void API::Update(SQLUpdate& statement)
{
if (current_db_.length() == 0) throw NoDatabaseSelectedException();
Database *db = catalog_m_->GetDB(current_db_);
if (db == NULL) throw DatabaseNotExistException();
Table *tb = db->GetTable(statement.get_tb_name());
if (tb == NULL) throw TableNotExistException();
RecordManager *rm = new RecordManager(catalog_m_, buffer_m_, current_db_);
rm->Update(statement);
delete rm;
}
/*更新数据*/
void API::Update(SQLUpdate& sql_statement)
{
if (current_database_.length() == 0)/*判断当前数据库是否选定*/
{
throw NoDatabaseSelectedException();
}
Database *db = catalog_manager_->GetDB(current_database_);
if (db == NULL)/*判断当前数据库是否存在*/
{
throw DatabaseNotExistException();
}
Table *tb = db->GetTable(sql_statement.get_tb_name());
if (tb == NULL)/*判断数据表是否存在是否存在*/
{
throw TableNotExistException();
}
RecordManager *rm = new RecordManager(catalog_manager_, buffer_manager_, current_database_);
rm->Update(sql_statement);
delete rm;
//cout << "更新数据" << endl;
}