Presto

Configuration

Prism relies on the Presto DBAPI client to connect your project to a Presto cluster. The DBAPI offers several different authentication mechanisms for creating this connection. As of now, Prism only supports BasicAuthentication.

The configurations required for BasicAuthentication are:

• autocommit: toggle whether the connection commits changes to the database after executing. The default is True.

• host: the hostname of Amazon Redshift cluster.

• port: the port number of the Amazon Redshift cluster.

• database: the name of the database to which you want to connect.

• user: the user name to use for authentication.

• password: the password to use for authentication

profile.yml

<profile name here>:
  adapters:
    <presto adapter name here>: # change this!
      type: presto
      host:
      http_scheme: https
      port:
      user:
      password:
      catalog:
      schema:

Under the hood, Prism takes care of parsing the configuration variables and establishing a connection to your Presto cluster.

hooks.sql()

You can run queries against the Redshift cluster using the hooks.sql function:

def run(self, tasks, hooks):
    data = hooks.sql(
        adapter_name="<presto adapter name>",
        query="SELECT * FROM table"
    )

Note that when return_type = None, the result will be a list tuples containing the query data.