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POmySQL MATCH across multiple tables
 

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    <p>I have a set of 4 tables that I want to search across. Each has a full text index. Can a query make use of every index?</p> <pre><code>CREATE TABLE `categories` ( `id` int(5) unsigned NOT NULL auto_increment, `display_order` int(5) unsigned default NULL, `name` varchar(64) default NULL, `last_modified` timestamp NOT NULL default CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP, PRIMARY KEY (`id`), UNIQUE KEY `order` (`display_order`), FULLTEXT KEY `full_name` (`name`) ) ENGINE=MyISAM AUTO_INCREMENT=6 DEFAULT CHARSET=latin1; CREATE TABLE `host_types` ( `id` int(5) unsigned NOT NULL auto_increment, `category_id` int(5) unsigned default NULL, `display_order` int(5) unsigned default NULL, `name` varchar(64) default NULL, `last_modified` timestamp NOT NULL default CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP, PRIMARY KEY (`id`), UNIQUE KEY `order` (`category_id`,`display_order`), FULLTEXT KEY `full_name` (`name`) ) ENGINE=MyISAM AUTO_INCREMENT=13 DEFAULT CHARSET=latin1; CREATE TABLE `hosts` ( `id` int(5) unsigned NOT NULL auto_increment, `host_id` int(5) unsigned default NULL, `display_order` int(5) unsigned default NULL, `name` varchar(64) default NULL, `last_modified` timestamp NOT NULL default CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP, PRIMARY KEY (`id`), UNIQUE KEY `order` (`host_id`,`display_order`), FULLTEXT KEY `full_name` (`name`) ) ENGINE=MyISAM AUTO_INCREMENT=4 DEFAULT CHARSET=latin1; CREATE TABLE `products` ( `id` int(11) unsigned NOT NULL auto_increment, `host_id` int(5) unsigned default NULL, `display_order` int(5) unsigned default NULL, `uid` varchar(10) default NULL, `name` varchar(128) default NULL, `keywords` text, `description` text, `price` decimal(10,2) default NULL, `quantity` int(11) unsigned default NULL, `last_modified` timestamp NOT NULL default CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP, PRIMARY KEY (`id`), FULLTEXT KEY `full_name` (`name`,`keywords`,`description`,`uid`) ) ENGINE=MyISAM AUTO_INCREMENT=14 DEFAULT CHARSET=latin1; </code></pre> <p>Here is my query;</p> <pre><code>SELECT categories.name AS category, categories.id AS category_id, host_types.name AS host_type, host_types.id AS host_type_id, hosts.name AS host, hosts.id AS host_id, products.name as name, products.id AS product_id, products.keywords as keywords, products.description AS description, products.quantity AS quantity, products.price AS price, products.uid as catalogue, MATCH(categories.name, host_types.name, hosts.name, products.name, products.keywords, products.description, products.uid) AGAINST('search term') as score FROM products LEFT JOIN hosts ON products.host_id = hosts.id LEFT JOIN host_types ON hosts.host_id = host_types.id LEFT JOIN categories ON host_types.category_id = categories.id WHERE MATCH(categories.name, host_types.name, hosts.name, products.name, products.keywords, products.description, products.uid) AGAINST('search term') ORDER BY score DESC; </code></pre> <ul> <li>categories.name == FULLTEXT - 1</li> <li>host_types.name == FULLTEXT - 2</li> <li>hosts.name == FULLTEXT - 3</li> <li>products.name, products.keywords, products.description, products.uid == FULLTEXT - 4</li> </ul> <hr> <p>Here is my SQL structure, and I used the above Query.</p> <pre><code>SELECT categories.name AS category, categories.id AS category_id, host_types.name AS host_type, host_types.id AS host_type_id, hosts.name AS host, hosts.id AS host_id, products.name as name, products.id AS product_id, products.keywords as keywords, products.description AS description, products.quantity AS quantity, products.price AS price, products.uid as catalgue MATCH(categories.name) AGAINST('search term') as cscore, MATCH(host_types.name) AGAINST('search term') as htscore, MATCH(hosts.name) AGAINST('search term') as hscore, MATCH(products.name, products.keywords, products.description, products.uid) AGAINST('search term') as score FROM products LEFT JOIN hosts ON products.host_id = hosts.id LEFT JOIN host_types ON hosts.host_id = host_types.id LEFT JOIN categories ON host_types.category_id = categories.id WHERE MATCH(categories.name) AGAINST('search term') OR MATCH(host_types.name) AGAINST('search term') OR MATCH(hosts.name) AGAINST('search term') OR MATCH(products.name, products.keywords, products.description, products.uid) AGAINST('search term') ORDER BY score DESC CREATE TABLE `categories` ( `id` int(5) unsigned NOT NULL auto_increment, `display_order` int(5) unsigned default NULL, `name` varchar(64) default NULL, `last_modified` timestamp NOT NULL default CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP, PRIMARY KEY (`id`), UNIQUE KEY `order` (`display_order`), FULLTEXT KEY `full_name` (`name`) ) ENGINE=MyISAM AUTO_INCREMENT=6 DEFAULT CHARSET=latin1; CREATE TABLE `host_types` ( `id` int(5) unsigned NOT NULL auto_increment, `category_id` int(5) unsigned default NULL, `display_order` int(5) unsigned default NULL, `name` varchar(64) default NULL, `last_modified` timestamp NOT NULL default CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP, PRIMARY KEY (`id`), UNIQUE KEY `order` (`category_id`,`display_order`), FULLTEXT KEY `full_name` (`name`) ) ENGINE=MyISAM AUTO_INCREMENT=13 DEFAULT CHARSET=latin1; CREATE TABLE `hosts` ( `id` int(5) unsigned NOT NULL auto_increment, `host_id` int(5) unsigned default NULL, `display_order` int(5) unsigned default NULL, `name` varchar(64) default NULL, `last_modified` timestamp NOT NULL default CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP, PRIMARY KEY (`id`), UNIQUE KEY `order` (`host_id`,`display_order`), FULLTEXT KEY `full_name` (`name`) ) ENGINE=MyISAM AUTO_INCREMENT=4 DEFAULT CHARSET=latin1; CREATE TABLE `products` ( `id` int(11) unsigned NOT NULL auto_increment, `host_id` int(5) unsigned default NULL, `display_order` int(5) unsigned default NULL, `uid` varchar(10) default NULL, `name` varchar(128) default NULL, `keywords` text, `description` text, `price` decimal(10,2) default NULL, `quantity` int(11) unsigned default NULL, `last_modified` timestamp NOT NULL default CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP, PRIMARY KEY (`id`), FULLTEXT KEY `full_name` (`name`,`keywords`,`description`,`uid`) ) ENGINE=MyISAM AUTO_INCREMENT=14 DEFAULT CHARSET=latin1; 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