Array
(
    [Field] => id
    [Type] => int(11)
    [Null] => NO
    [Key] => PRI
    [Default] => 
    [Extra] => auto_increment
)
Array
(
    [Field] => room_id
    [Type] => int(11)
    [Null] => NO
    [Key] => MUL
    [Default] => 
    [Extra] => 
)
Array
(
    [Field] => sender_id
    [Type] => int(11)
    [Null] => NO
    [Key] => 
    [Default] => 
    [Extra] => 
)
Array
(
    [Field] => sender_role
    [Type] => enum('user','admin')
    [Null] => NO
    [Key] => 
    [Default] => 
    [Extra] => 
)
Array
(
    [Field] => message
    [Type] => text
    [Null] => NO
    [Key] => 
    [Default] => 
    [Extra] => 
)
Array
(
    [Field] => is_read
    [Type] => tinyint(1)
    [Null] => YES
    [Key] => 
    [Default] => 0
    [Extra] => 
)
Array
(
    [Field] => created_at
    [Type] => timestamp
    [Null] => YES
    [Key] => 
    [Default] => current_timestamp()
    [Extra] => 
)