    private function applyParts(array $parts)
    {
        $this->scheme = isset($parts['scheme'])
            ? $this->filterScheme($parts['scheme'])
            : '';
        $this->userInfo = isset($parts['user']) ? $parts['user'] : '';
        $this->host = isset($parts['host']) ? $parts['host'] : '';
        $this->port = !empty($parts['port'])
            ? $this->filterPort($this->scheme, $this->host, $parts['port'])
            : null;
        $this->path = isset($parts['path'])
            ? $this->filterPath($parts['path'])
            : '';
        $this->query = isset($parts['query'])
            ? $this->filterQueryAndFragment($parts['query'])
            : '';
        $this->fragment = isset($parts['fragment'])
            ? $this->filterQueryAndFragment($parts['fragment'])
            : '';
        if (isset($parts['pass'])) {
            $this->userInfo .= ':' . $parts['pass'];
        }
    }
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.