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Multi-match query

edit

Multi-match query

edit

The multi_match query builds on the match query to allow multi-field queries:

$params = [
    'body' => [
        'query' => [
            'multi_match' => [
                'query' => 'this is a test',
                'fields' => [
                    'subject',
                    'message',
                ],
            ],
        ],
    ],
];
$response = $client->search($params);

resp = client.search(
    body={
        "query": {
            "multi_match": {
                "query": "this is a test",
                "fields": ["subject", "message"],
            }
        }
    },
)
print(resp)

response = client.search(
  body: {
    query: {
      multi_match: {
        query: 'this is a test',
        fields: [
          'subject',
          'message'
        ]
      }
    }
  }
)
puts response

res, err := es.Search(
	es.Search.WithBody(strings.NewReader(`{
	  "query": {
	    "multi_match": {
	      "query": "this is a test",
	      "fields": [
	        "subject",
	        "message"
	      ]
	    }
	  }
	}`)),
	es.Search.WithPretty(),
)
fmt.Println(res, err)

const response = await client.search({
  body: {
    query: {
      multi_match: {
        query: 'this is a test',
        fields: [
          'subject',
          'message'
        ]
      }
    }
  }
})
console.log(response)

GET /_search
{
  "query": {
    "multi_match" : {
      "query":    "this is a test", 
      "fields": [ "subject", "message" ] 
    }
  }
}

	The query string.
	The fields to be queried.

`fields` and per-field boosting

edit

Fields can be specified with wildcards, eg:

$params = [
    'body' => [
        'query' => [
            'multi_match' => [
                'query' => 'Will Smith',
                'fields' => [
                    'title',
                    '*_name',
                ],
            ],
        ],
    ],
];
$response = $client->search($params);

resp = client.search(
    body={
        "query": {
            "multi_match": {
                "query": "Will Smith",
                "fields": ["title", "*_name"],
            }
        }
    },
)
print(resp)

response = client.search(
  body: {
    query: {
      multi_match: {
        query: 'Will Smith',
        fields: [
          'title',
          '*_name'
        ]
      }
    }
  }
)
puts response

res, err := es.Search(
	es.Search.WithBody(strings.NewReader(`{
	  "query": {
	    "multi_match": {
	      "query": "Will Smith",
	      "fields": [
	        "title",
	        "*_name"
	      ]
	    }
	  }
	}`)),
	es.Search.WithPretty(),
)
fmt.Println(res, err)

const response = await client.search({
  body: {
    query: {
      multi_match: {
        query: 'Will Smith',
        fields: [
          'title',
          '*_name'
        ]
      }
    }
  }
})
console.log(response)

GET /_search
{
  "query": {
    "multi_match" : {
      "query":    "Will Smith",
      "fields": [ "title", "*_name" ] 
    }
  }
}

Query the title, first_name and last_name fields.

Individual fields can be boosted with the caret (^) notation:

$params = [
    'body' => [
        'query' => [
            'multi_match' => [
                'query' => 'this is a test',
                'fields' => [
                    'subject^3',
                    'message',
                ],
            ],
        ],
    ],
];
$response = $client->search($params);

resp = client.search(
    body={
        "query": {
            "multi_match": {
                "query": "this is a test",
                "fields": ["subject^3", "message"],
            }
        }
    },
)
print(resp)

response = client.search(
  body: {
    query: {
      multi_match: {
        query: 'this is a test',
        fields: [
          'subject^3',
          'message'
        ]
      }
    }
  }
)
puts response

res, err := es.Search(
	es.Search.WithBody(strings.NewReader(`{
	  "query": {
	    "multi_match": {
	      "query": "this is a test",
	      "fields": [
	        "subject^3",
	        "message"
	      ]
	    }
	  }
	}`)),
	es.Search.WithPretty(),
)
fmt.Println(res, err)

const response = await client.search({
  body: {
    query: {
      multi_match: {
        query: 'this is a test',
        fields: [
          'subject^3',
          'message'
        ]
      }
    }
  }
})
console.log(response)

GET /_search
{
  "query": {
    "multi_match" : {
      "query" : "this is a test",
      "fields" : [ "subject^3", "message" ] 
    }
  }
}

The query multiplies the subject field’s score by three but leaves the message field’s score unchanged.

