feat: Allow jobs to be run in a different project

sqlalchemy_bigquery/base.py

@@ -27,7 +27,7 @@
 
 from google import auth
 import google.api_core.exceptions
-from google.cloud.bigquery import dbapi
+from google.cloud.bigquery import dbapi, ConnectionProperty
 from google.cloud.bigquery.table import (
     RangePartitioning,
     TableReference,
@@ -61,6 +61,7 @@
 from .parse_url import parse_url
 from . import _helpers, _struct, _types
 import sqlalchemy_bigquery_vendored.sqlalchemy.postgresql.base as vendored_postgresql
+from google.cloud.bigquery import QueryJobConfig
 
 # Illegal characters is intended to be all characters that are not explicitly
 # allowed as part of the flexible column names.
@@ -1080,6 +1081,7 @@ def __init__(
         self,
         arraysize=5000,
         credentials_path=None,
+        billing_project_id=None,
         location=None,
         credentials_info=None,
         credentials_base64=None,
@@ -1092,6 +1094,8 @@ def __init__(
         self.credentials_path = credentials_path
         self.credentials_info = credentials_info
         self.credentials_base64 = credentials_base64
+        self.project_id = None
+        self.billing_project_id = billing_project_id
         self.location = location
         self.identifier_preparer = self.preparer(self)
         self.dataset_id = None
@@ -1114,15 +1118,20 @@ def _build_formatted_table_id(table):
         """Build '<dataset_id>.<table_id>' string using given table."""
         return "{}.{}".format(table.reference.dataset_id, table.table_id)
 
-    @staticmethod
-    def _add_default_dataset_to_job_config(job_config, project_id, dataset_id):
-        # If dataset_id is set, then we know the job_config isn't None
-        if dataset_id:
-            # If project_id is missing, use default project_id for the current environment
+    def create_job_config(self, provided_config: QueryJobConfig):
+        project_id = self.project_id
+        if self.dataset_id is None and project_id == self.billing_project_id:
+            return provided_config
+        job_config = provided_config or QueryJobConfig()
+        if project_id != self.billing_project_id:
+            job_config.connection_properties = [
+                ConnectionProperty(key="dataset_project_id", value=project_id)
+            ]
+        if self.dataset_id:
             if not project_id:
                 _, project_id = auth.default()
-
-            job_config.default_dataset = "{}.{}".format(project_id, dataset_id)
+            job_config.default_dataset = "{}.{}".format(project_id, self.dataset_id)
+        return job_config
 
     def do_execute(self, cursor, statement, parameters, context=None):
         kwargs = {}
@@ -1132,13 +1141,13 @@ def do_execute(self, cursor, statement, parameters, context=None):
 
     def create_connect_args(self, url):
         (
-            project_id,
+            self.project_id,
             location,
             dataset_id,
             arraysize,
             credentials_path,
             credentials_base64,
-            default_query_job_config,
+            provided_job_config,
             list_tables_page_size,
             user_supplied_client,
         ) = parse_url(url)
@@ -1149,9 +1158,9 @@ def create_connect_args(self, url):
         self.credentials_path = credentials_path or self.credentials_path
         self.credentials_base64 = credentials_base64 or self.credentials_base64
         self.dataset_id = dataset_id
-        self._add_default_dataset_to_job_config(
-            default_query_job_config, project_id, dataset_id
-        )
+        self.billing_project_id = self.billing_project_id or self.project_id
+
+        default_query_job_config = self.create_job_config(provided_job_config)
 
         if user_supplied_client:
             # The user is expected to supply a client with
@@ -1162,10 +1171,14 @@ def create_connect_args(self, url):
                 credentials_path=self.credentials_path,
                 credentials_info=self.credentials_info,
                 credentials_base64=self.credentials_base64,
-                project_id=project_id,
+                project_id=self.billing_project_id,
                 location=self.location,
                 default_query_job_config=default_query_job_config,
             )
+            # If the user specified `bigquery://` we need to set the project_id
+            # from the client
+            self.project_id = self.project_id or client.project
+            self.billing_project_id = self.billing_project_id or client.project
             return ([], {"client": client})
 
