For federated statements, this will be the mechanism that overwrites the document's internal schema specification if the schema information is not accessible by the DB2 server.
对于联邦语句而言，如果模式信息不能由DB 2服务器访问，那么就会改写文档的内部模式规范。
Such statements suggest "service" is more concrete, that is, a specification of something, but still not something with which a requester can interact.
这些话表明“服务”比较具体，也就是说，是某种东西的规范，但仍然不是请求者可以与之交互的东西。
A limitation of the JDBC 2 specification is that statements that return multiple results must have only one ResultSet open at any given time.
JDBC 2规范的一个局限是，在任意时刻，返回多重结果的语句只能打开一个ResultSet。
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