If no fields are provided, the multi_match query defaults to the index.query.default_field index settings, which in turn defaults to *. * extracts all fields in the mapping that are eligible to term queries and filters the metadata fields. All extracted fields are then combined to build a query.

Field number limit

By default, there is a limit to the number of clauses a query can contain. This limit is defined by the indices.query.bool.max_clause_count setting, which defaults to 4096. For multi-match queries, the number of clauses is calculated as the number of fields multiplied by the number of terms.

Types of `multi_match` query:

edit

The way the multi_match query is executed internally depends on the type parameter, which can be set to:

`best_fields`	(default) Finds documents which match any field, but uses the `_score` from the best field. See `best_fields`.
`most_fields`	Finds documents which match any field and combines the `_score` from each field. See `most_fields`.
`cross_fields`	Treats fields with the same `analyzer` as though they were one big field. Looks for each word in any field. See `cross_fields`.
`phrase`	Runs a `match_phrase` query on each field and uses the `_score` from the best field. See `phrase` and `phrase_prefix`.
`phrase_prefix`	Runs a `match_phrase_prefix` query on each field and uses the `_score` from the best field. See `phrase` and `phrase_prefix`.
`bool_prefix`	Creates a `match_bool_prefix` query on each field and combines the `_score` from each field. See `bool_prefix`.

`best_fields`

edit

The best_fields type is most useful when you are searching for multiple words best found in the same field. For instance “brown fox” in a single field is more meaningful than “brown” in one field and “fox” in the other.

The best_fields type generates a match query for each field and wraps them in a dis_max query, to find the single best matching field. For instance, this query:

$params = [
    'body' => [
        'query' => [
            'multi_match' => [
                'query' => 'brown fox',
                'type' => 'best_fields',
                'fields' => [
                    'subject',
                    'message',
                ],
                'tie_breaker' => 0.3,
            ],
        ],
    ],
];
$response = $client->search($params);

resp = client.search(
    body={
        "query": {
            "multi_match": {
                "query": "brown fox",
                "type": "best_fields",
                "fields": ["subject", "message"],
                "tie_breaker": 0.3,
            }
        }
    },
)
print(resp)

response = client.search(
  body: {
    query: {
      multi_match: {
        query: 'brown fox',
        type: 'best_fields',
        fields: [
          'subject',
          'message'
        ],
        tie_breaker: 0.3
      }
    }
  }
)
puts response

res, err := es.Search(
	es.Search.WithBody(strings.NewReader(`{
	  "query": {
	    "multi_match": {
	      "query": "brown fox",
	      "type": "best_fields",
	      "fields": [
	        "subject",
	        "message"
	      ],
	      "tie_breaker": 0.3
	    }
	  }
	}`)),
	es.Search.WithPretty(),
)
fmt.Println(res, err)

const response = await client.search({
  body: {
    query: {
      multi_match: {
        query: 'brown fox',
        type: 'best_fields',
        fields: [
          'subject',
          'message'
        ],
        tie_breaker: 0.3
      }
    }
  }
})
console.log(response)

GET /_search
{
  "query": {
    "multi_match" : {
      "query":      "brown fox",
      "type":       "best_fields",
      "fields":     [ "subject", "message" ],
      "tie_breaker": 0.3
    }
  }
}

would be executed as:

$params = [
    'body' => [
        'query' => [
            'dis_max' => [
                'queries' => [
                    [
                        'match' => [
                            'subject' => 'brown fox',
                        ],
                    ],
                    [
                        'match' => [
                            'message' => 'brown fox',
                        ],
                    ],
                ],
                'tie_breaker' => 0.3,
            ],
        ],
    ],
];
$response = $client->search($params);

resp = client.search(
    body={
        "query": {
            "dis_max": {
                "queries": [
                    {"match": {"subject": "brown fox"}},
                    {"match": {"message": "brown fox"}},
                ],
                "tie_breaker": 0.3,
            }
        }
    },
)
print(resp)

