/**
* Return a partial WHERE clause to limit the search to the given namespaces
* @return String
*/
function queryNamespaces()
{
if (is_null($this->namespaces)) {
return '';
}
# search all
if (!count($this->namespaces)) {
$namespaces = '0';
} else {
$namespaces = $this->db->makeList($this->namespaces);
}
return 'AND page_namespace IN (' . $namespaces . ')';
}