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feat(bigquery): add anonymous connection method using AnonymousCredentials #1304

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feat(bigquery): add anonymous connection method using AnonymousCredentials #1304

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3cf0957
feat(bigquery): add anonymous connection method using AnonymousCreden…
luispedroemg Aug 29, 2025
941e6d2
Merge branch 'main' into feat/bq-anonymous-credentials
luispedroemg Sep 2, 2025
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5 changes: 5 additions & 0 deletions dbt-bigquery/src/dbt/adapters/bigquery/credentials.py
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,7 @@
from google.oauth2.credentials import Credentials as GoogleCredentials
from google.oauth2.service_account import Credentials as ServiceAccountCredentials
from google.auth.identity_pool import Credentials as IdentityPoolCredentials
from google.auth.credentials import AnonymousCredentials
from mashumaro import pass_through

from dbt_common.clients.system import run_cmd
Expand Down Expand Up @@ -42,6 +43,7 @@ class BigQueryConnectionMethod(StrEnum):
SERVICE_ACCOUNT_JSON = "service-account-json"
# WIF in this context refers to Workload Identity Federation https://cloud.google.com/iam/docs/workload-identity-federation
EXTERNAL_OAUTH_WIF = "external-oauth-wif"
ANONYMOUS = "anonymous"


@dataclass
Expand Down Expand Up @@ -248,6 +250,9 @@ def _create_google_credentials(credentials: BigQueryCredentials) -> GoogleCreden
elif credentials.method == BigQueryConnectionMethod.EXTERNAL_OAUTH_WIF:
creds = _create_identity_pool_credentials(credentials=credentials)

elif credentials.method == BigQueryConnectionMethod.ANONYMOUS:
creds = AnonymousCredentials()

else:
raise FailedToConnectError(f"Invalid `method` in profile: '{credentials.method}'")

Expand Down
29 changes: 29 additions & 0 deletions dbt-bigquery/tests/unit/test_bigquery_adapter.py
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Expand Up @@ -166,6 +166,21 @@ def setUp(self):
"compute_region": "europe-west1",
"submission_method": "serverless",
},
"anonymous_ok": {
"type": "bigquery",
"method": "anonymous",
"project": "dbt-unit-000000",
"schema": "dummy_schema",
"threads": 1,
"api_endpoint": "http://localhost:9050",
},
"anonymous_missing_api_endpoint": {
"type": "bigquery",
"method": "anonymous",
"project": "dbt-unit-000000",
"schema": "dummy_schema",
"threads": 1,
},
},
"target": "oauth",
}
Expand Down Expand Up @@ -407,6 +422,20 @@ def test_acquire_connection_maximum_bytes_billed(self, mock_open_connection):
connection.handle
mock_open_connection.assert_called_once()

@patch("dbt.adapters.bigquery.BigQueryConnectionManager.open", return_value=_bq_conn())
def test_acquire_connection_anonymous_validations(self, mock_open_connection):
adapter = self.get_adapter("anonymous_ok")
try:
connection = adapter.acquire_connection("dummy")
self.assertEqual(connection.type, "bigquery")

except dbt_common.exceptions.base.DbtValidationError as e:
self.fail("got DbtValidationError: {}".format(str(e)))

mock_open_connection.assert_not_called()
connection.handle
mock_open_connection.assert_called_once()

def test_cancel_open_connections_empty(self):
adapter = self.get_adapter("oauth")
self.assertEqual(len(list(adapter.cancel_open_connections())), 0)
Expand Down
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