public function getSql(SqlWalker $sqlWalker)
{
//return 'DATE_FORMAT(' . $sqlWalker->walkArithmeticExpression($this->dateExpression) . ',' . $sqlWalker->walkStringPrimary($this->formatExpression) . ')';
return 'DATE_FORMAT(' . $this->dateExpression->dispatch($sqlWalker) . ',' . $this->formatExpression->dispatch($sqlWalker) . ')';
}