to add an expression to a precedence constraint

after you create a default precedence constraint, you can extend the precedence constraint in the following ways

创建默认优先约束后，可按以下方式扩展优先约束

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this task contains a conditional precedence constraint that prevents the task from executing unless the

此任务包含条件优先约束，该约束阻止任务执行，除非

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when you first use ssis designer, the default value of a precedence constraint is

首次使用SSIS设计器时，优先约束的默认值为

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configuring the precedence constraint programmatically

以编程方式配置优先约束

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expressions used in a precedence constraint must evaluate to true

优先约束中使用的表达式的计算结果必须为

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resolution of the traveling salesman problem with precedence constraint applying genetic algorithm

运用遗传算法求解有约束条件的旅行商问题

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this procedure describes how to add an expression to a precedence constraint by using the precedence constraint editor dialog box.

此过程介绍如何使用“优先约束编辑器”对话框将表达式添加到优先约束。

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on the design surface of the control flow tab, double-click the precedence constraint.

在“控制流”选项卡的设计图面上双击优先约束。

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ssis designer uses color to identify the type of precedence constraint.

SSIS设计器用颜色标识优先约束的类型。

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the connector between two items represents a precedence constraint.

两个项之间的连接器表示优先约束。

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this procedure describes how to set a value for a precedence constraint by using the shortcut menu.

此过程介绍如何使用快捷菜单设置优先约束的值。

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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。

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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。

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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。

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if the precedence constraint uses an evaluation result, you can provide an expression that evaluates to a boolean.

如果优先约束使用计算结果，则您可以提供计算结果为布尔值的表达式。

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the precedence constraint uses a constraint value, an expression , both, or either to determine whether the constrained executable runs .

失败要求优先可执行文件失败，受约束的可执行文件便可运行。

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tab, click the task or container and drag its connector to the executable to which you want the precedence constraint to apply.

选项卡的设计图面上，单击任务或容器，并将其连接线拖动到要将优先约束应用到其上的可执行文件。

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we presented the conception of change rate of nodes architecture theory of concept similarity.

结构变更分析中借鉴概念图相似度的思想,提出了节点结构变更率的概念.

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concept maps have their origin in the work of ausubel ( advanced organizers ).

概念图有其原产地在工作中,朱奥苏贝尔 ( 先进的组织者 ).

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according to the theory of solution the emulsion system has been selected.

按照有机性值相近相溶的原则,参照有机概念图,选择乳化体系.

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