character_achievement_offline_updates 
The `character_achievement_offline_updates` table
Stores updates to character achievements when the character was offline
Table Structure
| Field | Type | Attributes | Key | Null | Default | Extra | Comment | 
|---|---|---|---|---|---|---|---|
| guid | INT | UNSIGNED | IDX | NO | |||
| update_type | TINYINT | UNSIGNED | NO | ||||
| arg1 | INT | UNSIGNED | NO | ||||
| arg2 | INT | UNSIGNED | YES | NULL | |||
| arg3 | INT | UNSIGNED | YES | NULL | 
Description of the fields
guid 
The GUID of the character. See characters.guid.
update_type 
Supported types: 1 - COMPLETE_ACHIEVEMENT; 2 - UPDATE_CRITERIA
arg1 
For type 1: achievement ID; for type 2: ACHIEVEMENT_CRITERIA_TYPE
arg2 
For type 2: miscValue1 for updating achievement criteria
arg3 
For type 2: miscValue1 for updating achievement criteria