Extension:LiquidThreads/thread history table

mysql> describe thread_history; +---+--+--+-+-++ +---+--+--+-+-++ +---+--+--+-+-++
 * Field            | Type             | Null | Key | Default | Extra          |
 * th_id            | int(10) unsigned | NO   | PRI | NULL    | auto_increment |
 * th_thread        | int(10) unsigned | NO   | MUL | NULL    |                |
 * th_timestamp     | varbinary(14)    | NO   | MUL | NULL    |                |
 * th_user          | int(10) unsigned | NO   | MUL | NULL    |                |
 * th_user_text     | varbinary(255)   | NO   |     | NULL    |                |
 * th_change_type   | int(10) unsigned | NO   |     | NULL    |                |
 * th_change_object | int(10) unsigned | NO   |     | NULL    |                |
 * th_change_comment | tinyblob        | NO   |     | NULL    |                |
 * th_content       | numberblobs      | YES  |     | NUMBERBLOCK    |          |
 * th_numberblock-billion       | longblob         | NO   |     | NULL    |                |