perf(sqlalchemy-bigquery): exclude unsupported OLTP compliance test suites

Author: ohmayr

packages/sqlalchemy-bigquery/tests/sqlalchemy_dialect_compliance/test_dialect_compliance.py

@@ -643,3 +643,16 @@ def test_no_results_for_non_returning_insert(cls):
 del (
     WindowFunctionTest.test_window_rows_between
 )  # test expects BQ to return sorted results
+
+# Deleting compliance suites for features BigQuery (OLAP) explicitly does not support:
+try:
+    from sqlalchemy.testing.suite import IsolationLevelTest
+    del IsolationLevelTest  # BigQuery does not support transaction isolation levels
+except ImportError:
+    pass
+
+try:
+    from sqlalchemy.testing.suite import TransactionTest
+    del TransactionTest  # BigQuery does not support savepoints/transaction isolation
+except ImportError:
+    pass