Fixed #36112 -- Added fallback in last_executed_query() on Oracle and PostgreSQL.

django/db/backends/oracle/operations.py

@@ -352,7 +352,11 @@ END;
                 statement = statement.replace(
                     key, force_str(params[key], errors="replace")
                 )
-        return statement
+        return (
+            super().last_executed_query(cursor, sql, params)
+            if statement is None
+            else statement
+        )
 
     def last_insert_id(self, cursor, table_name, pk_name):
         sq_name = self._get_sequence_name(cursor, strip_quotes(table_name), pk_name)

django/db/backends/postgresql/operations.py

@@ -302,11 +302,11 @@ class DatabaseOperations(BaseDatabaseOperations):
                 try:
                     return self.compose_sql(sql, params)
                 except errors.DataError:
-                    return None
+                    return super().last_executed_query(cursor, sql, params)
             else:
                 if cursor._query and cursor._query.query is not None:
                     return cursor._query.query.decode()
-                return None
+                return super().last_executed_query(cursor, sql, params)
 
     else:
 
@@ -315,7 +315,7 @@ class DatabaseOperations(BaseDatabaseOperations):
             # The query attribute is a Psycopg extension to the DB API 2.0.
             if cursor.query is not None:
                 return cursor.query.decode()
-            return None
+            return super().last_executed_query(cursor, sql, params)
 
     if is_psycopg3:
 

tests/backends/base/test_operations.py

@@ -171,6 +171,19 @@ class DatabaseOperationTests(TestCase):
     def setUp(self):
         self.ops = BaseDatabaseOperations(connection=connection)
 
+    def test_last_executed_query_base_fallback(self):
+        sql = "INVALID SQL"
+        params = []
+        with connection.cursor() as cursor:
+            cursor.close()
+            try:
+                cursor.execute(sql, params)
+            except connection.features.closed_cursor_error_class:
+                pass
+            self.assertIsNotNone(
+                connection.ops.last_executed_query(cursor, sql, params),
+            )
+
     @skipIfDBFeature("can_distinct_on_fields")
     def test_distinct_on_fields(self):
         msg = "DISTINCT ON fields is not supported by this database backend"