First you map the collection value to a user - defined variable , and then you implement a property expression on the property that uses the variable 首先，将集合值映射到用户定义变量；然后，对使用该变量的属性执行一个属性表达式。
The system variables provide useful information about package objects at run time , and user - defined variables support custom scenarios in packages 系统变量在运行时提供有关包对象的有用信息；用户定义的变量支持包中的自定义方案。
The expressions can use system or user - defined variables , together with the operators , functions , and type casts that the expression language provides 表达式可以使用系统变量或用户定义的变量以及表达式语言提供的运算符、函数和类型转换。
Select the user - defined variable that contains the name of a table or view in the database that contains the data , and then set the fast - load options 在包含该数据的数据库中选择包含表名称或视图名称的用户定义变量，然后设置快速加载选项。
Where some languages require you to predefine variables and assign them " data types , " rexx defines variables dynamically by their contents and use 有些语言要求预定义变量，并指定变量的“数据类型” ，而rexx则通过变量的内容和使用情况动态地定义变量。
Each time a file name is found that matches the specified file name criteria , the foreach loop container populates the user - defined variable with the file name 每次找到与指定的文件名条件匹配的文件名时， foreach循环容器都将用该文件名填充用户定义的变量。
Is the name of a user - defined variable containing a transaction name used to track the distributed transaction within ms dtc utilities . the variable must be declared with a 用户定义的一个变量名，它含有一个事务名，该事务名用于跟踪ms dtc实用工具中的分布式事务。
Variables that are used in containers include the container - level system variables that integration services provides and the user - defined variables that the container uses 容器中使用的变量包括integration services提供的容器级别系统变量和容器使用的用户定义变量。
The checkpoint file includes the execution results of all completed containers , the current values of system and user - defined variables , and package configuration information 检查点文件包括所有已完成的容器的执行结果、系统变量和用户定义的变量的当前值以及包配置信息。
The user - defined variables that are used in parameter bindings are usually defined with data types that are compatible with the data types of parameters to which they are mapped 在参数绑定中使用的用户定义变量通常是以与映射到它们的参数的数据类型兼容的数据类型来定义的。
