members_history.value

members:abstract

CREATE TABLE IF NOT EXISTS `members:abstract` (
 `id` INT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
 `type` enum('class','elected','appointed','status') NOT NULL,
  UNIQUE KEY (`id`, `type`)
) ENGINE=InnoDB  DEFAULT CHARSET=utf8 COLLATE=utf8_bin;

CREATE TABLE IF NOT EXISTS `members:appointed` (
 `id` INT UNSIGNED NOT NULL PRIMARY KEY, -- not auto_increment
 `name_prefix` varchar(8) collate utf8_bin NOT NULL COMMENT 'Prefix Added to Members Name',
 `hours_extra` decimal(4,2) NOT NULL COMMENT 'Hours Given as Bonus for Holding this Position.',
 `position` varchar(40) collate utf8_bin NOT NULL COMMENT 'Name of the Posisiton',
 FOREIGN KEY (`id`) REFERENCES `members:abstract` (`id`) ON DELETE CASCADE
) ENGINE=InnoDB  DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='Undefined within the SOP or By-Laws.';

DELIMITER //
DROP TRIGGER IF EXISTS ins_appointed//
CREATE TRIGGER ins_appointed BEFORE INSERT ON `members:appointed`
FOR EACH ROW BEGIN
  INSERT INTO `members:abstract` (`type`) VALUES ('appointed');
  SET NEW.id = LAST_INSERT_ID();
END; //
DELIMITER ;

CREATE TABLE IF NOT EXISTS `members_history` (
 `id` INT unsigned NOT NULL auto_increment COMMENT 'Unique Id',
 `mid` INT unsigned NOT NULL COMMENT 'Members Unique Id.',
 `value` INT UNSIGNED NOT NULL,
 `table` enum('class','elected','appointed','status') NOT NULL,
 `start` date NOT NULL COMMENT 'Value''s Effect Date',
 `end` date default NULL COMMENT 'Value''s Expiration Date',
 PRIMARY KEY (`id`),
 FOREIGN KEY (`mid`) REFERENCES `members` (`id`) ON DELETE CASCADE,
 FOREIGN KEY (`value`, `table`) REFERENCES `members:abstract` (`id`, `type`) ON DELETE CASCADE
) ENGINE=InnoDB  DEFAULT CHARSET=latin1 COMMENT='Member History';

SELECT m.username,
  m.password, m.salt, m.name_first, m.name_last,
  MAX(a.name_prefix) AS name_prefix,
  COALESCE(MAX(a.hours_extra), MAX(e.hours_extra)) AS hours_extra,
  MAX(m.date_join) AS date_join,
  MAX(m.date_leave) AS date_leave,
  MAX(a.position) AS appointed,
  MAX(c.class) AS class,
  MAX(e.position) AS elected,
  MAX(s.status) AS status
FROM `members` m
JOIN `members_history` h ON (h.mid = m.id)
LEFT OUTER JOIN `members:appointed` a ON (h.table = 'appointed' AND h.value = a.id)
LEFT OUTER JOIN `members:class` c ON (h.table = 'class' AND h.value = c.id)
LEFT OUTER JOIN `members:elected` e ON (h.table = 'elected' AND h.value = e.id)
LEFT OUTER JOIN `members:status` s ON (h.table = 'status' AND h.value = s.id)
GROUP BY m.id;