friendica-github/doc/database/db_workerqueue.md

Table workerqueue
===========

Background tasks queue entries

Fields
------

| Field     | Description                                             | Type             | Null | Key | Default             | Extra          |
| --------- | ------------------------------------------------------- | ---------------- | ---- | --- | ------------------- | -------------- |
| id        | Auto incremented worker task id                         | int unsigned     | NO   | PRI | NULL                | auto_increment |
| command   | Task command                                            | varchar(100)     | YES  |     | NULL                |                |
| parameter | Task parameter                                          | mediumtext       | YES  |     | NULL                |                |
| priority  | Task priority                                           | tinyint unsigned | NO   |     | 0                   |                |
| created   | Creation date                                           | datetime         | NO   |     | 0001-01-01 00:00:00 |                |
| pid       | Process id of the worker                                | int unsigned     | NO   |     | 0                   |                |
| executed  | Execution date                                          | datetime         | NO   |     | 0001-01-01 00:00:00 |                |
| next_try  | Next retrial date                                       | datetime         | NO   |     | 0001-01-01 00:00:00 |                |
| retrial   | Retrial counter                                         | tinyint          | NO   |     | 0                   |                |
| done      | Marked 1 when the task was done - will be deleted later | boolean          | NO   |     | 0                   |                |

Indexes
------------

| Name                          | Fields                           |
| ----------------------------- | -------------------------------- |
| PRIMARY                       | id                               |
| command                       | command                          |
| done_command_parameter        | done, command, parameter(64)     |
| done_executed                 | done, executed                   |
| done_priority_retrial_created | done, priority, retrial, created |
| done_priority_next_try        | done, priority, next_try         |
| done_pid_next_try             | done, pid, next_try              |
| done_pid_retrial              | done, pid, retrial               |
| done_pid_priority_created     | done, pid, priority, created     |


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