tag_summary duplicates data in change_tag, but is missing some records.
Eg:
select * from change_tag where ct_rev_id = 563615370;
+-----------+-----------+-----------+--------------+-----------+
ct_rc_id | ct_log_id | ct_rev_id | ct_tag | ct_params |
+-----------+-----------+-----------+--------------+-----------+
589674173 | NULL | 563615370 | visualeditor | NULL |
+-----------+-----------+-----------+--------------+-----------+
select * from tag_summary where ts_rev_id = 563615370;
Empty set (0.01 sec)
Cause unknown at time of writing.
Relevant recent activity:
https://bugzilla.wikimedia.org/show_bug.cgi?id=40867
Version: unspecified
Severity: major