SET FOREIGN_KEY_CHECKS=0;
ALTER TABLE `document_fields_link` ADD COLUMN `metadata_version_id` int(11) default NULL;
ALTER TABLE `document_fields_link` ADD INDEX `metadata_version_id` (`metadata_version_id`);

CREATE TABLE `document_content_version` (
  `id` int(11) NOT NULL default '0',
  `document_id` int(11) NOT NULL default '0',
  `filename` text NOT NULL,
  `size` bigint(20) NOT NULL default '0',
  `mime_id` int(11) NOT NULL default '0',
  `major_version` int(11) NOT NULL default '0',
  `minor_version` int(11) NOT NULL default '0',
  `storage_path` varchar(250) default NULL,
  UNIQUE KEY `id` (`id`),
  KEY `storage_path` (`storage_path`),
  KEY `document_id` (`document_id`)
) TYPE=InnoDB;

CREATE TABLE `document_metadata_version` (
  `id` int(11) NOT NULL default '0',
  `document_id` int(11) NOT NULL default '0',
  `content_version_id` int(11) NOT NULL default '0',
  `document_type_id` int(11) NOT NULL default '0',
  `name` text NOT NULL,
  `description` varchar(200) NOT NULL default '',
  `status_id` int(11) default NULL,
  `metadata_version` int(11) NOT NULL default '0',
  `version_created` datetime NOT NULL default '0000-00-00 00:00:00',
  `version_creator_id` int(11) NOT NULL default '0',
  UNIQUE KEY `id` (`id`),
  KEY `fk_document_type_id` (`document_type_id`),
  KEY `fk_status_id` (`status_id`),
  KEY `document_id` (`document_id`),
  KEY `version_created` (`version_created`),
  KEY `version_creator_id` (`version_creator_id`),
  KEY `content_version_id` (`content_version_id`),
  CONSTRAINT `document_metadata_version_ibfk_4` FOREIGN KEY (`document_id`) REFERENCES `documents` (`id`) ON DELETE CASCADE,
  CONSTRAINT `document_metadata_version_ibfk_5` FOREIGN KEY (`document_type_id`) REFERENCES `document_types_lookup` (`id`),
  CONSTRAINT `document_metadata_version_ibfk_6` FOREIGN KEY (`status_id`) REFERENCES `status_lookup` (`id`),
  CONSTRAINT `document_metadata_version_ibfk_7` FOREIGN KEY (`version_creator_id`) REFERENCES `users` (`id`)
) TYPE=InnoDB;

ALTER TABLE `documents` ADD metadata_version_id int(11) default NULL;
ALTER TABLE `documents` ADD INDEX `metadata_version_id` (`metadata_version_id`);

CREATE TABLE `zseq_document_content_version` (
  `id` int(10) unsigned NOT NULL auto_increment,
  PRIMARY KEY  (`id`)
) TYPE=MyISAM;

CREATE TABLE `zseq_document_metadata_version` (
  `id` int(10) unsigned NOT NULL auto_increment,
  PRIMARY KEY  (`id`)
) TYPE=MyISAM;
SET FOREIGN_KEY_CHECKS=1;