PNC
Databricks Partner
Schema's storage location is something like this:

 

abfss://my-container@my-storage-account.dfs.core.windows.net/catalog/schema/__unitystorage/schemas/xxx-xxx-xxx-xxx-xxx

 

I have external location called "container_catalog" for URL abfss://my-container@my-storage-account.dfs.core.windows.net/catalog

 

Storage Credential for this location is called "my_credential" and it's connector id is /subscriptions/xxx-xxx-xxx-xxxx-xxx/resourceGroups/my-resource-group/providers/Microsoft.Databricks/accessConnectors/my-access-connector

 

Now when I go Azure portal and navigate to storage account "my-storage-account" and open up IAM, I can see that my-access-connector has Storage Blob Data Contributor role assigned to it (scoped to storage account).

 

When I run 
SELECT COUNT(*) FROM catalog.schema.table;
I get the row count as expected.