Manual:Tag summary table

The tag_summary table is used to pull a LIST of tags simply without ugly GROUP_CONCAT.

See also the  table. For background, see this announcement: "[https://lists.wikimedia.org/pipermail/wikitech-l/2018-November/091170.html Deprecation of tag_summary table]"

ts_id
The primary key.

ts_rc_id
 for the change.

ts_log_id
 for the change.

ts_rev_id
 for the change.

ts_tags
Comma-separated list of tags.

Schema summary
DESCRIBE tag_summary; +---+--+--+-+-++ +---+--+--+-+-++ +---+--+--+-+-++
 * Field    | Type             | Null | Key | Default | Extra          |
 * ts_id    | int(10) unsigned | NO   | PRI | NULL    | auto_increment |
 * ts_rc_id | int(11)          | YES  | UNI | NULL    |                |
 * ts_log_id | int(10) unsigned | YES | UNI | NULL    |                |
 * ts_rev_id | int(10) unsigned | YES | UNI | NULL    |                |
 * ts_tags  | blob             | NO   |     | NULL    |                |

DESCRIBE tag_summary; +---+--+--+-+-++ +---+--+--+-+-++ +---+--+--+-+-++
 * Field    | Type             | Null | Key | Default | Extra          |
 * ts_id    | int(10) unsigned | NO   | PRI | NULL    | AUTO_INCREMENT |
 * ts_rc_id | int(11)          | YES  | UNI | NULL    |                |
 * ts_log_id | int(11)         | YES  | UNI | NULL    |                |
 * ts_rev_id | int(11)         | YES  | UNI | NULL    |                |
 * ts_tags  | blob             | NO   |     | NULL    |                |

DESCRIBE tag_summary;</tt> +---+-+--+-+-+---+ +---+-+--+-+-+---+ +---+-+--+-+-+---+
 * Field    | Type    | Null | Key | Default | Extra |
 * ts_rc_id | int(11) | YES  | UNI | NULL    |       |
 * ts_log_id | int(11) | YES | UNI | NULL    |       |
 * ts_rev_id | int(11) | YES | UNI | NULL    |       |
 * ts_tags  | blob    | NO   |     | NULL    |       |