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- The Precedence Constraint Editor opens. “优先约束编辑器”将打开。
- The connector between two items represents a precedence constraint. 两个项之间的连接器表示优先约束。
- In the Accessibility group, select Show precedence constraint labels. 在“辅助功能”组中,选中“显示优先约束标签”。
- The precedence constraint can use the following execution results alone or in combination with an expression. 优先约束可以单独使用下列执行结果或将这些结果与表达式结合使用。
- After you create a default precedence constraint, you can modify the properties of the precedence constraint. 创建默认优先约束后,即可修改优先约束的属性。
- A precedence constraint defines the relationship between the two connected items. 优先约束定义了两个连接项之间的关系。
- The precedence constraint uses a constraint value, an expression, both, or either to determine whether the constrained executable runs. 优先约束同时使用约束值和表达式,或者使用其中任一个来决定受约束的可执行文件是否运行。
- The default precedence constraint uses a constraint only, and the constraint requires that the precedence executable runs successfully. 默认优先约束仅使用一个约束,该约束要求优先可执行文件必须运行成功。
- If you want Task 2 to begin execution only if Task 1 fails to execute successfully, link Task 1 to Task 2 with an On Failure precedence constraint. 如果想让任务2只在任务1无法成功执行时开始执行,则可以使用“失败时”优先约束将任务1链接到任务2。
- On the design surface of the Control Flow tab, right-click the precedence constraint, and then click Success, Failure, or Completion. 在“控制流”选项卡的设计图面上,右键单击优先约束,然后单击“成功”、“失败”或“完成”。
- You also can issue multiple precedence constraints on a task. 您还可以对一个任务发出多个优先约束。
- You can now add annotations to precedence constraints. 现在,您可以向优先约束添加批注。
- The fact proved that the import of graph optimization to real-time precedence constraint tasks scheduling is an efficient approach to solve the problem of scheduling the precedence constraint task. 仿真结果表明;该算法在降低算法复杂度的同时较其它相关算法具有更好的调度性能;从而证明在实时优先约束任务调度中引入图优化的理论是解决优先约束任务调度问题的一个有效途径.
- Specify whether the precedence constraint is evaluated singly or together with other constraints that apply to the constrained executable. 指定优先约束是单独计算还是与应用于受约束可执行文件的其他约束一起计算。
- Describes how the Package Migration Wizard migrates precedence constraints, and explains the steps that you can take after migration to enhance precedence constraint behavior. 介绍包迁移向导如何迁移优先约束,以及迁移后可用于增强优先约束行为的步骤。
- In SSIS Designer, precedence constraints are displayed in green, red, or yellow, depending on whether the constraint condition is Success, Failure, or Complete. 在SSIS设计器中,根据约束条件是“成功”、“失败”还是“完成”,优先约束以绿色、红色或黄色显示。
- The control flow elements define the logical ordering of job progression by applying precedence constraints. 控制流元素通过应用优先约束来定义作业进行的逻辑顺序。
- Connect tasks and containers in the For Loop container using precedence constraints. 使用优先约束连接For循环容器中的任务和容器。
- Event handlers also use precedence constraints to link their executables into a control flow. 事件处理程序也使用优先约束将其可执行文件链接为控制流。
- The following table shows the types of precedence constraints you can use in DTS. 下表显示了可以在DTS中使用的优先约束的类型。