     def _get_table_or_view_names(self, connection, item_types, schema=None):
@@ -1177,7 +1190,7 @@ def _get_table_or_view_names(self, connection, item_types, schema=None):
         )
 
         client = connection.connection._client
-        datasets = client.list_datasets()
+        datasets = client.list_datasets(self.project_id)
 
         result = []
         for dataset in datasets:
@@ -1278,7 +1291,8 @@ def _get_table(self, connection, table_name, schema=None):
 
         client = connection.connection._client
 
-        table_ref = self._table_reference(schema, table_name, client.project)
+        # table_ref = self._table_reference(schema, table_name, client.project)
+        table_ref = self._table_reference(schema, table_name, self.project_id)
         try:
             table = client.get_table(table_ref)
         except NotFound:
@@ -1332,7 +1346,7 @@ def get_schema_names(self, connection, **kw):
         if isinstance(connection, Engine):
             connection = connection.connect()
 
-        datasets = connection.connection._client.list_datasets()
+        datasets = connection.connection._client.list_datasets(self.project_id)
         return [d.dataset_id for d in datasets]
 
     def get_table_names(self, connection, schema=None, **kw):

tests/system/test_sqlalchemy_bigquery_remote.py

@@ -0,0 +1,107 @@
+# Copyright (c) 2017 The sqlalchemy-bigquery Authors
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy of
+# this software and associated documentation files (the "Software"), to deal in
+# the Software without restriction, including without limitation the rights to
+# use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+# the Software, and to permit persons to whom the Software is furnished to do so,
+# subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+# FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+# COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+# IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+# -*- coding: utf-8 -*-
+
+from sqlalchemy.engine import create_engine
+from sqlalchemy.exc import DatabaseError
+from sqlalchemy.schema import Table, MetaData
+import pytest
+import sqlalchemy
+import google.api_core.exceptions as core_exceptions
+
+
+EXPECTED_STATES = ["AL", "CA", "FL", "KY"]
+
+REMOTE_TESTS = [
+    ("bigquery-public-data", "bigquery-public-data.usa_names.usa_1910_2013"),
+    ("bigquery-public-data", "usa_names.usa_1910_2013"),
+    ("bigquery-public-data/usa_names", "bigquery-public-data.usa_names.usa_1910_2013"),
+    ("bigquery-public-data/usa_names", "usa_1910_2013"),
+    ("bigquery-public-data/usa_names", "usa_names.usa_1910_2013"),
+]
+
+
+@pytest.fixture(scope="session")
+def engine_using_remote_dataset(bigquery_client):
+    engine = create_engine(
+        "bigquery://bigquery-public-data/usa_names",
+        billing_project_id=bigquery_client.project,
+        echo=True,
+    )
+    return engine
+
+
+def test_remote_tables_list(engine_using_remote_dataset):
+    tables = sqlalchemy.inspect(engine_using_remote_dataset).get_table_names()
+    assert "usa_1910_2013" in tables
+
+
+@pytest.mark.parametrize(
+    ["urlpath", "table_name"],
+    REMOTE_TESTS,
+    ids=[f"test_engine_remote_sql_{x}" for x in range(len(REMOTE_TESTS))],
+)
+def test_engine_remote_sql(bigquery_client, urlpath, table_name):
+    engine = create_engine(
+        f"bigquery://{urlpath}", billing_project_id=bigquery_client.project, echo=True
+    )
+    with engine.connect() as conn:
+        rows = conn.execute(
+            sqlalchemy.text(f"SELECT DISTINCT(state) FROM `{table_name}`")
+        ).fetchall()
+        states = set(map(lambda row: row[0], rows))
+        assert set(EXPECTED_STATES).issubset(states)
+
+
+@pytest.mark.parametrize(
+    ["urlpath", "table_name"],
+    REMOTE_TESTS,
+    ids=[f"test_engine_remote_table_{x}" for x in range(len(REMOTE_TESTS))],
+)
+def test_engine_remote_table(bigquery_client, urlpath, table_name):
+    engine = create_engine(
+        f"bigquery://{urlpath}", billing_project_id=bigquery_client.project, echo=True
+    )
+    with engine.connect() as conn:
+        table = Table(table_name, MetaData(), autoload_with=engine)
+        prepared = sqlalchemy.select(
+            sqlalchemy.distinct(table.c.state)
+        ).set_label_style(sqlalchemy.LABEL_STYLE_TABLENAME_PLUS_COL)
+        rows = conn.execute(prepared).fetchall()
+        states = set(map(lambda row: row[0], rows))
+        assert set(EXPECTED_STATES).issubset(states)
+
+
+@pytest.mark.parametrize(
+    ["urlpath", "table_name"],
+    REMOTE_TESTS,
+    ids=[f"test_engine_remote_table_fail_{x}" for x in range(len(REMOTE_TESTS))],
+)
+def test_engine_remote_table_fail(urlpath, table_name):
+    engine = create_engine(f"bigquery://{urlpath}", echo=True)
+    with pytest.raises(
+        (DatabaseError, core_exceptions.Forbidden), match="Access Denied"
+    ):
+        with engine.connect() as conn:
+            table = Table(table_name, MetaData(), autoload_with=engine)
+            prepared = sqlalchemy.select(
+                sqlalchemy.distinct(table.c.state)
+            ).set_label_style(sqlalchemy.LABEL_STYLE_TABLENAME_PLUS_COL)
+            conn.execute(prepared).fetchall()

