/**
* @param array $cached
* @param array $keyToQuery
* @return ResultDuplicator
*/
public function getResultDuplicator(array $cached, array $keyToQuery)
{
$results = $this->inner->expandCacheResult($cached, $keyToQuery);
// Allows us to flatten $results into a single $query array, then
// rebuild final return value in same structure and order as $results.
$duplicator = new ResultDuplicator($this->shallow->getPrimaryKeyColumns(), 2);
foreach ($results as $i => $rows) {
foreach ($rows as $j => $row) {
$duplicator->add($row, array($i, $j));
}
}
return $duplicator;
}
protected function findMostRecent(array $queries)
{
// SELECT MAX( rev_id ) AS rev_id
// FROM flow_tree_revision
// WHERE rev_type= 'post' AND rev_type_id IN (...)
// GROUP BY rev_type_id
$duplicator = new ResultDuplicator(array('rev_type_id'), 1);
foreach ($queries as $idx => $query) {
$query = UUID::convertUUIDs((array) $query, 'alphadecimal');
$duplicator->add($query, $idx);
}
$dbr = $this->dbFactory->getDB(DB_MASTER);
$res = $dbr->select(array('flow_revision'), array('rev_id' => "MAX( 'rev_id' )"), array('rev_type' => $this->getRevType()) + $this->preprocessSqlArray($this->buildCompositeInCondition($dbr, $duplicator->getUniqueQueries())), __METHOD__, array('GROUP BY' => 'rev_type_id'));
if (!$res) {
// TODO: dont fail, but dont end up caching bad result either
throw new DataModelException('query failure', 'process-data');
}
$revisionIds = array();
foreach ($res as $row) {
$revisionIds[] = $row->rev_id;
}
// Due to the grouping and max, we cant reliably get a full
// columns info in the above query, forcing the join below
// rather than just querying flow_revision.
return $this->findRevIdReal($duplicator, $revisionIds);
}
