用例7：使用用户定义类型(udt)。
异常不能当作用户定义类型的数据成员使用。
Exceptions cannot be used as data members of user-defined types.
这样就可以进一步强制性的控制用户定义类型。
This allows more control over the coercion behavior of user-defined types.
指示用户定义类型(udt)的方法或属性的确定性和数据访问性质。
Indicates the determinism and data access properties of a method or property on a user-defined type (UDT).
对于DB 2索引扩展要注意的一点是对用户定义类型的需求—distinct类型或结构化类型。
One thing to be aware of regarding DB2 index extensions is the requirement for user-defined types - either distinct types or structured types.
清单19中的示例代码创建了一个明显的名为“birthday”的用户定义类型，并在创建外部表时用作列类型。
The example code in Listing 19 creates a distinct user-defined type called "birthday" and is being used as the column type while creating the external table.
图3显示了SQLmodel表对象，其中Table是一个抽象类，它可以有1到多个列，或者0到多个用户定义类型。
Figure 3 presents the SQL Model table objects, where table is an abstract class and can have one to many columns.
每个数据库对象有0到多个(0. .n)模式，每个模式可以有0到多个(0 . . n)表、索引、用户定义类型和例程等。
A database object can have zero to many (0.. n) schemas, and a schema can have zero to many (0.. n) tables, indexes, user-defined types, routines, and so on.
这是一个在SOAP请求中使用用户定义数据类型的示例。
This is an example of employing user defined data types in SOAP requests.
函数索引可以根据用户定义的类型创建。
您甚至可能希望创建用户定义的类型以便将确切的所需选项传递到每个函数，这样将允许每个函数的执行使用一组不同的选项。
You may even want to create a user-defined type to pass the exact required options to each of the functions, which would allow each execution of a function to use a different set of options.
我们可以处理两种类型的异常：用户定义的阈值异常和针对死锁的事件异常。
We can process both types of exceptions, the threshold exceptions that are user-defined and the event exceptions for deadlocks.
联合成员可以是任何类型，包括用户定义的复杂类型。
The union member can be any type, including user-defined complex types.
这两种序列都可以不包含元素、用户定义的类型，但可以包含其它序列。
Both types of sequences may contain no elements, user-defined types, or they may contain other sequences.
结构化数据类型是一种用户定义的数据类型，它包含了一系列的属性，每一个属性都有一个数据类型。
A structured data type is a form of user-defined data type that contains a sequence of attributes, each of which has a data type.
在DB 2 9.7中，增加了更多xml特性，比如支持在用户定义函数中使用xml类型。
In DB2 9.7 additional XML features were included such as support for the XML type in User Defined Funcions.
最后，我简述了用户定义数据类型的主题，它是一个需要我们仔细学习的高级主题。
Finally, I briefly covered the topic of user-defined data types, which is an advanced topic that needs detailed study.
在此系列文章的下一部分，您会学习更多的用户定义数据类型示例。
In the next part of this series of articles, you will see more examples of user-defined data types.
例如，表可能依赖于用户定义的不同类型；检查约束依赖于函数；视图依赖于视图、别名和函数；等等。
For example, tables may depend on user-defined distinct types; check constraints depend on functions; views depend on views, aliases, and functions; and so on.
它们是新数据类型ROW和用户定义函数（UDF）。
They are the new data type ROW and the user-defined functions (UDFs).
因此引入了定制字段，它是一组用户针对特定类型的文档定义的扩展属性。
As a result, custom fields were introduced, which are a set of extended properties that users can define and provide for a specific type of document.
soap带给表的第二个主要元素是编码用户定义的数据类型的简单方式。
The second major element that SOAP brings to the table is a simple means of encoding user-defined data types.
作为可选项，也有可能支持用户自定义类型，这将极大的简化所要求的表达式。
It may optionally support user defined types, which can greatly simplify the required expressions.
用户定义他们的需求类型的能力。
The ability for users to define their own requirement types.
分析安全需要并设置角色模型(定义用户类型)。
Analyze the security requirements and set up role models (define user types).
导入定义类型的用户(信号参数)。
对于包含用户定义数据类型的表，除非所有EnterpriseReplication节点上存在相同的UDT定义，否则不能这样做。
This cannot be done for tables that contain user-defined data types unless the same UDT definition exists on all Enterprise Replication nodes.
可以使用系统编目视图来轻松地检索关于用户定义数据类型或例程的信息。
You can use the system catalog views to easily retrieve information about user-defined data types or routines. For example
这是一种用户定义数据类型，它定义了存储在TimeSeries中的列或数据的元素。
This is a user-defined datatype that defines the columns or elements of data to be stored in the TimeSeries.
Haskell中最突出的三种数据结构是：tuple、列表(list)和用户定义的类型。
The three most prominent data structures in Haskell are tuples, lists, and user-defined types.
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