function getSpecialSortAttrs($isCommon = 0, $cid = 0)
{
$sorting = new Sorting($this);
$sortAttrs = $sorting->getAttrs();
$s = "";
foreach ($sortAttrs as $attr) {
CustomField::getSortType($sortType, $sortSqlAttr, $isCommon, $cid, $attr);
if ($sortType == customfield_integer) {
$s .= ", 0+{$sortSqlAttr} AS {$attr}";
} elseif ($sortType == customfield_float) {
$s .= ", 0.0+{$sortSqlAttr} AS {$attr}";
} elseif ($sortType == customfield_date) {
$s .= ", IFNULL(CAST({$sortSqlAttr} AS DATE), '') AS {$attr}";
}
}
return $s;
}
