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


Environment Variables

Environment VariableDescriptionPossible ValuesRequiredSupports multiple data sources?
CUBEJS_DB_HOSTThe host URL for a databaseA valid database host URL
CUBEJS_DB_PORTThe port for the database connectionA valid port number
CUBEJS_DB_NAMEThe name of the database to connect toA valid database name
CUBEJS_DB_USERThe username used to connect to the databaseA valid database username
CUBEJS_DB_PASSThe password used to connect to the databaseA valid database password
CUBEJS_DB_SSLIf true, enables SSL encryption for database connections from Cubetrue, false
CUBEJS_CONCURRENCYThe number of concurrent connections each queue has to the database. Default is 2A valid number
CUBEJS_DB_MAX_POOLThe maximum number of concurrent database connections to pool. Default is 8A valid number

Pre-Aggregation Feature Support


Measures of type count_distinct_approx can not be used in pre-aggregations when using MySQL as a source database.

Pre-Aggregation Build Strategies

To learn more about pre-aggregation build strategies, head here.

FeatureWorks with read-only mode?Is default?
Export Bucket--

By default, MySQL uses batching to build pre-aggregations.


No extra configuration is required to configure batching for MySQL.

Export Bucket

MySQL does not support export buckets.


To enable SSL-encrypted connections between Cube and MySQL, 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.

Additional Configuration


To connect to a local MySQL database using a Unix socket, use CUBEJS_DB_SOCKET_PATH. When doing so, CUBEJS_DB_HOST will be ignored.

You can connect to an SSL-enabled MySQL database by setting CUBEJS_DB_SSL to true. All other SSL-related environment variables can be left unset. See the SSL section above for more details.