class OpenSearch::DSL::Search::Filters::Exists

A filter which returns documents which have a non-‘null` value in the specified field (ie. the reverse of the `missing` filter)

@example

search do
  query do
    filtered do
      filter do
        exists field: 'occupation'
      end
    end
  end
end

@see opensearch.org/guide/en/opensearch/reference/current/query-dsl-exists-filter.html