function upgrade($old_version)
{
$q = new DBQuery();
switch ($old_version) {
case '0.1':
$q->alterTable('history');
$q->addField('history_table', 'varchar(15) NOT NULL default \'\'');
$q->addField('history_action', 'varchar(10) NOT NULL default \'modify\'');
$q->dropField('history_module');
$q->exec();
$q->clear();
case '0.2':
$q->alterTable('history');
$q->addField('history_item', 'int(10) NOT NULL');
$q->exec();
$q->clear();
case '0.3':
$q->alterTable('history');
$q->addIndex('index_history_item', '(history_item)');
$q->exec();
$q->clear();
$q->alterTable('history');
$q->addIndex('index_history_module', '(history_table, history_item)');
$q->exec();
$q->clear();
case '0.31':
break;
}
return db_error();
}
public function upgrade($old_version)
{
$q = new DBQuery();
switch ($old_version) {
case '0.3':
$q->alterTable('history');
$q->addIndex('index_history_item', '(history_item)');
$q->exec();
$q->clear();
$q->alterTable('history');
$q->addIndex('index_history_module', '(history_table, history_item)');
$q->exec();
$q->clear();
case '0.31':
$q->alterTable('history');
$q->alterField('history_table', 'varchar(20) NOT NULL default ""');
$q->alterField('history_action', 'varchar(20) NOT NULL default "modify"');
$q->exec();
$q->clear();
case '0.32':
break;
}
return db_error() ? false : true;
}