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Запрос на соответствие всем документам

Самый простой запрос, который соответствует всем документам, присваивая им всем _score значение 1.0.

$params = [
    'body' => [
        'query' => [
            'match_all' => [
            ],
        ],
    ],
];
$response = $client->search($params);

resp = client.search(
    query={
        "match_all": {}
    },
)
print(resp)

response = client.search(
  body: {
    query: {
      match_all: {}
    }
  }
)
puts response

res, err := es.Search(
	es.Search.WithBody(strings.NewReader(`{
	  "query": {
	    "match_all": {}
	  }
	}`)),
	es.Search.WithPretty(),
)
fmt.Println(res, err)

const response = await client.search({
  query: {
    match_all: {},
  },
});
console.log(response);

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

Значение _score можно изменить параметром boost:

resp = client.search(
    query={
        "match_all": {
            "boost": 1.2
        }
    },
)
print(resp)

response = client.search(
  body: {
    query: {
      match_all: {
        boost: 1.2
      }
    }
  }
)
puts response

res, err := es.Search(
	es.Search.WithBody(strings.NewReader(`{
	  "query": {
	    "match_all": {
	      "boost": 1.2
	    }
	  }
	}`)),
	es.Search.WithPretty(),
)
fmt.Println(res, err)

const response = await client.search({
  query: {
    match_all: {
      boost: 1.2,
    },
  },
});
console.log(response);

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

Запрос на соответствие ничему

Это обратное значение запроса match_all, который не соответствует ни одному документу.

resp = client.search(
    query={
        "match_none": {}
    },
)
print(resp)

response = client.search(
  body: {
    query: {
      match_none: {}
    }
  }
)
puts response

res, err := es.Search(
	es.Search.WithBody(strings.NewReader(`{
	  "query": {
	    "match_none": {}
	  }
	}`)),
	es.Search.WithPretty(),
)
fmt.Println(res, err)

const response = await client.search({
  query: {
    match_none: {},
  },
});
console.log(response);

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

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https://www.elastic.co/guide/en/elasticsearch/reference/8.17/query-dsl-match-all-query.html