protected function buildOrderBy($sidx, $sord) { #Special sorting for column 'discount' if ($sidx == 'discount') { return "\r\n\t\t\t\tORDER BY\r\n\t\t\t\t\t(CASE WHEN discount = 0.1 THEN 0 ELSE 1 END) {$sord},\r\n\t\t\t\t\t{$sidx} {$sord},\r\n\t\t\t\t\tfirst_name {$sord},\r\n\t\t\t\t\tlast_name {$sord}\r\n\t\t\t"; } return parent::buildOrderBy($sidx, $sord); }