feat: Add role parameter to driver options (#448) Thanks to @smbkr!

Fixes #447

Author: smbkr

docs/Cube.js-Backend/Connecting-to-the-Database.md

@@ -47,7 +47,7 @@ The table below shows which environment variables are used for different databas
 | AWS Athena | `CUBEJS_AWS_KEY`, `CUBEJS_AWS_SECRET`, `CUBEJS_AWS_REGION`, `CUBEJS_AWS_S3_OUTPUT_LOCATION` |
 | Google Bigquery | `CUBEJS_DB_BQ_PROJECT_ID`, `CUBEJS_DB_BQ_KEY_FILE or CUBEJS_DB_BQ_CREDENTIALS` |
 | MongoDB | `CUBEJS_DB_HOST`, `CUBEJS_DB_NAME`, `CUBEJS_DB_PORT`, `CUBEJS_DB_USER`, `CUBEJS_DB_PASS`, `CUBEJS_DB_SSL`, `CUBEJS_DB_SSL_CA`, `CUBEJS_DB_SSL_CERT`, `CUBEJS_DB_SSL_CIPHERS`, `CUBEJS_DB_SSL_PASSPHRASE` |
-| Snowflake | `CUBEJS_DB_SNOWFLAKE_ACCOUNT`, `CUBEJS_DB_SNOWFLAKE_REGION`, `CUBEJS_DB_SNOWFLAKE_WAREHOUSE`, `CUBEJS_DB_NAME`, `CUBEJS_DB_USER`, `CUBEJS_DB_PASS`|
+| Snowflake | `CUBEJS_DB_SNOWFLAKE_ACCOUNT`, `CUBEJS_DB_SNOWFLAKE_REGION`, `CUBEJS_DB_SNOWFLAKE_WAREHOUSE`, `CUBEJS_DB_SNOWFLAKE_ROLE`, `CUBEJS_DB_NAME`, `CUBEJS_DB_USER`, `CUBEJS_DB_PASS`|
 | Presto | `CUBEJS_DB_HOST`, `CUBEJS_DB_PORT`, `CUBEJS_DB_CATALOG`, `CUBEJS_DB_SCHEMA`, `CUBEJS_DB_USER`, `CUBEJS_DB_PASS` |
 
 ## Notes

packages/cubejs-snowflake-driver/driver/SnowflakeDriver.js

@@ -8,6 +8,7 @@ class SnowflakeDriver extends BaseDriver {
       account: process.env.CUBEJS_DB_SNOWFLAKE_ACCOUNT,
       region: process.env.CUBEJS_DB_SNOWFLAKE_REGION,
       warehouse: process.env.CUBEJS_DB_SNOWFLAKE_WAREHOUSE,
+      role: process.env.CUBEJS_DB_SNOWFLAKE_ROLE,
       database: process.env.CUBEJS_DB_NAME,
       username: process.env.CUBEJS_DB_USER,
       password: process.env.CUBEJS_DB_PASS,
@@ -26,7 +27,8 @@ class SnowflakeDriver extends BaseDriver {
       'CUBEJS_DB_PASS',
       'CUBEJS_DB_SNOWFLAKE_ACCOUNT',
       'CUBEJS_DB_SNOWFLAKE_REGION',
-      'CUBEJS_DB_SNOWFLAKE_WAREHOUSE'
+      'CUBEJS_DB_SNOWFLAKE_WAREHOUSE',
+      'CUBEJS_DB_SNOWFLAKE_ROLE'
     ];
   }