Add locking and unlocking for warranty serial queue table when deleting an entry. #708

src/Command/LoadWarrantySerialCommand.php

@@ -392,12 +392,18 @@ class LoadWarrantySerialCommand extends Command
     {
         // prepared statement
         $db = $this->em->getConnection();
+
+        // lock the warranty serial queue table
+        $db->exec('LOCK TABLES warranty_serial_queue WRITE;');
+
         $delete_stmt = $db->prepare('DELETE FROM warranty_serial_queue
             WHERE id = :id');
 
         $res = $delete_stmt->execute([
             ':id' => $id,
         ]);
+
+        $db->exec('UNLOCK TABLES;');
     }
 
     protected function setOutputInfo($filename, $file_id, $has_error, $error_message, $entries, $orig_filename)