    function __construct($delim = '.', $wait = false)
    {
        parent::__construct([], false, $wait);
        $this->_delim = $delim;
        $this->_objects = [];
    }
The software constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component.