documentation added to tables
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		@@ -23,7 +23,29 @@
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require_once("opendb.php");
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try {
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  $db->query('create table if not exists message (id int primary key not null auto_increment, time timestamp default current_timestamp, user varchar(50) not null, msg longtext not null, foreign key (user) references user(name) on delete cascade on update cascade) character set utf8 engine=innodb;');
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  $query = <<<EOD
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    create table if not exists
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      message (
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        id
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          int primary key not null auto_increment
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          comment "id of the message, it is used in the client to check if a message has already been downloaded or not",
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        time
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          timestamp default current_timestamp
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          comment "time when the message has been stored on the server",
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        user
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          varchar(50) not null
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          comment "name of the user that sent the message",
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        msg
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          longtext not null
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          comment "message content, must be armored gnupg encrypted format",
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        foreign key (user)
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          references user(name)
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          on delete cascade
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          on update cascade
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      ) character set utf8 engine=innodb
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        comment="table to hold all messages for later download by the receiver";
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EOD;
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  $db->query($query);
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  $db->query('set global max_allowed_packet=1000000000');
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  $db->query('set global net_buffer_length=1000000');
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} catch (Exception $e) {
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