response = client.search(
  body: {
    query: {
      dis_max: {
        queries: [
          {
            match: {
              subject: 'brown fox'
            }
          },
          {
            match: {
              message: 'brown fox'
            }
          }
        ],
        tie_breaker: 0.3
      }
    }
  }
)
puts response

res, err := es.Search(
	es.Search.WithBody(strings.NewReader(`{
	  "query": {
	    "dis_max": {
	      "queries": [
	        {
	          "match": {
	            "subject": "brown fox"
	          }
	        },
	        {
	          "match": {
	            "message": "brown fox"
	          }
	        }
	      ],
	      "tie_breaker": 0.3
	    }
	  }
	}`)),
	es.Search.WithPretty(),
)
fmt.Println(res, err)

const response = await client.search({
  body: {
    query: {
      dis_max: {
        queries: [
          {
            match: {
              subject: 'brown fox'
            }
          },
          {
            match: {
              message: 'brown fox'
            }
          }
        ],
        tie_breaker: 0.3
      }
    }
  }
})
console.log(response)

GET /_search
{
  "query": {
    "dis_max": {
      "queries": [
        { "match": { "subject": "brown fox" }},
        { "match": { "message": "brown fox" }}
      ],
      "tie_breaker": 0.3
    }
  }
}

Normally the best_fields type uses the score of the single best matching field, but if tie_breaker is specified, then it calculates the score as follows:

the score from the best matching field
plus tie_breaker * _score for all other matching fields

Also, accepts analyzer, boost, operator, minimum_should_match, fuzziness, lenient, prefix_length, max_expansions, fuzzy_rewrite, zero_terms_query, auto_generate_synonyms_phrase_query and fuzzy_transpositions, as explained in match query.

operator and minimum_should_match

The best_fields and most_fields types are field-centric — they generate a match query per field. This means that the operator and minimum_should_match parameters are applied to each field individually, which is probably not what you want.

Take this query for example:

$params = [
    'body' => [
        'query' => [
            'multi_match' => [
                'query' => 'Will Smith',
                'type' => 'best_fields',
                'fields' => [
                    'first_name',
                    'last_name',
                ],
                'operator' => 'and',
            ],
        ],
    ],
];
$response = $client->search($params);

resp = client.search(
    body={
        "query": {
            "multi_match": {
                "query": "Will Smith",
                "type": "best_fields",
                "fields": ["first_name", "last_name"],
                "operator": "and",
            }
        }
    },
)
print(resp)

response = client.search(
  body: {
    query: {
      multi_match: {
        query: 'Will Smith',
        type: 'best_fields',
        fields: [
          'first_name',
          'last_name'
        ],
        operator: 'and'
      }
    }
  }
)
puts response

res, err := es.Search(
	es.Search.WithBody(strings.NewReader(`{
	  "query": {
	    "multi_match": {
	      "query": "Will Smith",
	      "type": "best_fields",
	      "fields": [
	        "first_name",
	        "last_name"
	      ],
	      "operator": "and"
	    }
	  }
	}`)),
	es.Search.WithPretty(),
)
fmt.Println(res, err)

const response = await client.search({
  body: {
    query: {
      multi_match: {
        query: 'Will Smith',
        type: 'best_fields',
        fields: [
          'first_name',
          'last_name'
        ],
        operator: 'and'
      }
    }
  }
})
console.log(response)

GET /_search
{
  "query": {
    "multi_match" : {
      "query":      "Will Smith",
      "type":       "best_fields",
      "fields":     [ "first_name", "last_name" ],
      "operator":   "and" 
    }
  }
}

All terms must be present.

This query is executed as:

  (+first_name:will +first_name:smith)
| (+last_name:will  +last_name:smith)

In other words, all terms must be present in a single field for a document to match.

The combined_fields query offers a term-centric approach that handles operator and minimum_should_match on a per-term basis. The other multi-match mode cross_fields also addresses this issue.

`most_fields`

edit

The most_fields type is most useful when querying multiple fields that contain the same text analyzed in different ways. For instance, the main field may contain synonyms, stemming and terms without diacritics. A second field may contain the original terms, and a third field might contain shingles. By combining scores from all three fields we can match as many documents as possible with the main field, but use the second and third fields to push the most similar results to the top of the list.

