Extension:LiquidThreads/historical thread table

mysql> describe historical_thread; +---+-+--+-+-+---+ +---+-+--+-+-+---+ +---+-+--+-+-+---+
 * Field                | Type            | Null | Key | Default | Extra |
 * hthread_id           | int(8) unsigned | NO   | PRI | NULL    |       |
 * hthread_revision     | int(8) unsigned | NO   | PRI | NULL    |       |
 * hthread_contents     | blob            | NO   |     | NULL    |       |
 * hthread_change_type  | int(4) unsigned | NO   |     | NULL    |       |
 * hthread_change_object | int(8) unsigned | YES |     | NULL    |       |