- if (common_config('db', 'type') == 'pgsql') {
- $weightexpr='sum(exp(-extract(epoch from (now() - notice_tag.created)) / %s))';
- } else {
- $weightexpr='sum(exp(-(now() - notice_tag.created) / %s))';
- }
-
- $qry = 'SELECT notice_tag.tag, '.
+ $weightexpr = common_sql_weight('notice_tag.created', common_config('tag', 'dropoff'));
+ // @fixme should we use the cutoff too? Doesn't help with indexing per-user.
+
+ $qry = 'SELECT notice_tag.tag, '.