This query:

$params = [
    'body' => [
        'query' => [
            'multi_match' => [
                'query' => 'quick brown fox',
                'type' => 'most_fields',
                'fields' => [
                    'title',
                    'title.original',
                    'title.shingles',
                ],
            ],
        ],
    ],
];
$response = $client->search($params);

resp = client.search(
    body={
        "query": {
            "multi_match": {
                "query": "quick brown fox",
                "type": "most_fields",
                "fields": ["title", "title.original", "title.shingles"],
            }
        }
    },
)
print(resp)

response = client.search(
  body: {
    query: {
      multi_match: {
        query: 'quick brown fox',
        type: 'most_fields',
        fields: [
          'title',
          'title.original',
          'title.shingles'
        ]
      }
    }
  }
)
puts response

res, err := es.Search(
	es.Search.WithBody(strings.NewReader(`{
	  "query": {
	    "multi_match": {
	      "query": "quick brown fox",
	      "type": "most_fields",
	      "fields": [
	        "title",
	        "title.original",
	        "title.shingles"
	      ]
	    }
	  }
	}`)),
	es.Search.WithPretty(),
)
fmt.Println(res, err)

const response = await client.search({
  body: {
    query: {
      multi_match: {
        query: 'quick brown fox',
        type: 'most_fields',
        fields: [
          'title',
          'title.original',
          'title.shingles'
        ]
      }
    }
  }
})
console.log(response)

GET /_search
{
  "query": {
    "multi_match" : {
      "query":      "quick brown fox",
      "type":       "most_fields",
      "fields":     [ "title", "title.original", "title.shingles" ]
    }
  }
}

would be executed as:

$params = [
    'body' => [
        'query' => [
            'bool' => [
                'should' => [
                    [
                        'match' => [
                            'title' => 'quick brown fox',
                        ],
                    ],
                    [
                        'match' => [
                            'title.original' => 'quick brown fox',
                        ],
                    ],
                    [
                        'match' => [
                            'title.shingles' => 'quick brown fox',
                        ],
                    ],
                ],
            ],
        ],
    ],
];
$response = $client->search($params);

resp = client.search(
    body={
        "query": {
            "bool": {
                "should": [
                    {"match": {"title": "quick brown fox"}},
                    {"match": {"title.original": "quick brown fox"}},
                    {"match": {"title.shingles": "quick brown fox"}},
                ]
            }
        }
    },
)
print(resp)

response = client.search(
  body: {
    query: {
      bool: {
        should: [
          {
            match: {
              title: 'quick brown fox'
            }
          },
          {
            match: {
              "title.original": 'quick brown fox'
            }
          },
          {
            match: {
              "title.shingles": 'quick brown fox'
            }
          }
        ]
      }
    }
  }
)
puts response

res, err := es.Search(
	es.Search.WithBody(strings.NewReader(`{
	  "query": {
	    "bool": {
	      "should": [
	        {
	          "match": {
	            "title": "quick brown fox"
	          }
	        },
	        {
	          "match": {
	            "title.original": "quick brown fox"
	          }
	        },
	        {
	          "match": {
	            "title.shingles": "quick brown fox"
	          }
	        }
	      ]
	    }
	  }
	}`)),
	es.Search.WithPretty(),
)
fmt.Println(res, err)

const response = await client.search({
  body: {
    query: {
      bool: {
        should: [
          {
            match: {
              title: 'quick brown fox'
            }
          },
          {
            match: {
              'title.original': 'quick brown fox'
            }
          },
          {
            match: {
              'title.shingles': 'quick brown fox'
            }
          }
        ]
      }
    }
  }
})
console.log(response)

GET /_search
{
  "query": {
    "bool": {
      "should": [
        { "match": { "title":          "quick brown fox" }},
        { "match": { "title.original": "quick brown fox" }},
        { "match": { "title.shingles": "quick brown fox" }}
      ]
    }
  }
}

The score from each match clause is added together, then divided by the number of match clauses.

