1. A method of a system having a processor, comprising: in response to a query having a search term, accessing an inverted index that is defined on a set of attributes of a database structure, wherein the inverted index associates values of the set of attributes with corresponding references to rows of the database structure; determining whether any of the attributes in the set is in the search term; and in response to determining that any of the attributes in the set is in the search term, using the inverted index to produce an answer to the query.