symfony
diff --git a/‎src/Symfony/Component/Security/Acl/Dbal/MutableAclProvider.php‎
Lines changed: 27 additions & 0 deletions b/‎src/Symfony/Component/Security/Acl/Dbal/MutableAclProvider.php‎
Lines changed: 27 additions & 0 deletions
@@ -108,6 +108,18 @@ public function deleteAcl(ObjectIdentityInterface $oid)
         }
     }
 
+    /**
+     * Deletes the security identity from the database.
+     * ACL entries have the CASCADE option on their foreign key so they will also get deleted
+     *
+     * @param SecurityIdentityInterface $sid
+     * @throws \InvalidArgumentException
+     */
+    public function deleteSecurityIdentity(SecurityIdentityInterface $sid)
+    {
+        $this->connection->executeQuery($this->getDeleteSecurityIdentityIdSql($sid));
+    }
+
     /**
      * {@inheritDoc}
      */
@@ -595,6 +607,21 @@ protected function getSelectSecurityIdentityIdSql(SecurityIdentityInterface $sid
         );
     }
 
+    /**
+     * Constructs the SQL to delete a security identity.
+     *
+     * @param SecurityIdentityInterface $sid
+     * @throws \InvalidArgumentException
+     * @return string
+     */
+    protected function getDeleteSecurityIdentityIdSql(SecurityIdentityInterface $sid)
+    {
+        $select = $this->getSelectSecurityIdentityIdSql($sid);
+        $delete = preg_replace('/^SELECT id FROM/', 'DELETE FROM', $select);
+
+        return $delete;
+    }
+
     /**
      * Constructs the SQL for updating an object identity.
      *