Also, accepts analyzer, boost, operator, minimum_should_match, fuzziness, lenient, prefix_length, max_expansions, fuzzy_rewrite, and zero_terms_query.

`phrase` and `phrase_prefix`

edit

The phrase and phrase_prefix types behave just like best_fields, but they use a match_phrase or match_phrase_prefix query instead of a match query.

This query:

$params = [
    'body' => [
        'query' => [
            'multi_match' => [
                'query' => 'quick brown f',
                'type' => 'phrase_prefix',
                'fields' => [
                    'subject',
                    'message',
                ],
            ],
        ],
    ],
];
$response = $client->search($params);

resp = client.search(
    body={
        "query": {
            "multi_match": {
                "query": "quick brown f",
                "type": "phrase_prefix",
                "fields": ["subject", "message"],
            }
        }
    },
)
print(resp)

response = client.search(
  body: {
    query: {
      multi_match: {
        query: 'quick brown f',
        type: 'phrase_prefix',
        fields: [
          'subject',
          'message'
        ]
      }
    }
  }
)
puts response

res, err := es.Search(
	es.Search.WithBody(strings.NewReader(`{
	  "query": {
	    "multi_match": {
	      "query": "quick brown f",
	      "type": "phrase_prefix",
	      "fields": [
	        "subject",
	        "message"
	      ]
	    }
	  }
	}`)),
	es.Search.WithPretty(),
)
fmt.Println(res, err)

const response = await client.search({
  body: {
    query: {
      multi_match: {
        query: 'quick brown f',
        type: 'phrase_prefix',
        fields: [
          'subject',
          'message'
        ]
      }
    }
  }
})
console.log(response)

GET /_search
{
  "query": {
    "multi_match" : {
      "query":      "quick brown f",
      "type":       "phrase_prefix",
      "fields":     [ "subject", "message" ]
    }
  }
}

would be executed as:

$params = [
    'body' => [
        'query' => [
            'dis_max' => [
                'queries' => [
                    [
                        'match_phrase_prefix' => [
                            'subject' => 'quick brown f',
                        ],
                    ],
                    [
                        'match_phrase_prefix' => [
                            'message' => 'quick brown f',
                        ],
                    ],
                ],
            ],
        ],
    ],
];
$response = $client->search($params);

resp = client.search(
    body={
        "query": {
            "dis_max": {
                "queries": [
                    {"match_phrase_prefix": {"subject": "quick brown f"}},
                    {"match_phrase_prefix": {"message": "quick brown f"}},
                ]
            }
        }
    },
)
print(resp)

response = client.search(
  body: {
    query: {
      dis_max: {
        queries: [
          {
            match_phrase_prefix: {
              subject: 'quick brown f'
            }
          },
          {
            match_phrase_prefix: {
              message: 'quick brown f'
            }
          }
        ]
      }
    }
  }
)
puts response

res, err := es.Search(
	es.Search.WithBody(strings.NewReader(`{
	  "query": {
	    "dis_max": {
	      "queries": [
	        {
	          "match_phrase_prefix": {
	            "subject": "quick brown f"
	          }
	        },
	        {
	          "match_phrase_prefix": {
	            "message": "quick brown f"
	          }
	        }
	      ]
	    }
	  }
	}`)),
	es.Search.WithPretty(),
)
fmt.Println(res, err)

const response = await client.search({
  body: {
    query: {
      dis_max: {
        queries: [
          {
            match_phrase_prefix: {
              subject: 'quick brown f'
            }
          },
          {
            match_phrase_prefix: {
              message: 'quick brown f'
            }
          }
        ]
      }
    }
  }
})
console.log(response)

GET /_search
{
  "query": {
    "dis_max": {
      "queries": [
        { "match_phrase_prefix": { "subject": "quick brown f" }},
        { "match_phrase_prefix": { "message": "quick brown f" }}
      ]
    }
  }
}

Also, accepts analyzer, boost, lenient and zero_terms_query as explained in Match, as well as slop which is explained in Match phrase. Type phrase_prefix additionally accepts max_expansions.

phrase, phrase_prefix and fuzziness

The fuzziness parameter cannot be used with the phrase or phrase_prefix type.

