table_name()} ( `id` int NOT NULL AUTO_INCREMENT, `parent_id` int NOT NULL, `key` longtext NOT NULL, `value` longtext, `meta_key` longtext, `meta_value` longtext, UNIQUE KEY (`id`) ) {$this->charset_collate( true )};"; dbDelta( $query ); } /** * Function to run our stage three upgrades. * * @since 3.3.12 * * @updated 3.4.0 */ public function cache_collate_fields() { // If the meta_key column has not already been defined... if ( ! $this->column_exists( 'meta_key' ) ) { global $wpdb; // Modify our table. $query = "ALTER TABLE {$this->table_name()} ADD `meta_key` longtext {$this->charset_collate()}, ADD `meta_value` longtext {$this->charset_collate()}"; $wpdb->query( $query ); } } }