diff --git a/Command.php b/Command.php
index e4cdad9..c2332e7 100644
--- a/Command.php
+++ b/Command.php
@@ -77,8 +77,8 @@ class Command extends Component
      */
     public function all(): bool|array
     {
-        $client = $this->connection->getConnection();
         try {
+            $client = $this->connection->getConnection();
             if (($prepare = $client->prepare($this->sql)) === false) {
                 throw new Exception($client->errorInfo()[1]);
             }
@@ -91,7 +91,9 @@ class Command extends Component
             }
             return $result;
         } finally {
-            $this->connection->release($client);
+            if (isset($client)) {
+                $this->connection->release($client);
+            }
         }
     }
 
@@ -101,8 +103,8 @@ class Command extends Component
      */
     public function one(): null|bool|array
     {
-        $client = $this->connection->getConnection();
         try {
+            $client = $this->connection->getConnection();
             if (($prepare = $client->prepare($this->sql)) === false) {
                 throw new Exception($client->errorInfo()[1]);
             }
@@ -115,7 +117,9 @@ class Command extends Component
             }
             return $result;
         } finally {
-            $this->connection->release($client);
+            if (isset($client)) {
+                $this->connection->release($client);
+            }
         }
     }
 
@@ -125,8 +129,8 @@ class Command extends Component
      */
     public function fetchColumn(): mixed
     {
-        $client = $this->connection->getConnection();
         try {
+            $client = $this->connection->getConnection();
             if (($prepare = $client->prepare($this->sql)) === false) {
                 throw new Exception($client->errorInfo()[1]);
             }
@@ -139,7 +143,9 @@ class Command extends Component
             }
             return $result;
         } finally {
-            $this->connection->release($client);
+            if (isset($client)) {
+                $this->connection->release($client);
+            }
         }
     }
 
@@ -161,8 +167,8 @@ class Command extends Component
      */
     private function _execute(): bool|int
     {
-        $client = $this->connection->getConnection();
         try {
+            $client = $this->connection->getConnection();
             if (($prepare = $client->prepare($this->sql)) === false) {
                 throw new Exception($client->errorInfo()[1]);
             }
@@ -182,7 +188,9 @@ class Command extends Component
             }
             return $result;
         } finally {
-            $this->connection->release($client);
+            if (isset($client)) {
+                $this->connection->release($client);
+            }
         }
     }