearchParseException[[bm_content_lifetime_p5_v2_00000000_0000][0]: from[-1],size[-1]: Parse Failure [Failed to parse source [{"_source":false,"query":{"bool":{"must":[{"exists":{"field":"comment"}}]}}}]]]; nested: QueryParsingException[[bm_content_lifetime_p5_v2_00000000_0000] No query registered for [exists]]; }{[bi8BrruxR9i_H8-n4Qo9Mg][bm_content_lifetime_p5_v93_00000000_0000][0]: RemoteTransportException[[Battletide][inet[/172.16.0.11:9302]][indices:data/read/search[phase/query]]]; nested: SearchParseException[[bm_content_lifetime_p5_v93_00000000_0000][0]: from[-1],size[-1]: Parse Failure [Failed to parse source [{"_source":false,"query":{"bool":{"must":[{"exists":{"field":"comment"}}]}}}]]]; nested: .........

而对于这两个字段，它成为一个正确的查询：

{
  "_source": false,
  "query": {
    "filtered": {
      "filter": {
        "bool": {
          "must": [
            {
              "exists": {
                "field": "comment"
              }
            }
          ]
        }
      }
    }
  }
}

range 和 exists 查询之间有什么区别，只允许一个查询在没有 filtered 和 filter 字段的情况下有效？

Answer 1

您可能必须使用旧版本的 Elasticsearch [version < 2.0] 其中 exists 是一个过滤器。有 no exists 查询，这就是您收到错误消息的原因：No query registered for [exists].

您可以使用：

{
   "_source": false,
   "filter": {
      "bool": {
         "must": [
            {
               "exists": {
                  "field": "comment"
               }
            }
         ]
      }
   }
}

或者简单地说：

{
   "_source": false,
   "filter": {
      "exists": {
         "field": "comment"
      }
   }
}

从 Elasticsearch 2.0 版本开始，query 和 filter 对象已经合并在一起，只存在 query 能够执行这两种功能的对象。因此，从 2.0 版开始，您可以使用 exists 查询。

您可以在以下位置阅读有关合并的更多信息：Better query execution coming to Elasticsearch 2.0

为什么 'exists' 对正常查询失败而不对过滤查询失败？

Why does 'exists' fail for normal queries and not for filtered queries?

filter

querydsl

elasticsearch