code: def text_search(conn, search, *, language='english', case_sensitive=False,
                  diacritic_sensitive=False, text_score=False, limit=0, table=None):
      
  
      raise OperationError('This query is only supported when running '
                           'BigchainDB with MongoDB as the backend.')
docs: Return all the assets that match the text search.
  
      The results are sorted by text score.
      For more information about the behavior of text search on MongoDB see
      https://docs.mongodb.com/manual/reference/operator/query/text/#behavior
  
      Args:
          search (str): Text search string to query the text index
          language (str, optional): The language for the search and the rules for
              stemmer and tokenizer. If the language is ``None`` text search uses
              simple tokenization and no stemming.
          case_sensitive (bool, optional): Enable or disable case sensitive
              search.
          diacritic_sensitive (bool, optional): Enable or disable case sensitive
              diacritic search.
          text_score (bool, optional): If ``True`` returns the text score with
              each document.
          limit (int, optional): Limit the number of returned documents.
  
      Returns:
          :obj:`list` of :obj:`dict`: a list of assets
  
      Raises:
          OperationError: If the backend does not support text search