Heroku Postgres is the SQL database service run by Heroku that is provisioned and managed as an add-on.
Heroku Postgres is the SQL database service run by Heroku that is provisioned and managed as an add-on. Heroku Postgres is accessible from any language with a PostgreSQL driver including all languages and frameworks supported by Heroku: Java, Ruby, Python, Scala, Play, Node.js and Clojure.
In addition to a variety of management commands available via the Heroku CLI, Heroku Postgres features a web dashboard, the ability to create dataclips and several additional services on top of a fully managed database service.
Useful Links
Heroku Postgres introduction
Heroku Postgres Technical Characterization
Efficient Indexing with Heroku Postgres
Choosing the Right Heroku Postgres Plan