feat(ibis): Athena default credential chain authentication support

ibis-server/app/model/__init__.py

@@ -118,19 +118,55 @@ class AthenaConnectionInfo(BaseConnectionInfo):
         description="S3 staging directory for Athena queries",
         examples=["s3://my-bucket/athena-staging/"],
     )
-    aws_access_key_id: SecretStr = Field(
-        description="AWS access key ID", examples=["AKIA..."]
+
+    # ── Standard AWS credential chain (optional) ─────────────
+    aws_access_key_id: SecretStr | None = Field(
+        description="AWS access key ID. Optional if using IAM role, web identity token, or default credential chain.",
+        examples=["AKIA..."],
+        default=None,
+    )
+    aws_secret_access_key: SecretStr | None = Field(
+        description="AWS secret access key. Optional if using IAM role, web identity token, or default credential chain.",
+        examples=["my-secret-key"],
+        default=None,
+    )
+    aws_session_token: SecretStr | None = Field(
+        description="AWS session token (used for temporary credentials)",
+        examples=["IQoJb3JpZ2luX2VjEJz//////////wEaCXVzLWVhc3QtMSJHMEUCIQD..."],
+        default=None,
+    )
+
+    # ── Web identity federation (OIDC/JWT-based) ─────────────
+    web_identity_token: SecretStr | None = Field(
+        description=(
+            "OIDC web identity token (JWT) used for AssumeRoleWithWebIdentity authentication. "
+            "If provided, PyAthena will call STS to exchange it for temporary credentials."
+        ),
+        examples=["eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9..."],
+        default=None,
     )
-    aws_secret_access_key: SecretStr = Field(
-        description="AWS secret access key", examples=["my-secret-key"]
+    role_arn: SecretStr | None = Field(
+        description="The ARN of the role to assume with the web identity token.",
+        examples=["arn:aws:iam::123456789012:role/YourAthenaRole"],
+        default=None,
     )
+    role_session_name: SecretStr | None = Field(
+        description="The session name when assuming a role (optional).",
+        examples=["PyAthena-session"],
+        default=None,
+    )
+
+    # ── Regional and database settings ───────────────────────
     region_name: SecretStr = Field(
-        description="AWS region for Athena", examples=["us-west-2", "us-east-1"]
+        description="AWS region for Athena. Optional; will use default region if not provided.",
+        examples=["us-west-2", "us-east-1"],
+        default=None,
     )
-    schema_name: SecretStr = Field(
+    schema_name: SecretStr | None = Field(
         alias="schema_name",
-        description="The database name in Athena",
+        description="The database name in Athena. Defaults to 'default'.",
         examples=["default"],
+        default=SecretStr("default"),
     )
 
 

ibis-server/app/model/data_source.py

@@ -8,6 +8,7 @@
 from typing import Any
 from urllib.parse import unquote_plus
 
+import boto3
 import ibis
 from google.cloud import bigquery
 from google.oauth2 import service_account
@@ -254,13 +255,55 @@ def get_connection(self, info: ConnectionInfo) -> BaseBackend:
 
     @staticmethod
     def get_athena_connection(info: AthenaConnectionInfo) -> BaseBackend:
-        return ibis.athena.connect(
-            s3_staging_dir=info.s3_staging_dir.get_secret_value(),
-            aws_access_key_id=info.aws_access_key_id.get_secret_value(),
-            aws_secret_access_key=info.aws_secret_access_key.get_secret_value(),
-            region_name=info.region_name.get_secret_value(),
-            schema_name=info.schema_name.get_secret_value(),
-        )
+        kwargs: dict[str, Any] = {
+            "s3_staging_dir": info.s3_staging_dir.get_secret_value(),
+            "schema_name": info.schema_name.get_secret_value(),
+        }
+
+        # ── Region ────────────────────────────────────────────────
+        if info.region_name:
+            kwargs["region_name"] = info.region_name.get_secret_value()
+
+        # ── Web Identity Token flow (Google OIDC → AWS STS) ───
+        if info.web_identity_token and info.role_arn:
+            oidc_token = info.web_identity_token.get_secret_value()
+            role_arn = info.role_arn.get_secret_value()
+            session_name = (
+                info.role_session_name.get_secret_value()
+                if info.role_session_name
+                else "wren-oidc-session"
+            )
+            region = info.region_name.get_secret_value() if info.region_name else None
+            sts = boto3.client("sts", region_name=region)
+
+            resp = sts.assume_role_with_web_identity(
+                RoleArn=role_arn,
+                RoleSessionName=session_name,
+                WebIdentityToken=oidc_token,
+            )
+
+            creds = resp["Credentials"]
+            kwargs["aws_access_key_id"] = creds["AccessKeyId"]
+            kwargs["aws_secret_access_key"] = creds["SecretAccessKey"]
+            kwargs["aws_session_token"] = creds["SessionToken"]
+
+        # ── Standard Access/Secret Keys ───────────────────────
+        elif info.aws_access_key_id and info.aws_secret_access_key:
+            kwargs["aws_access_key_id"] = info.aws_access_key_id.get_secret_value()
+            kwargs["aws_secret_access_key"] = (
+                info.aws_secret_access_key.get_secret_value()
+            )
+            if info.aws_session_token:
+                kwargs["aws_session_token"] = info.aws_session_token.get_secret_value()
+
+        # ── 3️⃣ Default AWS credential chain ───────────────────────
+        # Nothing needed — PyAthena automatically falls back to:
+        #   - Environment variables
+        #   - ~/.aws/credentials
+        #   - IAM Role (EC2, ECS, Lambda)
+
+        # Now connect via Ibis wrapper
+        return ibis.athena.connect(**kwargs)
 
