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Span multi-term query

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Span multi-term query

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The span_multi query allows you to wrap a multi term query (one of wildcard, fuzzy, prefix, range or regexp query) as a span query, so it can be nested. Example:

response = client.search(
  body: {
    query: {
      span_multi: {
        match: {
          prefix: {
            'user.id' => {
              value: 'ki'
            }
          }
        }
      }
    }
  }
)
puts response

GET /_search
{
  "query": {
    "span_multi": {
      "match": {
        "prefix": { "user.id": { "value": "ki" } }
      }
    }
  }
}

A boost can also be associated with the query:

response = client.search(
  body: {
    query: {
      span_multi: {
        match: {
          prefix: {
            'user.id' => {
              value: 'ki',
              boost: 1.08
            }
          }
        }
      }
    }
  }
)
puts response

GET /_search
{
  "query": {
    "span_multi": {
      "match": {
        "prefix": { "user.id": { "value": "ki", "boost": 1.08 } }
      }
    }
  }
}

span_multi queries will hit too many clauses failure if the number of terms that match the query exceeds the indices.query.bool.max_clause_count search setting. To avoid an unbounded expansion you can set the rewrite method of the multi term query to top_terms_* rewrite. Or, if you use span_multi on prefix query only, you can activate the index_prefixes field option of the text field instead. This will rewrite any prefix query on the field to a single term query that matches the indexed prefix.

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