+ /**
+ * Same self::tagUsageStatistics() but uses change_tag_def.
+ *
+ * @return array Array of string => int
+ */
+ private static function newTagUsageStatistics() {
+ $dbr = wfGetDB( DB_REPLICA );
+ $res = $dbr->select(
+ 'change_tag_def',
+ [ 'ctd_name', 'ctd_count' ],
+ [],
+ __METHOD__,
+ [ 'ORDER BY' => 'ctd_count DESC' ]
+ );
+
+ $out = [];
+ foreach ( $res as $row ) {
+ $out[$row->ctd_name] = $row->ctd_count;
+ }
+
+ return $out;
+ }
+