tests/unit/fauxdbi.py

@@ -327,10 +327,12 @@ def _fix_pickled(self, row):
                 pickle.loads(v.encode("latin1"))
                 # \x80\x04 is latin-1 encoded prefix for Pickle protocol 4.
                 if isinstance(v, str) and v[:2] == "\x80\x04" and v[-1] == "."
-                else pickle.loads(base64.b16decode(v))
-                # 8004 is base64 encoded prefix for Pickle protocol 4.
-                if isinstance(v, str) and v[:4] == "8004" and v[-2:] == "2E"
-                else v
+                else (
+                    pickle.loads(base64.b16decode(v))
+                    # 8004 is base64 encoded prefix for Pickle protocol 4.
+                    if isinstance(v, str) and v[:4] == "8004" and v[-2:] == "2E"
+                    else v
+                )
             )
             for d, v in zip(self.description, row)
         ]
@@ -355,7 +357,10 @@ def __getattr__(self, name):
 class FauxClient:
     def __init__(self, project_id=None, default_query_job_config=None, *args, **kw):
         if project_id is None:
-            if default_query_job_config is not None:
+            if (
+                default_query_job_config is not None
+                and default_query_job_config.default_dataset
+            ):
                 project_id = default_query_job_config.default_dataset.project
             else:
                 project_id = "authproj"  # we would still have gotten it from auth.
@@ -469,10 +474,10 @@ def get_table(self, table_ref):
             else:
                 raise google.api_core.exceptions.NotFound(table_ref)
 
-    def list_datasets(self):
+    def list_datasets(self, project="myproject"):
         return [
-            google.cloud.bigquery.Dataset("myproject.mydataset"),
-            google.cloud.bigquery.Dataset("myproject.yourdataset"),
+            google.cloud.bigquery.Dataset(f"{project}.mydataset"),
+            google.cloud.bigquery.Dataset(f"{project}.yourdataset"),
         ]
 
     def list_tables(self, dataset, page_size):

tests/unit/test_engine.py

@@ -27,6 +27,12 @@ def test_engine_dataset_but_no_project(faux_conn):
     assert conn.connection._client.project == "authproj"
 
 
+def test_engine_dataset_with_billing_project(faux_conn):
+    engine = sqlalchemy.create_engine("bigquery://foo", billing_project_id="bar")
+    conn = engine.connect()
+    assert conn.connection._client.project == "bar"
+
+
 def test_engine_no_dataset_no_project(faux_conn):
     engine = sqlalchemy.create_engine("bigquery://")
     conn = engine.connect()