When setting up a Snowplow Signals Snowflake External Batch connection in the Snowplow Console UI, you might notice that the dropdown list of available tables doesn't include all the tables that exist in your Snowflake warehouse. This discrepancy typically occurs due to one critical factor: granular grant permissions.
Why Tables Might Be Missing from the Dropdown
Snowflake uses a permission-based model where table visibility depends on the specific grants assigned to the user or role being used for the connection. Even though tables exist in your warehouse, they won't appear in the Snowplow Console UI dropdown unless the connected user has the appropriate permissions to access them.
Understanding Granular Grant Permissions
Your Snowflake warehouse likely uses granular grants that control access at multiple levels:
- Schema-level permissions
- Table-level permissions
- Role-based access control
- Dynamic object privileges
If the Snowflake user or role configured for your Snowplow connection doesn't have SELECT or USAGE grants on specific schemas or tables, those tables simply won't appear as available options, even though they technically exist in your warehouse.
Dynamic Table Names and Configuration Changes
Additionally, table names in Snowflake environments are often dynamic, meaning they may be created, modified, or renamed as part of your data pipeline. When new tables are added to your warehouse, they may not immediately reflect in the Snowplow Console dropdown if the connected role doesn't have permissions on those new tables.
How to Resolve This
To ensure all expected tables appear in the Snowplow Console dropdown:
- Verify that the Snowflake user or role used for the Snowplow connection has SELECT permissions on the target tables
- Confirm the user has USAGE permissions on the relevant schemas
- Check that the role has appropriate warehouse access
- If tables were recently created, ensure grants have been applied and re-test the connection
If you continue to see missing tables after verifying permissions, contact your Snowflake administrator to audit the grants assigned to the connection role.
Recommended Approach: Using FUTURE GRANTS
FUTURE GRANTS. FUTURE GRANTS allows you to grant permissions on objects that don't yet exist in your schema.By running:
GRANT SELECT, USAGE ON FUTURE TABLES IN SCHEMA <schema_name> TO ROLE <role_name>
Any new tables created in that schema will automatically inherit the specified permissions. This eliminates the need to manually grant permissions after creating each table and ensures consistent access across your data warehouse.
This approach is particularly valuable if you're regularly adding new tables to your Snowflake environment, as it maintains seamless integration between your warehouse and Snowplow's Signals platform.