`cross_fields`

edit

The cross_fields type is particularly useful with structured documents where multiple fields should match. For instance, when querying the first_name and last_name fields for “Will Smith”, the best match is likely to have “Will” in one field and “Smith” in the other.

This sounds like a job for most_fields but there are two problems with that approach. The first problem is that operator and minimum_should_match are applied per-field, instead of per-term (see explanation above).

The second problem is to do with relevance: the different term frequencies in the first_name and last_name fields can produce unexpected results.

For instance, imagine we have two people: “Will Smith” and “Smith Jones”. “Smith” as a last name is very common (and so is of low importance) but “Smith” as a first name is very uncommon (and so is of great importance).

If we do a search for “Will Smith”, the “Smith Jones” document will probably appear above the better matching “Will Smith” because the score of first_name:smith has trumped the combined scores of first_name:will plus last_name:smith.

One way of dealing with these types of queries is simply to index the first_name and last_name fields into a single full_name field. Of course, this can only be done at index time.

The cross_field type tries to solve these problems at query time by taking a term-centric approach. It first analyzes the query string into individual terms, then looks for each term in any of the fields, as though they were one big field.

A query like:

$params = [
    'body' => [
        'query' => [
            'multi_match' => [
                'query' => 'Will Smith',
                'type' => 'cross_fields',
                'fields' => [
                    'first_name',
                    'last_name',
                ],
                'operator' => 'and',
            ],
        ],
    ],
];
$response = $client->search($params);

resp = client.search(
    body={
        "query": {
            "multi_match": {
                "query": "Will Smith",
                "type": "cross_fields",
                "fields": ["first_name", "last_name"],
                "operator": "and",
            }
        }
    },
)
print(resp)

response = client.search(
  body: {
    query: {
      multi_match: {
        query: 'Will Smith',
        type: 'cross_fields',
        fields: [
          'first_name',
          'last_name'
        ],
        operator: 'and'
      }
    }
  }
)
puts response

res, err := es.Search(
	es.Search.WithBody(strings.NewReader(`{
	  "query": {
	    "multi_match": {
	      "query": "Will Smith",
	      "type": "cross_fields",
	      "fields": [
	        "first_name",
	        "last_name"
	      ],
	      "operator": "and"
	    }
	  }
	}`)),
	es.Search.WithPretty(),
)
fmt.Println(res, err)

const response = await client.search({
  body: {
    query: {
      multi_match: {
        query: 'Will Smith',
        type: 'cross_fields',
        fields: [
          'first_name',
          'last_name'
        ],
        operator: 'and'
      }
    }
  }
})
console.log(response)

GET /_search
{
  "query": {
    "multi_match" : {
      "query":      "Will Smith",
      "type":       "cross_fields",
      "fields":     [ "first_name", "last_name" ],
      "operator":   "and"
    }
  }
}

is executed as:

+(first_name:will last_name:will)
+(first_name:smith last_name:smith)

In other words, all terms must be present in at least one field for a document to match. (Compare this to the logic used for best_fields and most_fields.)

That solves one of the two problems. The problem of differing term frequencies is solved by blending the term frequencies for all fields in order to even out the differences.

In practice, first_name:smith will be treated as though it has the same frequencies as last_name:smith, plus one. This will make matches on first_name and last_name have comparable scores, with a tiny advantage for last_name since it is the most likely field that contains smith.

Note that cross_fields is usually only useful on short string fields that all have a boost of 1. Otherwise boosts, term freqs and length normalization contribute to the score in such a way that the blending of term statistics is not meaningful anymore.

If you run the above query through the Validate, it returns this explanation:

+blended("will",  fields: [first_name, last_name])
+blended("smith", fields: [first_name, last_name])

Also, accepts analyzer, boost, operator, minimum_should_match, lenient and zero_terms_query.

The cross_fields type blends field statistics in a complex way that can be hard to interpret. The score combination can even be incorrect, in particular when some documents contain some of the search fields, but not all of them. You should consider the combined_fields query as an alternative, which is also term-centric but combines field statistics in a more robust way.

