public static function activate()
 {
     piklist::create_table('post_relationships', 'relate_id bigint(20) unsigned NOT NULL auto_increment
     ,post_id bigint(20) unsigned NOT NULL
     ,has_post_id bigint(20) unsigned NOT NULL
     ,PRIMARY KEY (relate_id)
     ,KEY post_id (post_id)
     ,KEY has_post_id (has_post_id)');
 }
 public static function activate($network_wide)
 {
     $table = piklist::create_table('termmeta', 'meta_id bigint(20) unsigned NOT NULL auto_increment
     ,term_id bigint(20) unsigned NOT NULL default "0"
     ,meta_key varchar(255) default NULL
     ,meta_value longtext
     ,PRIMARY KEY (meta_id)
     ,KEY term_id (term_id)
     ,KEY meta_key (meta_key)', $network_wide);
 }