/**
* Implementation of SMWStore::getInProperties(). This function is meant to
* be used for finding properties that link to wiki pages.
* @todo When used for other datatypes, the function may return too many
* properties since it selects results by comparing the stored information
* (DB keys) only, while not currently comparing the type of the returned
* property to the type of the queried data. So values with the same DB keys
* can be confused. This is a minor issue now since no code is known to use
* this function in cases where this occurs.
*/
public function getInProperties(SMWDataValue $value, $requestoptions = null)
{
wfProfileIn("SMWSQLStoreLight::getInProperties (SMW)");
$db = wfGetDB(DB_SLAVE);
$result = array();
$typeid = $value->getTypeID();
if ($requestoptions !== null) {
// potentially need to get more results, since options apply to union
$suboptions = clone $requestoptions;
$suboptions->limit = $requestoptions->limit + $requestoptions->offset;
$suboptions->offset = 0;
} else {
$suboptions = null;
}
foreach (array('smwsimple_data', 'smwsimple_special') as $tablename) {
if (SMWSQLStoreLight::findTypeTableName($typeid) != $tablename) {
continue;
}
$valuestring = $tablename == 'smwsimple_special' ? reset($value->getDBkeys()) : serialize($value->getDBkeys());
$where = 'value=' . $db->addQuotes($valuestring);
$res = $db->select($tablename, 'DISTINCT propname', $where . $this->getSQLConditions($suboptions, 'propname', 'propname'), 'SMW::getInProperties', $this->getSQLOptions($suboptions, 'propname'));
foreach ($res as $row) {
$result[] = new SMWDIProperty($row->propname);
}
$db->freeResult($res);
}
$result = $this->applyRequestOptions($result, $requestoptions);
// apply options to overall result
wfProfileOut("SMWSQLStoreLight::getInProperties (SMW)");
return $result;
}