diff --git a/kiri-engine/Pool/Connection.php b/kiri-engine/Pool/Connection.php
index ced22760..79632d86 100644
--- a/kiri-engine/Pool/Connection.php
+++ b/kiri-engine/Pool/Connection.php
@@ -133,9 +133,11 @@ class Connection extends Component
 		$this->pool->initConnections($config['cds'], $max, static function () use ($config) {
 			$link = new PDO('mysql:dbname=' . $config['dbname'] . ';host=' . $config['cds'],
 				$config['username'], $config['password'], [
-					PDO::ATTR_EMULATE_PREPARES   => true,
 					PDO::ATTR_CASE               => PDO::CASE_NATURAL,
-					PDO::ATTR_PERSISTENT         => false,
+					PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
+					PDO::ATTR_ORACLE_NULLS       => PDO::NULL_NATURAL,
+					PDO::ATTR_STRINGIFY_FETCHES  => false,
+					PDO::ATTR_EMULATE_PREPARES   => false,
 					PDO::ATTR_TIMEOUT            => $config['connect_timeout'],
 					PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES ' . ($config['charset'] ?? 'utf8mb4')
 				]);