doc/database/db_cache.md

   1 Table cache
   2 ===========
   3
   4 | Field        | Description                        | Type         | Null | Key | Default             | Extra |
   5 | ------------ | ---------------------------------- | ------------ | ---- | --- | ------------------- | ----- |
   6 | k            | horizontal width + url or resource | varchar(255) | NO   | PRI | NULL                |       |
   7 | v            | OEmbed response from site          | text         | NO   |     | NULL                |       |
   8 | updated      | datetime of cache insertion        | datetime     | NO   | MUL | 0000-00-00 00:00:00 |       |
   9 | expire_mode  |                                    | int(11)      | NO   |     | 0                   |       |
  10
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