`cross_field` and analysis

edit

The cross_field type can only work in term-centric mode on fields that have the same analyzer. Fields with the same analyzer are grouped together as in the example above. If there are multiple groups, the query will use the best score from any group.

For instance, if we have a first and last field which have the same analyzer, plus a first.edge and last.edge which both use an edge_ngram analyzer, this query:

$params = [
    'body' => [
        'query' => [
            'multi_match' => [
                'query' => 'Jon',
                'type' => 'cross_fields',
                'fields' => [
                    'first',
                    'first.edge',
                    'last',
                    'last.edge',
                ],
            ],
        ],
    ],
];
$response = $client->search($params);

resp = client.search(
    body={
        "query": {
            "multi_match": {
                "query": "Jon",
                "type": "cross_fields",
                "fields": ["first", "first.edge", "last", "last.edge"],
            }
        }
    },
)
print(resp)

response = client.search(
  body: {
    query: {
      multi_match: {
        query: 'Jon',
        type: 'cross_fields',
        fields: [
          'first',
          'first.edge',
          'last',
          'last.edge'
        ]
      }
    }
  }
)
puts response

res, err := es.Search(
	es.Search.WithBody(strings.NewReader(`{
	  "query": {
	    "multi_match": {
	      "query": "Jon",
	      "type": "cross_fields",
	      "fields": [
	        "first",
	        "first.edge",
	        "last",
	        "last.edge"
	      ]
	    }
	  }
	}`)),
	es.Search.WithPretty(),
)
fmt.Println(res, err)

const response = await client.search({
  body: {
    query: {
      multi_match: {
        query: 'Jon',
        type: 'cross_fields',
        fields: [
          'first',
          'first.edge',
          'last',
          'last.edge'
        ]
      }
    }
  }
})
console.log(response)

GET /_search
{
  "query": {
    "multi_match" : {
      "query":      "Jon",
      "type":       "cross_fields",
      "fields":     [
        "first", "first.edge",
        "last",  "last.edge"
      ]
    }
  }
}

would be executed as:

    blended("jon", fields: [first, last])
| (
    blended("j",   fields: [first.edge, last.edge])
    blended("jo",  fields: [first.edge, last.edge])
    blended("jon", fields: [first.edge, last.edge])
)

In other words, first and last would be grouped together and treated as a single field, and first.edge and last.edge would be grouped together and treated as a single field.

Having multiple groups is fine, but when combined with operator or minimum_should_match, it can suffer from the same problem as most_fields or best_fields.

You can easily rewrite this query yourself as two separate cross_fields queries combined with a dis_max query, and apply the minimum_should_match parameter to just one of them:

GET /_search
{
  "query": {
    "dis_max": {
      "queries": [
        {
          "multi_match" : {
            "query":      "Will Smith",
            "type":       "cross_fields",
            "fields":     [ "first", "last" ],
            "minimum_should_match": "50%" 
          }
        },
        {
          "multi_match" : {
            "query":      "Will Smith",
            "type":       "cross_fields",
            "fields":     [ "*.edge" ]
          }
        }
      ]
    }
  }
}

Either will or smith must be present in either of the first or last fields

You can force all fields into the same group by specifying the analyzer parameter in the query.

$params = [
    'body' => [
        'query' => [
            'multi_match' => [
                'query' => 'Jon',
                'type' => 'cross_fields',
                'analyzer' => 'standard',
                'fields' => [
                    'first',
                    'last',
                    '*.edge',
                ],
            ],
        ],
    ],
];
$response = $client->search($params);

resp = client.search(
    body={
        "query": {
            "multi_match": {
                "query": "Jon",
                "type": "cross_fields",
                "analyzer": "standard",
                "fields": ["first", "last", "*.edge"],
            }
        }
    },
)
print(resp)

response = client.search(
  body: {
    query: {
      multi_match: {
        query: 'Jon',
        type: 'cross_fields',
        analyzer: 'standard',
        fields: [
          'first',
          'last',
          '*.edge'
        ]
      }
    }
  }
)
puts response

res, err := es.Search(
	es.Search.WithBody(strings.NewReader(`{
	  "query": {
	    "multi_match": {
	      "query": "Jon",
	      "type": "cross_fields",
	      "analyzer": "standard",
	      "fields": [
	        "first",
	        "last",
	        "*.edge"
	      ]
	    }
	  }
	}`)),
	es.Search.WithPretty(),
)
fmt.Println(res, err)

const response = await client.search({
  body: {
    query: {
      multi_match: {
        query: 'Jon',
        type: 'cross_fields',
        analyzer: 'standard',
        fields: [
          'first',
          'last',
          '*.edge'
        ]
      }
    }
  }
})
console.log(response)

