一个规则包含以下部件: 1、规则条件(rule condition):将一个或多个表达式和条件组合在一起并返回一个布尔值,基于一个 事件这个值可以为true,false,null。
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selecting rule condition technique 条件优选技术
CREATE RULE rulename AS condition 语法
condition rule set 条件规则集
condition rule 条件规则
event-condition-action rule 事件
condition-action rule 行动规则 ; 动作规则 ; 条件
event condition action eca rule 事件条件动作规则
You'll create a business rule template that includes a rule condition, a rule action and a rule parameter.
您将创建包括规则条件、规则操作和规则参数的业务规则模板。
The annotations beside each implementation document the condition (business rule) that triggers the selection of the corresponding implementation at execution time.
每个实现旁边的注释记录了在执行时触发对相应实现的选择的条件(业务规则)。
You can use a SIGNAL statement to raise an error condition if the business rule defined in your trigger is violated.
如果违反了您在触发器中定义的业务规则,就可以使用signal语句来抛出一个错误条件信号。
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