Ferreteria/sql/user client

About

• Status: design is under construction
• Fields
  • CRC: checksum uniquely identifying user's IP address and browser client software. See notes.
• Notes:
  • For identifying the user, decided to use CRC32 instead of compression because the compressed strings always came out at least as long as the original string. They were probably designed to be effective for rather longer data.

SQL

<section begin=sql /><mysql>DROP TABLE IF EXISTS `shop_clients`; CREATE TABLE `shop_clients` (

 `ID`         INT NOT NULL AUTO_INCREMENT,
 `CRC`        INT UNSIGNED NOT NULL COMMENT "crc32(Address+Browser) - unique integer defined by client specs",
 `Address`    VARCHAR(15) NOT NULL COMMENT "IP address of client",
 `Domain`     VARCHAR(255) COMMENT "Domain name of client",
 `Browser`    VARCHAR(255) COMMENT "Browser USER_AGENT string",
 `WhenFirst`  DATETIME NOT NULL COMMENT "When this client was first seen",
 `WhenFinal`  DATETIME COMMENT "When this client was most recently seen",
 PRIMARY KEY(`ID`),
 UNIQUE KEY(`CRC`)
) ENGINE = MYISAM;</mysql>

<section end=sql />