Array
(
    [Field] => id
    [Type] => int(11)
    [Null] => NO
    [Key] => PRI
    [Default] => 
    [Extra] => auto_increment
)
Array
(
    [Field] => user_id
    [Type] => int(11)
    [Null] => YES
    [Key] => 
    [Default] => 
    [Extra] => 
)
Array
(
    [Field] => title
    [Type] => varchar(255)
    [Null] => NO
    [Key] => 
    [Default] => 
    [Extra] => 
)
Array
(
    [Field] => message
    [Type] => text
    [Null] => NO
    [Key] => 
    [Default] => 
    [Extra] => 
)
Array
(
    [Field] => type
    [Type] => enum('info','warning','success','error')
    [Null] => YES
    [Key] => 
    [Default] => info
    [Extra] => 
)
Array
(
    [Field] => is_read
    [Type] => tinyint(1)
    [Null] => YES
    [Key] => 
    [Default] => 0
    [Extra] => 
)
Array
(
    [Field] => created_at
    [Type] => timestamp
    [Null] => NO
    [Key] => 
    [Default] => current_timestamp()
    [Extra] => 
)
Array
(
    [Field] => target_role
    [Type] => varchar(50)
    [Null] => YES
    [Key] => 
    [Default] => 
    [Extra] => 
)