This project aims to expose via a Graphql endpoint the data managed by either Hive or Impala. It uses JDBC introspection capabilities for dynamically generating a Graphql schema for all the tables associated with a given database. The generated schema tries to follow the specification defined by the Hasura platform. You can find the SQL to Graphql mapping here.
Once cloned the project, go to the project root and in the configuration file etc/application.conf set the proper JDBC URL. After, just run:
sbt run -Dconfig.file=etc/application.conf
and open the browser here: http://localhost:8088/graphql/ui. You should then log in using your Hive/Impala credentials and choose the database you'd like to expose.