fix(model/helper): represent RLS filter clause in proper textual SQL string (#32406)

Signed-off-by: hainenber <dotronghai96@gmail.com>

tests/unit_tests/models/helpers_test.py

@@ -25,7 +25,7 @@ from unittest.mock import patch
 
 import pytest
 from pytest_mock import MockerFixture
-from sqlalchemy import create_engine
+from sqlalchemy import create_engine, text
 from sqlalchemy.orm.session import Session
 from sqlalchemy.pool import StaticPool
 
@@ -201,10 +201,12 @@ def test_values_for_column_double_percents(
     )
     # make sure final query has single percents
     with database.get_sqla_engine() as engine:
-        pd.read_sql_query.assert_called_with(
-            sql=(
-                "SELECT DISTINCT CASE WHEN b LIKE 'A%' THEN 'yes' ELSE 'nope' END "
-                "AS column_values \nFROM t\n LIMIT 10000 OFFSET 0"
-            ),
-            con=engine,
+        expected_sql = text(
+            "SELECT DISTINCT CASE WHEN b LIKE 'A%' THEN 'yes' ELSE 'nope' END "
+            "AS column_values \nFROM t\n LIMIT 10000 OFFSET 0"
         )
+        called_sql = pd.read_sql_query.call_args.kwargs["sql"]
+        called_conn = pd.read_sql_query.call_args.kwargs["con"]
+
+        assert called_sql.compare(expected_sql) is True
+        assert called_conn == engine