这类问题的一个示例来自数据库访问对象。
One example of this problem comes with database access objects.
应用程序的主要层是数据库、持久性框架、数据库访问对象和用户界面(UI)控制器及视图层。
The main layers of the application are a database, a persistence framework, a database access object, and user interface (UI) controller and view layers.
如果你的数据库包含敏感信息，您可能希望限制对编目视图的访问，因为编目描述了数据库中的每一个对象。
If your database contains sensitive data, you might want to limit access to the catalog views, because the catalog describes every object in the database.
用户映射-对于希望用前面定义的服务器对象访问远程数据库的每个用户，都必须创建一个用户映射。
User mapping - a user mapping has to be defined for each user who wants to access the remote database using the previously defined server object.
不过，如果您已经小心地隔离了一些对象方法内的数据库访问代码，则修改将很可能十分轻微且集中。
However, if you've carefully isolated your database access code within a handful of object methods, your modifications will likely be slight and centralized.
与数据库资源一样，通过使用可以合用的连接对象来访问消息队列。
As in the case of a database resource, message queues are accessed using connection objects that can be pooled.
对底层数据库对象的访问只能通过包中的特定语句进行。
The only access to the underlying database objects is through the specific statements in the package.
持久性类封装对持久性存储的访问，包括关系数据库、平面文件和对象库。
Persistence classes encapsulate access to your persistent stores, including relational databases, flat files, and object bases.
DB 210还包括几个新的数据库设计功能，比如内联大对象(LOB)、散列表访问和RELEASE (DEALLOCATE)，这些功能能够提高性能并减少CPU占用。
DB2 10 also includes a number of new database design capabilities, such as inline large objects (LOBs), hash access, and RELEASE (DEALLOCATE), that can improve performance and cut CPU usage.
PDO是PHP数据对象的缩写， 是一种访问数据库的更便捷、安全的途径。
PDO is an acronym for PHP Data Objects. PDO is a lean, consistent way to access databases.
最后，讨论了在多用户环境中如何使用模式有效地控制对数据库对象的访问。
Finally, we covered how schemas can be used as an effective mechanism for controlling access to database objects in multi-user environments.
以下代码示例显示了EJB应用如何利用合用的连接对象来访问数据库资源(基于JDBC 2.0)。
The following code example shows how an EJB application might access a database resource by using pooled connection objects (based on JDBC 2.0).
该草案当前版本包含了对访问数据库对象和查询本地数据存储的定义。
The current draft spec from the working group includes definitions for a Database object for accessing and querying a local data store.
这时应该创建逻辑单元，以便将数据库访问聚合到相关对象中。
Logical units should be created to aggregate database access to related objects.
数据服务器层是数据网格的组成部分，通过在内存中缓存对象来缓冲数据库访问，以实现更高的性能。
Data Server tier, part of data Grid, buffers database access by caching objects in-memory for higher performance.
这意味着用户不能直接访问底层数据库对象。
This does not imply that the user has direct access to the underlying database objects.
这一方式具备的明显优势就是能够减少数据库调用，从而减少事务负载，更快地访问网格（grid）中的对象。
The obvious advantage of this scenario is reduced database calls and therefore reduced transaction load and faster access to objects in the grid.
在本例的Db2admin 中，用于访问数据库的帐户名称预先计划到每个业务对象。
The account name used to access the database, in this case Db2admin, is prepended to each business object.
该数据访问对象极其简单；它不连接任何外部资源(比如关系数据库)以获得Test实例。
This data access object is extremely simple; it does not connect to any external resources (such as relational databases) to obtain Test instances.
通过使用Informix4GL丰富的语言支持，可以轻松地实现用户界面和业务逻辑，还可以在其中嵌入用于访问数据库对象的SQL语句。
Using Informix 4GL's rich language support, it is easy to implement the user interface and the business logic that might involve embedding the SQL statements to access the database objects.
使用模式控制对数据库对象的访问。
在清单1中，FESI数据库访问扩展名提供了通用的Database对象。
In Listing 1, the FESI database access extension provides the versatile database object.
通过调用DatabaseMetaData对象中的适当方法在JDBC中访问数据库元数据，见清单3。
You access database metadata in JDBC by calling the appropriate method from the DatabaseMetaData object, as shown in Listing 3.
DB - aware对象创建的SQL语句根据所访问数据库的物理数据模型而生成。
The SQL statement created by the DB-aware objects will be generated based on the physical data model for the database being accessed.
DAOConfig对象拥有访问所需的细节，比如哪个服务器、端口、数据库、视图，等等。
The DAOConfig object has the details of which server, port, database, view, and so on, to go against.
因为将访问后端lotusNotes对象(如数据库、文档和视图)，并且调用ui线程，所以将在该方法中产生新线程。
Because we access backend Lotus Notes objects like databases, documents, and views, and because you call on the UI thread, you spawn a new thread in this method.
'lazyloading '告知NHibernate不要从数据库表中加载这个类对象，直到程序中需要访问这个对象的数据时才加载。
'Lazy loading' tells NHibernate not to load an object from the database until the application needs to access its data.
这些编目描述了数据库对象，例如表、列和索引，并包含关于用户所拥有的访问这些对象的访问类型的信息。
The catalog describes the database objects, such as tables, columns, and indexes, and contains information about the types of access that users have to these objects.
一旦应用程序连接到联合数据库，就能访问联合数据库中的所有已授权对象。
Once an application is connected to the federated database, it can access all authorized objects in the federated system.
安全标签是应用到行和列上以保护数据的数据库对象，将安全标签授给用户时他们才可以访问受保护的数据。
Security labels are database objects applied to rows and columns in order to protect data, and granted to users to give them access to protected data.
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