     @staticmethod
     def get_bigquery_connection(info: BigQueryConnectionInfo) -> BaseBackend:

ibis-server/tests/routers/v2/connector/test_athena.py

@@ -59,7 +59,7 @@
                 },
                 {
                     "name": "timestamptz",
-                    "expression": "TIMESTAMP '2024-01-01 23:59:59 UTC'",
+                    "expression": "CAST(TIMESTAMP '2024-01-01 23:59:59 UTC' AS timestamp)",
                     "type": "timestamp",
                 },
                 {
@@ -113,7 +113,7 @@ async def test_query(client, manifest_str):
         "orderkey": "int64",
         "custkey": "int64",
         "orderstatus": "string",
-        "totalprice": "decimal128(15, 2)",
+        "totalprice": "decimal128(38, 9)",
         "orderdate": "date32[day]",
         "order_cust_key": "string",
         "timestamp": "timestamp[us]",
@@ -153,7 +153,7 @@ async def test_query_glue_database(client, manifest_str):
         "orderkey": "int64",
         "custkey": "int64",
         "orderstatus": "string",
-        "totalprice": "decimal128(15, 2)",
+        "totalprice": "decimal128(38, 9)",
         "orderdate": "date32[day]",
         "order_cust_key": "string",
         "timestamp": "timestamp[us]",

ibis-server/tests/routers/v3/connector/athena/conftest.py

@@ -31,6 +31,39 @@ def connection_info():
     }
 
 
+@pytest.fixture(scope="session")
+def connection_info_default_credential_chain():
+    # Use default authentication (e.g., from environment variables, shared config file, or EC2 instance profile)
+    access_key = os.getenv("AWS_ACCESS_KEY_ID")
+    secret_key = os.getenv("AWS_SECRET_ACCESS_KEY")
+    if not access_key or not secret_key:
+        pytest.skip(
+            "Skipping default credential chain test: AWS credentials not set in environment"
+        )
+    return {
+        "s3_staging_dir": os.getenv("TEST_ATHENA_S3_STAGING_DIR"),
+        "region_name": os.getenv("TEST_ATHENA_REGION_NAME", "ap-northeast-1"),
+        "schema_name": "test",
+    }
+
+
+@pytest.fixture(scope="session")
+def connection_info_oidc():
+    web_identity_token = os.getenv("TEST_ATHENA_WEB_IDENTITY_TOKEN")
+    role_arn = os.getenv("TEST_ATHENA_ROLE_ARN")
+
+    if not web_identity_token or not role_arn:
+        pytest.skip("Skipping OIDC test: web identity token or role ARN not set")
+
+    return {
+        "s3_staging_dir": os.getenv("TEST_ATHENA_OIDC_S3_STAGING_DIR"),
+        "region_name": os.getenv("TEST_ATHENA_OIDC_REGION_NAME", "us-west-1"),
+        "schema_name": "test",
+        "role_arn": role_arn,
+        "web_identity_token": web_identity_token,
+    }
+
+
 @pytest.fixture(autouse=True)
 def set_remote_function_list_path():
     config = get_config()

ibis-server/tests/routers/v3/connector/athena/test_query.py

@@ -90,7 +90,7 @@ async def test_query(client, manifest_str, connection_info):
         "orderkey": "int64",
         "custkey": "int64",
         "orderstatus": "string",
-        "totalprice": "decimal128(15, 2)",
+        "totalprice": "decimal128(38, 9)",
         "orderdate": "date32[day]",
         "order_cust_key": "string",
         "timestamp": "timestamp[us]",
@@ -211,3 +211,52 @@ async def test_query_with_dry_run_and_invalid_sql(
     )
     assert response.status_code == 422
     assert response.text is not None
+
+
+@pytest.mark.parametrize(
+    "conn_fixture",
+    [
+        "connection_info",
+        "connection_info_default_credential_chain",
+        "connection_info_oidc",
+    ],
+)
+async def test_query_athena_modes(client, manifest_str, request, conn_fixture):
+    connection_info = request.getfixturevalue(conn_fixture)
+
+    response = await client.post(
+        url="/v3/connector/athena/query",
+        json={
+            "connectionInfo": connection_info,
+            "manifestStr": manifest_str,
+            "sql": "SELECT * FROM wren.public.orders LIMIT 1",
+        },
+    )
+    assert response.status_code == 200
+    result = response.json()
+    assert len(result["columns"]) == len(manifest["models"][0]["columns"])
+    assert len(result["data"]) == 1
+
+    assert result["data"][0] == [
+        1,
+        36901,
+        "O",
+        "173665.47",
+        "1996-01-02",
+        "1_36901",
+        "2024-01-01 23:59:59.000000",
+        "2024-01-01 23:59:59.000000",
+        None,
+    ]
+
+    assert result["dtypes"] == {
+        "orderkey": "int64",
+        "custkey": "int64",
+        "orderstatus": "string",
+        "totalprice": "decimal128(38, 9)",
+        "orderdate": "date32[day]",
+        "order_cust_key": "string",
+        "timestamp": "timestamp[us]",
+        "timestamptz": "timestamp[us]",
+        "test_null_time": "timestamp[us]",
+    }