added markers for handling insert

backends/postgres/src/postgres_statement.cpp

@@ -23,6 +23,11 @@ utils::result<sql::execute_result, utils::error> postgres_statement::execute(con
   if (!postgres_bindings) {
     return utils::failure(utils::error(sql::error_code::EXECUTE_FAILED, "Failed to cast bindings to postgres bindings"));
   }
+
+  if (query_.command == sql::sql_command::Insert) {
+    // handle insert command with the primary key generator strategy
+  }
+
   PGresult *res = PQexecPrepared(db_,
       name_.c_str(),
       static_cast<int>(postgres_bindings->params().values.size()),