friendica/doc/database/db_hook.md

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Table hook
===========
addon hook registry
Fields
------
| Field | Description | Type | Null | Key | Default | Extra |
| -------- | ---------------------------------------------------------------------------------------------------------- | ----------------- | ---- | --- | ------- | -------------- |
| id | sequential ID | int unsigned | NO | PRI | NULL | auto_increment |
| hook | name of hook | varbinary(100) | NO | | | |
| file | relative filename of hook handler | varbinary(200) | NO | | | |
| function | function name of hook handler | varbinary(200) | NO | | | |
| priority | not yet implemented - can be used to sort conflicts in hook handling by calling handlers in priority order | smallint unsigned | NO | | 0 | |
Indexes
------------
| Name | Fields |
|------|---------|
| PRIMARY | id |
| priority | priority |
| hook_file_function | UNIQUE, hook, file, function |
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