feat: testing for fgac-pg (#902)

* fgac-pg testing

* changes

tests/system/test_database_api.py

@@ -24,6 +24,7 @@
 from google.type import expr_pb2
 from . import _helpers
 from . import _sample_data
+from google.cloud.spanner_admin_database_v1 import DatabaseDialect
 
 
 DBAPI_OPERATION_TIMEOUT = 240  # seconds
@@ -226,7 +227,6 @@ def test_iam_policy(
     not_emulator,
     shared_instance,
     databases_to_delete,
-    not_postgres,
 ):
     pool = spanner_v1.BurstyPool(labels={"testcase": "iam_policy"})
     temp_db_id = _helpers.unique_id("iam_db", separator="_")
@@ -407,27 +407,31 @@ def test_update_ddl_w_default_leader_success(
 
 
 def test_create_role_grant_access_success(
-    not_emulator,
-    shared_instance,
-    databases_to_delete,
-    not_postgres,
+    not_emulator, shared_instance, databases_to_delete, database_dialect
 ):
     creator_role_parent = _helpers.unique_id("role_parent", separator="_")
     creator_role_orphan = _helpers.unique_id("role_orphan", separator="_")
 
     temp_db_id = _helpers.unique_id("dfl_ldrr_upd_ddl", separator="_")
-    temp_db = shared_instance.database(temp_db_id)
+    temp_db = shared_instance.database(temp_db_id, database_dialect=database_dialect)
 
     create_op = temp_db.create()
     databases_to_delete.append(temp_db)
     create_op.result(DBAPI_OPERATION_TIMEOUT)  # raises on failure / timeout.
-
     # Create role and grant select permission on table contacts for parent role.
-    ddl_statements = _helpers.DDL_STATEMENTS + [
-        f"CREATE ROLE {creator_role_parent}",
-        f"CREATE ROLE {creator_role_orphan}",
-        f"GRANT SELECT ON TABLE contacts TO ROLE {creator_role_parent}",
-    ]
+    if database_dialect == DatabaseDialect.GOOGLE_STANDARD_SQL:
+        ddl_statements = _helpers.DDL_STATEMENTS + [
+            f"CREATE ROLE {creator_role_parent}",
+            f"CREATE ROLE {creator_role_orphan}",
+            f"GRANT SELECT ON TABLE contacts TO ROLE {creator_role_parent}",
+        ]
+    elif database_dialect == DatabaseDialect.POSTGRESQL:
+        ddl_statements = _helpers.DDL_STATEMENTS + [
+            f"CREATE ROLE {creator_role_parent}",
+            f"CREATE ROLE {creator_role_orphan}",
+            f"GRANT SELECT ON TABLE contacts TO {creator_role_parent}",
+        ]
+
     operation = temp_db.update_ddl(ddl_statements)
     operation.result(DBAPI_OPERATION_TIMEOUT)  # raises on failure / timeout.
 
@@ -445,27 +449,31 @@ def test_create_role_grant_access_success(
     with temp_db.snapshot() as snapshot:
         snapshot.execute_sql("SELECT * FROM contacts")
 
-    ddl_remove_roles = [
-        f"REVOKE SELECT ON TABLE contacts FROM ROLE {creator_role_parent}",
-        f"DROP ROLE {creator_role_parent}",
-        f"DROP ROLE {creator_role_orphan}",
-    ]
+    if database_dialect == DatabaseDialect.GOOGLE_STANDARD_SQL:
+        ddl_remove_roles = [
+            f"REVOKE SELECT ON TABLE contacts FROM ROLE {creator_role_parent}",
+            f"DROP ROLE {creator_role_parent}",
+            f"DROP ROLE {creator_role_orphan}",
+        ]
+    elif database_dialect == DatabaseDialect.POSTGRESQL:
+        ddl_remove_roles = [
+            f"REVOKE SELECT ON TABLE contacts FROM {creator_role_parent}",
+            f"DROP ROLE {creator_role_parent}",
+            f"DROP ROLE {creator_role_orphan}",
+        ]
     # Revoke permission and Delete roles.
     operation = temp_db.update_ddl(ddl_remove_roles)
     operation.result(DBAPI_OPERATION_TIMEOUT)  # raises on failure / timeout.
 
 
 def test_list_database_role_success(
-    not_emulator,
-    shared_instance,
-    databases_to_delete,
-    not_postgres,
+    not_emulator, shared_instance, databases_to_delete, database_dialect
 ):
     creator_role_parent = _helpers.unique_id("role_parent", separator="_")
     creator_role_orphan = _helpers.unique_id("role_orphan", separator="_")
 
     temp_db_id = _helpers.unique_id("dfl_ldrr_upd_ddl", separator="_")
-    temp_db = shared_instance.database(temp_db_id)
+    temp_db = shared_instance.database(temp_db_id, database_dialect=database_dialect)
 
     create_op = temp_db.create()
     databases_to_delete.append(temp_db)