Table post
===========

Structure for all posts

| Field         | Description                                                                       | Type              | Null | Key | Default             | Extra |
| ------------- | --------------------------------------------------------------------------------- | ----------------- | ---- | --- | ------------------- | ----- |
| uri-id        | Id of the item-uri table entry that contains the item uri                         | int unsigned      | NO   | PRI | NULL                |       |
| parent-uri-id | Id of the item-uri table that contains the parent uri                             | int unsigned      | YES  |     | NULL                |       |
| thr-parent-id | Id of the item-uri table that contains the thread parent uri                      | int unsigned      | YES  |     | NULL                |       |
| external-id   | Id of the item-uri table entry that contains the external uri                     | int unsigned      | YES  |     | NULL                |       |
| created       | Creation timestamp.                                                               | datetime          | NO   |     | 0001-01-01 00:00:00 |       |
| edited        | Date of last edit (default is created)                                            | datetime          | NO   |     | 0001-01-01 00:00:00 |       |
| received      | datetime                                                                          | datetime          | NO   |     | 0001-01-01 00:00:00 |       |
| gravity       |                                                                                   | tinyint unsigned  | NO   |     | 0                   |       |
| network       | Network from where the item comes from                                            | char(4)           | NO   |     |                     |       |
| owner-id      | Link to the contact table with uid=0 of the owner of this item                    | int unsigned      | NO   |     | 0                   |       |
| author-id     | Link to the contact table with uid=0 of the author of this item                   | int unsigned      | NO   |     | 0                   |       |
| causer-id     | Link to the contact table with uid=0 of the contact that caused the item creation | int unsigned      | YES  |     | NULL                |       |
| post-type     | Post type (personal note, image, article, ...)                                    | tinyint unsigned  | NO   |     | 0                   |       |
| vid           | Id of the verb table entry that contains the activity verbs                       | smallint unsigned | YES  |     | NULL                |       |
| private       | 0=public, 1=private, 2=unlisted                                                   | tinyint unsigned  | NO   |     | 0                   |       |
| global        |                                                                                   | boolean           | NO   |     | 0                   |       |
| visible       |                                                                                   | boolean           | NO   |     | 0                   |       |
| deleted       | item has been marked for deletion                                                 | boolean           | NO   |     | 0                   |       |

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