GET /_search
{
  "query": {
   "multi_match" : {
      "query":      "Jon",
      "type":       "cross_fields",
      "analyzer":   "standard", 
      "fields":     [ "first", "last", "*.edge" ]
    }
  }
}

Use the standard analyzer for all fields.

which will be executed as:

blended("will",  fields: [first, first.edge, last.edge, last])
blended("smith", fields: [first, first.edge, last.edge, last])

`tie_breaker`

edit

By default, each per-term blended query will use the best score returned by any field in a group. Then when combining scores across groups, the query uses the best score from any group. The tie_breaker parameter can change the behavior for both of these steps:

`0.0`	Take the single best score out of (eg) `first_name:will` and `last_name:will` (default)
`1.0`	Add together the scores for (eg) `first_name:will` and `last_name:will`
`0.0 < n < 1.0`	Take the single best score plus `tie_breaker` multiplied by each of the scores from other matching fields/ groups

cross_fields and fuzziness

The fuzziness parameter cannot be used with the cross_fields type.

`bool_prefix`

edit

The bool_prefix type’s scoring behaves like most_fields, but using a match_bool_prefix query instead of a match query.

$params = [
    'body' => [
        'query' => [
            'multi_match' => [
                'query' => 'quick brown f',
                'type' => 'bool_prefix',
                'fields' => [
                    'subject',
                    'message',
                ],
            ],
        ],
    ],
];
$response = $client->search($params);

resp = client.search(
    body={
        "query": {
            "multi_match": {
                "query": "quick brown f",
                "type": "bool_prefix",
                "fields": ["subject", "message"],
            }
        }
    },
)
print(resp)

response = client.search(
  body: {
    query: {
      multi_match: {
        query: 'quick brown f',
        type: 'bool_prefix',
        fields: [
          'subject',
          'message'
        ]
      }
    }
  }
)
puts response

res, err := es.Search(
	es.Search.WithBody(strings.NewReader(`{
	  "query": {
	    "multi_match": {
	      "query": "quick brown f",
	      "type": "bool_prefix",
	      "fields": [
	        "subject",
	        "message"
	      ]
	    }
	  }
	}`)),
	es.Search.WithPretty(),
)
fmt.Println(res, err)

const response = await client.search({
  body: {
    query: {
      multi_match: {
        query: 'quick brown f',
        type: 'bool_prefix',
        fields: [
          'subject',
          'message'
        ]
      }
    }
  }
})
console.log(response)

GET /_search
{
  "query": {
    "multi_match" : {
      "query":      "quick brown f",
      "type":       "bool_prefix",
      "fields":     [ "subject", "message" ]
    }
  }
}

The analyzer, boost, operator, minimum_should_match, lenient, zero_terms_query, and auto_generate_synonyms_phrase_query parameters as explained in match query are supported. The fuzziness, prefix_length, max_expansions, fuzzy_rewrite, and fuzzy_transpositions parameters are supported for the terms that are used to construct term queries, but do not have an effect on the prefix query constructed from the final term.

The slop parameter is not supported by this query type.

« Combined fields Query string query »

Multi-match query

Multi-match query

fields and per-field boosting

Types of multi_match query:

best_fields

most_fields

phrase and phrase_prefix

cross_fields

cross_field and analysis

tie_breaker

bool_prefix

`fields` and per-field boosting

Types of `multi_match` query:

`best_fields`

`most_fields`

`phrase` and `phrase_prefix`

`cross_fields`

`cross_field` and analysis

`tie_breaker`

`bool_prefix`