- `id` int NOT NULL auto_increment COMMENT '',
- `cid` int NOT NULL DEFAULT 0 COMMENT '',
- `network` varchar(32) NOT NULL DEFAULT '' COMMENT '',
- `created` datetime NOT NULL DEFAULT '0001-01-01 00:00:00' COMMENT '',
- `last` datetime NOT NULL DEFAULT '0001-01-01 00:00:00' COMMENT '',
+ `id` int unsigned NOT NULL auto_increment COMMENT '',
+ `cid` int unsigned NOT NULL DEFAULT 0 COMMENT 'Message receiver',
+ `network` char(4) NOT NULL DEFAULT '' COMMENT 'Receiver\'s network',
+ `guid` varchar(255) NOT NULL DEFAULT '' COMMENT 'Unique GUID of the message',
+ `created` datetime NOT NULL DEFAULT '0001-01-01 00:00:00' COMMENT 'Date, when the message was created',
+ `last` datetime NOT NULL DEFAULT '0001-01-01 00:00:00' COMMENT 'Date of last trial',
+ `next` datetime NOT NULL DEFAULT '0001-01-01 00:00:00' COMMENT 'Next retrial date',
+ `retrial` tinyint NOT NULL DEFAULT 0 COMMENT 'Retrial counter',