Federated object registration: a wrapper encapsulates the data source characteristics from the federated engine.
联邦对象注册：包装器封装了来自联邦引擎的数据源特征。
2
Every database engine has its own characteristics and usually there is a need for a platform specific SQL tuning.
每个数据库引起都有自己的特点，通常需要针对平台进行专门的SQL优化。
3
Given the use and characteristics of the tables in the messaging engine database, only the SIBnnn tables are likely candidates for reclamation — sorry, maintenance.