Given this one would assume there is a way to define your schema to include both the appropriate column type (e.g. ts_vector Postgresql, FULLTEXT MySQL, etc.) and indexes for those columns. However there doesn't seem to be any documentation of this or indication that it is on their radar.
This is a feature request for Full-Text Search functionality to perform a fulltext search on specific fields. Ideally with support for using GIN/GIST indexes to speed up full text search.