diff --git a/Database/Command.php b/Database/Command.php
index 26bc33a5..8afa8f60 100644
--- a/Database/Command.php
+++ b/Database/Command.php
@@ -218,7 +218,8 @@ class Command extends Component
 	 */
 	private function search($type)
 	{
-		if (!(($connect = $this->db->getConnect($this->sql)) instanceof PDO)) {
+		$connect = $this->db->getConnect($this->sql);
+		if (!($connect instanceof PDO)) {
 			return null;
 		}
 		if (!($query = $connect->query($this->sql))) return null;
diff --git a/System/Pool/Connection.php b/System/Pool/Connection.php
index 87450701..74a9f9b1 100644
--- a/System/Pool/Connection.php
+++ b/System/Pool/Connection.php
@@ -198,9 +198,6 @@ class Connection extends Pool
 	 */
 	public function getConnection(array $config, $isMaster = false)
 	{
-		if ($this->creates === 0) {
-			$this->creates = Timer::tick(10000, [$this, 'Heartbeat_detection']);
-		}
 		$coroutineName = $this->name($config['cds'], $isMaster);
 		if (!isset($this->hasCreate[$coroutineName])) {
 			$this->hasCreate[$coroutineName] = 0;
@@ -243,6 +240,9 @@ class Connection extends Pool
 		if ($number = Context::getContext('begin_' . $coroutineName, Coroutine::getCid())) {
 			$number > 0 && $client->beginTransaction();
 		}
+		if ($this->creates === 0) {
+			$this->creates = Timer::tick(10000, [$this, 'Heartbeat_detection']);
+		}
 		return $client;
 	}