value = $value; $this->alias = $alias; } public function getAlias(): string { return $this->alias; } public function getValue(): mixed { return $this->value; } protected function addValue(SQL $sql, array &$params): string { return $sql->addValue($this->value, $params); } public function getExpression(SQL $sql, array &$params): string { return $this->addValue($sql, $params) . " AS " . $this->getAlias(); } }