Presto

Prerequisites

The hostname for the Presto (opens in a new tab) database server
The username/password for the Presto (opens in a new tab) database server
The name of the database to use within the Presto (opens in a new tab) database server

Setup

Manual

Add the following to a .env file in your Cube project:

CUBEJS_DB_TYPE=prestodb
CUBEJS_DB_HOST=my.presto.host
CUBEJS_DB_USER=presto_user
CUBEJS_DB_PASS=**********
CUBEJS_DB_PRESTO_CATALOG=my_presto_catalog
CUBEJS_DB_SCHEMA=my_presto_schema

Environment Variables

Environment Variable	Description	Possible Values	Required
`CUBEJS_DB_HOST`	The host URL for a database	A valid database host URL	✅
`CUBEJS_DB_PORT`	The port for the database connection	A valid port number	❌
`CUBEJS_DB_USER`	The username used to connect to the database	A valid database username	✅
`CUBEJS_DB_PASS`	The password used to connect to the database	A valid database password	✅
`CUBEJS_DB_PRESTO_CATALOG`	The catalog within Presto to connect to	A valid catalog name within a Presto database	✅
`CUBEJS_DB_SCHEMA`	The schema within the database to connect to	A valid schema name within a Presto database	✅
`CUBEJS_DB_SSL`	If `true`, enables SSL encryption for database connections from Cube	`true`, `false`	❌
`CUBEJS_CONCURRENCY`	The number of concurrent connections each queue has to the database. Default is `2`	A valid number	❌
`CUBEJS_DB_MAX_POOL`	The maximum number of concurrent database connections to pool. Default is `8`	A valid number	❌

Pre-Aggregation Feature Support

count_distinct_approx

Measures of type count_distinct_approx can be used in pre-aggregations when using Presto as a source database. To learn more about Presto support for approximate aggregate functions, click here (opens in a new tab).

SSL

To enable SSL-encrypted connections between Cube and Presto, set the CUBEJS_DB_SSL environment variable to true. For more information on how to configure custom certificates, please check out Enable SSL Connections to the Database.

Postgres QuestDB